DANGER - Blemo

2354235 11/2008 

Soft start - soft stop unit 

SH31 

User manual 

09/2010 

BLEMO ® Frequenzumrichter 

Siemensstraße 4 

D-63110 Rodgau – Dudenhofen 

Germany 

Tel.: ++49 / 6106 / 82 95-0 

Fax: ++49 / 6106 / 82 95-20 

Internet: www.blemo.com 

E-Mail: info@blemo.com

Content 

Important Information __________________________________________________________________________________________ 4 

Before you begin______________________________________________________________________________________________ 5 

Documentation structure________________________________________________________________________________________ 6 

Steps for setting up the soft starter ___________________________________________________________________ 7 

Receiving and handling ________________________________________________________________________________________ 8 

Selection ___________________________________________________________________________________________________ 10 

Dimensions and weights_______________________________________________________________________________________ 14 

Mounting ___________________________________________________________________________________________________ 17 

Mounting - Fan option_________________________________________________________________________________________ 20 

Thermal protection ___________________________________________________________________________________________ 22 

Wiring _____________________________________________________________________________________________________ 26 

Wiring - power terminals_______________________________________________________________________________________ 32 

Wiring - control terminals ______________________________________________________________________________________ 35 

Wiring - in line connection - application diagram ____________________________________________________________________ 38 

Display terminal _____________________________________________________________________________________________ 42 

Remote keypad display - option _________________________________________________________________________________ 44 

Programming _______________________________________________________________________________________________ 45 

List of parameters____________________________________________________________________________________________ 48 

Parameter settings ___________________________________________________________________________________________ 49 

Configuration menu (ConF) ____________________________________________________________________________________ 50 

Settings menu (SEt) __________________________________________________________________________________________ 51 

Advanced adjustments menu (AdJ) ______________________________________________________________________________ 53 

Advanced settings menu (SEt2) _________________________________________________________________________________ 55 

Advanced protections menu (PrO) _______________________________________________________________________________ 56 

Advanced IO menu (IO) _______________________________________________________________________________________ 60 

Advanced communication menu (COP) ___________________________________________________________________________ 62 

Advanced monitoring menu (SUP) _______________________________________________________________________________ 63 

Utility menu (UtIL)____________________________________________________________________________________________ 64 

Command channel ___________________________________________________________________________________________ 65 

Modbus Function ____________________________________________________________________________________________ 68 

Connection to RS485 bus______________________________________________________________________________________ 73 

Maintenance ________________________________________________________________________________________________ 74 

Diagnostics / Troubleshooting __________________________________________________________________________________ 75 

Parameter Index and Modbus addresses__________________________________________________________________________ 77 

Annex 1: UL508 schematics____________________________________________________________________________________ 82 

Annex 2: Short-circuit rating and branch circuit protection _____________________________________________________________ 84 

3

AlImportant Information 

NOTICE 

Read these instructions carefully, and look at the equipment to become familiar with the device before trying to install, operate, or maintain 

it. The following special messages may appear throughout this documentation or on the equipment to warn of potential hazards or to call 

attention to information that clarifies or simplifies a procedure. 

PLEASE NOTE 

Electrical equipment should be installed, operated, serviced, and maintained only by qualified personnel. No responsibility is assumed by 

BLEMO for any consequences arising out of the use of this product. 

© 2010 BLEMO All Rights Reserved. Before you begin: 

Read and understand these instructions before performing any procedure with this soft starter. 

4 

The addition of this symbol to a Danger or Warning safety label indicates that an electrical hazard exists, which will result in 

personal injury if the instructions are not followed. 

This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow 

this symbol to avoid possible injury or death. 

DANGER 

DANGER indicates an imminently hazardous situation, which, if not avoided, will result in death or serious injury. 

WARNING 

WARNING indicates a potentially hazardous situation, which, if not avoided, can result in death, serious injury or 

equipment damage. 

CAUTION 

CAUTION indicates a potentially hazardous situation, which, if not avoided, can result in injury or equipment 

damage. 

CAUTION 

CAUTION, used without the safety alert symbol, indicates a potentially hazardous situation which, if not avoided, 

can result in equipment damage. 

DANGER

HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH 

• Read and understand this manual before installing or operating the SH31. Installation, adjustment, repair, and maintenance must be 

performed by qualified personnel. 

• The user is responsible for compliance with all international and national electrical code requirements with respect to grounding of 

all equipment. 

• Many parts of this soft starter, including the printed circuit boards, operate at the line voltage. DO NOT TOUCH. Use only electrically 

insulated tools. 

• DO NOT touch unshielded components or terminal strip screw connections with voltage present. 

• Before servicing the soft starter: 

- Disconnect all power, including external control power that may be present. 

- Place a “DO NOT TURN ON” label on all power disconnects. 

- Lock all power disconnects in the open position. 

• Install and close all covers before applying power or starting and stopping the soft starter. 

Failure to follow these instructions will result in death or serious injury. 

UNINTENDED EQUIPMENT OPERATION 


• Read and understand this manual before installing or operating the SH31. 

• Any changes made to the parameter settings must be performed by qualified personnel. 


DAMAGED SOFT STARTER EQUIPMENT 

WARNING 

Do not operate or install any soft starter or soft starter accessory that appears damaged. 

Failure to follow these instructions can result in death, serious injury, or equipment damage. 

LOSS OF CONTROL 

WARNING 

• The designer of any control scheme must 

- consider the potential failure modes of control paths and, for certain critical control functions, 

- provide a means to achieve a safe state during and after a path failure. 

Examples of critical control functions are emergency stop and overtravel stop. 

• Separate or redundant control paths must be provided for critical control functions. 

• System control paths may include communication links. Consideration must be given to the implications of unanticipated 

transmission delays or failures of the link. (1) 

• Each implementation of an SH31 soft starter must be individually and thoroughly tested for proper operation before being placed into 

service. 


(1)For additional information, refer to NEMA ICS 1.1 (latest edition), “Safety Guidelines for the Application, Installation, and Maintenance 

of Solid State Control”. 

5

Documentation structure 

The following SH31 technical documents are available on the BLEMO website (www.blemo.com). 

User manual 

This manual describes how to install, commission, operate and program the soft starter. 

Quick Start guide 

This document is delivered with the soft starter, and you can download it on www.blemo.com. 

6

Steps for setting up the soft starter (also refer to Quick Start guide) 

Steps 1 to 4 are 

performed with 

the power off. 

1. Receive and Inspect the soft starter 

Check that the soft starter reference on the nameplate is similar to the purchase order. 

Remove the SH31 from packaging and check that it has not been damaged 

2. Check the line voltage compatibility 

Check that the line voltage, and control voltage are compatible with the soft 

starter (pages 11 to 13). 

3. Mount the soft starter vertically 

Mount the soft starter in accordance with the instructions in this 

document (page 17). 

4. Wire the soft starter (page 29) 

Connect the motor, ensuring that its connections correspond to 

the voltage. 

Connect the line supply, after making sure that the power is off. 

Check and Connect the control supply on CL1-CL2 

5. Configure the soft starter 

(page 45) 

Power on control, and do not give a start command. 

Adjust UIn line voltage. 

AdjustIn motor rated current. 

6. Start 

7

Receiving and handling 

Introduction 

The SH31 offers acceleration and deceleration control of standard three-phase asynchronous induction (squirrel cage) motors. The SH31 

controls the motor performance based on the motor torque rather than simple voltage or current based control. Advanced control algorithms 

are incorporated to help smooth rotation throughout the starting ramp and reducing mechanical instability at the end of starting. 

A digital keypad display is provided for soft starter setup and motor performance display. 

The SH31 is available in 15 current ratings from 17 to 590 A. SH31 are rated for use from 208 to 600 V motors, and are self-adjusting for 

a 50 or 60 Hz supply frequency. 

This user manual covers the technical characteristics, specifications, installation, wiring, programming, and troubleshooting of SH31. 

Terminology 

Some of the terms and acronyms used in this manual are defined in the table below: 

Receiving and Preliminary Inspection 

Before installing the SH31 soft starter, read this manual and follow all precautions. 

Before removing the SH31 soft starter from its packing material, verify that the packing carton is not damaged from shipping. Damage to 

the packing carton usually indicates improper handling. If any damage is found, notify the carrier and your BLEMO representative. 

After removing the SH31 soft starter from its packaging, inspect it for damage. If any shipping damage is found, notify the carrier and your 

sales representative. Verify that the SH31 soft starter nameplate and label conform to the packing slip and corresponding purchase order. 

Storing and Shipping 

If the SH31 soft starter is not being immediately installed, store it in a clean, dry area where the ambient temperature is between -25° C and 

+70°C (-13°F and +158°F). 

If the SH31 soft starter must be shipped to another location, use the original shipping material and carton to help protect it. 

8 

Term Definition 

Soft starter FLA 

Motor FLA 

Soft starter Full Load Amps 

This value is on the soft starter nameplate IcL. 

IcL: Soft starter rated current 

Motor Full Load Amps 

This value is on the motor nameplate. 

The current rating of an induction motor at rated speed and load. 

Soft starter in line connection: In = rated current of the motor FLA. 

Soft starter inside delta connection: In = rated current of the motor FLA / 3. 

OCPD Overcurrent protective device. 

DAMAGED SOFT STARTER EQUIPMENT 

Do not operate or install any soft starter that appears damaged. 

WARNING 

Failure to follow these instructions can result in death, serious injury, or equipment damage.

Receiving and handling 

Handling the soft starter 

Hoisting the SH31 

The SH31 range comprises 5 frame sizes, with various weights and dimensions. 

Small soft starters can be removed from their packaging and installed without a handling device. A handling device must be used from 

SH31-110/4; for this reason they are supplied with lifting holes. 

HANDLING AND LIFTING HAZARD 

Package content 

• Soft starter 

• Quick Install guide 

• Package of screws for frame sizes C, D and E 

• Allen key, supplied with size B products 

WARNING 

Keep the area below any equipment being lifted clear of all personnel and property. Use the lifting method as shown below. 


45° 

maxi 

Do not remove the SH31 from the carton until it is at the final installation site. Handle 

the soft starter carefully after removing it from the carton to avoid damage to the 

internal components, frame, or exterior. Once removed from the carton, the soft starter 

can be handled: 

• With a hoist. When hoisting the soft starter, attach a spreader bar to the two 

lifting holes on top as shown below. 

• In a horizontal position, with the back of the soft starter resting on a pallet. 

9

Selection 

Torque characteristic 

Soft starter selection 

S1 motor duty corresponds to starting followed by operation at constant load enabling the thermal stability to be reached. 

S4 motor duty corresponds to a cycle comprising starting, operation at constant load and an idle period. This cycle is characterized by a 

load factor. 

The SH31 must be selected depending on the type of application ("standard" or "severe") and the nominal power of the motor. "Standard" 

or "severe" applications define the limiting values of the current and the cycle for motor duties S1 and S4. These duties are described in the 

IEC 60034-1. 

Standard application 

Example: centrifugal pump 

In standard application, the SH31 is designed to provide: 

• in S1 duty: starting at 3.5 In for 40 seconds from a cold state. 

• in S4 duty: a load factor of 90% and n starts per hour (see table below), with 3.5 In for 20 seconds or an equivalent thermal cycle. 

In this case, the motor thermal protection must conform to protection class 10. 

: 

Framesize In S4 duty, number of 

starts (1) per hour 

Standard With fan 

A 6 10 

B 6 10 

C 4 10 

D NA 4 

E NA 4 

(1) Note : in case of both soft starts and soft stops, the number of starts has to be divided by 2. 

Severe application 

The SH31 rating is limited to 3.5 IcL, see table page 19.IcL is the nominal current of the SH31. If the application requires a higher rated 

starting current (> 3.5 IcL), the soft starter must be oversized. See soft starter selection table, page 11. 

Soft starter sizing according to thermal protection class 

Starting current Protection class 

Class 10 Class 20 Class 30 

y 3.5In 

Nominal* Nominal + 1** Nominal + 2*** 

max starting time 16 s 

32 s 

48 s 

* Nominal = nominal size of the soft starter according to the nominal motor current (Motor FLA). 

** Nominal + 1 = oversize the soft starter by one rating compared to the nominal motor current (Motor FLA). 

*** Nominal + 2 = oversize the soft starter by 2 ratings compared to the nominal motor current (Motor FLA). 

10 

Ts and Is: Direct on line starting of an asynchronous motor. 

Ts1: Total torque range available with an SH31, which is dependent on the limiting 

current ILt, page 51. 

The progression of the soft starter is controlled by the motor torque within this range. 

Tr: Resistive torque, which must always be less than the Ts1 torque.

Selection 

Standard application, SH31-.../4, 230/440 V supply, 

soft starter in line connection 

Motor SH31-.../4, 230/440 V (+ 10% - 15%) - 50/60 Hz (+/- 10%) 

Nominal motor power Motor nominal 

230 V 400 V 440 V 

current In 

(Motor FLA) 

kW kW kW A A 

The nominal motor current In must not exceed the maximum permanent current in class 10. 

See wiring page 30. 

Maximum surrounding temperature 

Soft starter rating IcL 

(Soft starter FLA) 

Reference 

4 7.5 7.5 14.8 17 SH31-7.5/4 

7.5 15 15 28.5 32 SH31-15.0/4 

11 22 22 42 47 SH31-22.0/4 

15 30 30 57 62 SH31-30.0/4 

18.5 37 37 69 75 SH31-37.0/4 

22 45 45 81 88 SH31-45.0/4 

30 55 55 100 110 SH31-55.0/4 

37 75 75 131 140 SH31-75.0/4 

45 90 90 162 170 SH31-90.0/4 

55 110 110 195 210 SH31-110/4 

75 132 132 233 250 SH31-132/4 

90 160 160 285 320 SH31-160/4 

110 220 220 388 410 SH31-200/4 

132 250 250 437 480 SH31-250/4 

160 315 355 560 590 SH31-315/4 

The information in the table above is based on operation at a maximum ambient temperature of 40°C (104 °F). 

The SH31 can be used up to an ambient temperature of 60°C (140°F) as long as the max. permanent curren t in class 10 is derated by 2.2% 

for each degree above 40°C (104°F). 

Example: SH31-15.0/4 at 50°C (122°F) derated by 10 x 2.2% = 22%, 32 A becomes 32 x (1-0.22) = 24.96 A (max. nominal motor current). 

11

Selection 

Standard application, SH31-.../4, 230/440 V supply, 

soft starter inside delta connection 

Only the SH31-.../4 can be installed inside delta connection. 

(1)Line current is maximum 1.5 IcL. Also, the In setting must not exceed IcL. 

Example: for a 400 V - 110 kW motor with a line current of 195 A, the minimum soft starter rating,IcL = 195/1.5 = 130 A. 

Thus select SH31-75.0/4 

The nominal motor current In must not exceed the max. permanent current in class 10. 

See wiring page 26. 





Example: SH31-15.0/4 at 50°C (122°F) derated by 10 x 2.2% = 22%, 48 A becomes 48 x 0.78 = 37.5 A (max. nominal motor current). 

12 

RISK OF DAMAGE TO THE MOTOR 

SH31-.../6 must not be installed inside delta connection. 

CAUTION 

Failure to follow these instructions can result in equipment damage. 

Motor Soft starter 230/440 V (+ 10% - 15%) - 50/60 Hz (+/- 10%) 

Nominal motor power Line current 

230 V 400 V 440 V (Motor FLA) (1) 

In setting 

(Line current/3) 

kW kW kW A A A 

Soft starter 

rating IcL 

(soft starter FLA) 

Soft starter 

reference 

5.5 11 15 25 14,4 17 SH31-7.5/4 

11 22 22 48 27,7 32 SH31-15.0/4 

18.5 45 45 70 40,4 47 SH31-22.0/4 

22 55 55 93 53,7 62 SH31-30.0/4 

30 55 75 112 64,7 75 SH31-37.0/4 

37 75 75 132 76,2 88 SH31-45.0/4 

45 90 90 165 95,3 110 SH31-55.0/4 

55 110 110 210 121,2 140 SH31-75.0/4 

15 132 132 255 147,2 170 SH31-90.0/4 

90 160 160 315 181,9 210 SH31-110/4 

110 220 220 375 216,5 250 SH31-132/4 

132 250 250 480 277,1 320 SH31-160/4 

160 315 355 615 355,1 410 SH31-200/4 

220 355 400 720 415,7 480 SH31-250/4 

250 400 500 885 511,0 590 SH31-315/4

Selection 

Standard application, SH31.../6, 208/600 V supply, soft starter in line connection 

Motor Soft starter 208/600 V (+ 10% - 15%) 50/60 Hz (+/- 10%) 

Nominal motor power Motor 

208 V 230 V 230 V 400 V 440 V 460 V 500 V 575 V nominal 

current In 

(Motor FLA) 

HP HP kW kW kW HP kW HP A A 

(1) 200 160 315 355 400 400 500 477 590 SH31-315/6 

(1)Value not indicated when there is no corresponding standardized motor. 

The nominal motor current In must not exceed the max. permanent current in class 10. 


Soft starter 

ratingIcL 

(Soft starter FLA) 

Soft starter 

reference 

3 5 4 7.5 7.5 10 9 15 14 17 SH31-7.5/6 

7.5 10 7.5 15 15 20 18.5 25 27 32 SH31-15.0/6 

(1) 15 11 22 22 30 30 40 40 47 SH31-22.0/6 

15 20 15 30 30 40 37 50 52 62 SH31-30.0/6 

20 25 18.5 37 37 50 45 60 65 75 SH31-37.0/6 

25 30 22 45 45 60 55 75 77 88 SH31-45.0/6 

30 40 30 55 55 75 75 100 96 110 SH31-55.0/6 

40 50 37 75 75 100 90 125 124 140 SH31-75.0/6 

50 60 45 90 90 125 110 150 156 170 SH31-90.0/6 

60 75 55 110 110 150 132 200 180 210 SH31-110/6 

75 100 75 132 132 200 160 250 240 250 SH31-132/6 

100 125 90 160 160 250 220 300 302 320 SH31-160/6 

125 150 110 220 220 300 250 350 361 410 SH31-200/6 

150 -(1) 132 250 250 350 315 400 414 480 SH31-250/6 




Example: SH31-15.0/6 at 50°C (122°F) derated by 10 x 2.2% = 22%, 27 A becomes 27 x 0.78 =21.06 A (max. nominal motor current). 

13

Dimensions and weights 

SH31-7.5 to 45.0/4 and /6 

For frame sizes 7.5 kW to 45.0 kW, the fan is sold separately. (1) 

c: dimension of the product alone. 

c1: dimension of the product with its fan. 

(1) The voltage of the fan has to match the control voltage of the soft starter: 

SH31-.../4 or SH31-.../6 Fan 230V 

SH31-.../6 in US edition Fan 110V 

14 

SH31- Frame 

size 

7.5/4/6 A 

15.0/4/6 A 

22.0/4/6 A 

30.0/4/6 B 

37.0/4/6 B 

45.0/4/6 B 

a b c c1 e H Standard 

G 

mm mm mm mm mm mm mm 

(in.) (in.) (in.) (in.) (in.) (in.) (in.) 

130 

(5.1) 

145 

(5.7) 

265 

(10.4) 

295 

(11.6) 

169 

(6.6) 

207 

(8.1) 

209 

(8.2) 

247 

(9.7) 

6.5 

(0.3) 

10.5 

(0.4) 

250 

(9.8) 

276 

(10.9) 

100 

(3.9) 

115 

(4.5) 

With fan 

G1 

mm 

(in.) 

65 

(2.6) 

80 

(3.15) 

D 

mm 

mm 

(in.) 

7 

(0.28) 

7 

(0.28) 

Weight 

kg (lb) 

5.5 

(12.1) 

7.8 

(17.2)


SH31-55.0 to 90.0/4 and /6 


SH31- 

Frame 

size C 

55.0/4/ 

6 

75.0/4/ 

6 

90.0/4/ 

6 

a b c c1 e H G1 P Q Q1 S D1 D2 D3 Weight 

mm 

(in.) 

150 

(5.9) 

mm 

(in.) 

356 

(14) 

mm 

(in.) 

229.5 

(9) 

mm 

(in.) 

269.5 

(10.6) 

mm 

(in.) 

10.5 

(0.41) 

mm 

(in.) 

331 

(13) 

mm 

(in.) 

120 

(4.7) 

mm 

(in.) 

40.5 

(1.6) 

c: dimension of the product alone. 

c1: dimension of the product with its fan. 

(1) The voltage of the fan has to match the control voltage of the soft starter: 

SH31-.../4 or SH31-.../6 Fan 230V 


mm 

(in.) 

34.5 

(1.3) 

mm 

(in.) 

5 

(0.2) 

mm 

(in.) 

20 

(0.8) 

mm 

(in.) 

9 

(0.35) 

mm 

(in.) 

7 

(0.28) 

mm 

(in.) 

6 

(0.23) 

kg 

(lb) 

12.2 

(26.9) 

15


SH31-110 to 315/4 and /6 

For frame sizes 110 kW to 315 kW, the fan is integrated. 

16 

SH31- Frame 

size 

110/4/ 

6 

132/4/ 

6 

160/4/ 

6 

200/4/ 

6 

250/4/ 

6 

315/4/ 

6 

D 

D 

D 

D 

E 

E 

a b c e H G1 P Q Q1 S D1 D2 Weight 

mm 

(in.) 

206 

(8.1) 

304 

(11.9) 

mm 

(in.) 

425 

(16.7) 

455 

(17.9) 

mm 

(in.) 

299 

(11.8) 

339.7 

(13.4) 

mm 

(in.) 

15 

(0.59) 

15 

(0.59) 

mm 

(in.) 

396 

(15.6) 

426 

(16.8) 

mm 

(in.) 

157 

(6.2) 

264 

(10.4) 

mm 

(in.) 

60 

(2.4) 

94 

(3.7) 

mm 

(in.) 

40 

(1.6) 

55 

(2.2) 

mm 

(in.) 

1.3 

(0.05) 

1 

(0.04) 

mm 

(in.) 

30 

(1.2) 

40 

(1.6) 

mm 

(in.) 

13.5 

(0.53) 

13.5 

(0.53) 

mm 

(in.) 

9 

(0.35) 

9 

(0.35) 

kg (lb) 

20.5 

(45.2) 

33 

(73.3)

Mounting 

Mounting Precautions 

Follow these precautions when mounting the SH31 soft starter: 

• The soft starter is compliant with pollution Degree 2 as defined in NEMA ICS1-1 or IEC 60664-1. 

• For environment pollution degree 3 install the product inside a cabinet type 12 or IP54. 



SH31 soft starters are open devices and must be mounted in a suitable enclosure. 


• The SH31 soft starter generates heat and must be properly ventilated. Refer to "Thermal considerations for sizing enclosures” page 

19 to determine power dissipated. 

• When several soft starters are installed in a control panel, arrange them in a row. Do not stack soft starters. Heat generated from the 

bottom soft starter can adversely affect the ambient temperature around the top soft starter. 

• Install the SH31 vertically, within ± 10° (other p ositions are not allowed). 

• Do not place it close to heating elements. Leave sufficient free space so that the air required for cooling purposes can circulate from 

the bottom to the top of the unit. 

• Electrical current through the SH31 will result in heat losses that must be dissipated into the ambient air immediately surrounding the 

soft starter. To help prevent a thermal fault, provide sufficient enclosure cooling and/or ventilation to limit the ambient temperature 

around the soft starter. 

S ≥ 50 mm 

(1.95 in.) 

S ≥ 100 mm (3.9 in) 

S ≥ 100 mm (3.9 in) 

S ≥ 50 mm 

(1.95 in.) 

Note: For the soft starters mounted side-by-side, the free space 

must be ≥ 50 mm (1.95 in.) 



Check that no liquid, dust or conductive object can fall into the soft starter (degree of protection IP00 from above). 


17

Mounting 

Soft starter ventilation 

On soft starters installed with a cooling fan, the fan is factory set to switch on automatically as soon as the heatsink temperature reaches 

46°C (114.8°F). 

It is switched off when the heatsink temperature falls back to 43°C (109.4°F). This behavior can be mo dified by adjusting the FAn parameter 

in IO menu on page 61. 

Fan flow rates 

(1)Cubic Feet / Minute 

Mounting in a General Purpose Metal Enclosure 

Observe the mounting recommendations on the previous page. 

To help proper air circulation in the soft starter: 

• Install ventilation grilles. 

• Verify that ventilation is adequate: if not install a forced ventilation unit, with a 

filter if necessary. 

Derate the soft starter current IcL by 2.2% per °C for temperatures above 40°C up to 

60°C (104°F up to 140°F). 

18 

Reference Frame 

size 

Unit Standard With optional fan kit 

110 V 230 V 110 V 230 V 

SH31-7.5, 15.0, 22.0 A m 3 /hour - - 28 31 

CFM (1) - - 16 18 

SH31-30.0, 37.0, 45.0 B m 3 /hour - - 28 31 

CFM (1) - - 16 18 

SH31- 55.0, 75.0, 90.0 C m 3 /hour - - 108 108 

CFM (1) - - 64 64 

SH31-110, 132, 160, 200 D m 3 /hour 148 148 - - 

CFM (1) 87 87 - - 

SH31-250, 315 E m 3 /hour 148 148 - - 

CFM (1) 87 87 - -

Mounting 

Mounting in a dust and damp-proof metal enclosure 

Ventilation for dust and damp- proof enclosure 

Follow the instructions in this section in order to meet NEMA Type 12 (IP54) degree of protection. 

Do not use insulated or non-metallic enclosures as they have poor thermal conduction. Provide a stirring fan to circulate air inside the 

enclosure and to help prevent hot spots in the soft starter. This allows operation of the soft starter in an enclosure with a maximum internal 

temperature of 60°C (140°F). Ensure that the ambien t temperature around the soft starters does not exceed this limit. 

Derate the soft starter current IcL by 2.2% per °C for temperatures above 40°C up to 6 0°C (104°F up to 140°F). 

Thermal considerations for sizing enclosures 

When mounting the SH31 soft starter in an enclosure, use the enclosure manufacturers’ recommendations for proper sizing based on 

thermal considerations. For this, it is necessary to sum the power dissipated by each device in the enclosure. Table hereafter lists the steady 

state and starting power dissipations for the SH31 soft starter, operating at rated current. 

Power dissipated by the soft starters, at their nominal current 

Soft starter 

reference 

θ°i = internal ambient temperature 

θ°e = external ambient temperature 

Power Control supply 

Frame 

size 

IcL During starting 

total power 

at 3.5 IcL 

SH31-7.5/4/6 A 17 208 5 

SH31-15.0/4/6 A 32 404 10 

SH31-22.0/4/6 A 47 562 14 

SH31-30.0/4/6 B 62 781 19 

SH31-37.0/4/6 B 75 1016 23 

SH31-45.0/4/6 B 88 1060 26 

SH31-55.0/4/6 C 110 1345 33 

SH31-75.0/4/6 C 140 1548 42 

SH31-90.0/4/6 C 170 1922 51 

SH31-110/4/6 D 210 2596 63 

SH31-132/4/6 D 250 3275 75 

SH31-160/4/6 D 320 3699 96 

SH31-200/4/6 D 410 5147 123 

SH31-250/4/6 E 480 6396 144 

SH31-315/4/6 E 590 7599 177 

Steady state 

total power 

bypass 

Electronics Shorting 

contactors 

(1) 

A W W W W W 

(1)For SH31-.../4, SH31-.../6 and US edition, frame sizes A, B and C the shorting contactor power is included in the electronics. 

(2)Optional fan kit 

Fans 

20 - 14 (2) 

20 - 20 (2) 

20 - 20 (2) 

20 14 20 

20 14 40 

Example: for an SH31-22.0/4/6 Example: for an SH31-250/4/6 

Power dissipated during starting: 562 W 

Power dissipated in steady state: 14 W 

Power for Control supply: 20 W without fan, 34 W with fan 

Power dissipated during starting: 6396 W 

Power dissipated in steady state: 144 W 

Power for Control supply: 74 W 

19

Mounting - Fan option 

Fan for frame sizes A, B and C 

Connections between the fan and the SH31 

SH31-.../4 or SH31-.../6 Fan 230 V 

SH31-.../& in US edition Fan 110 V 

20 

Tightening torque: 3.5 N·m (31 lb.in) 

* As 2 different fan options could be connected to the SH31 

according to the fan voltage (matching the SH31 control 

voltage), the connector is different according to the voltage, to 

help avoid wrong assembly and misuse. 

(1) The voltage of the fan has to match the control voltage of 

the soft starter:

Mounting - Fan option 

Fan dimensions for frame sizes SH31-7.5 to 90.0 


Fan kit SH31- a b k e H G G1 X D Weight 

A 

B 

C 

7.5 

15.0 

22.0 

30.0 

37.0 

45.0 

55.0 

75.0 

90.0 

mm 

(in.) 

130 

(5.1) 

145 

(5.7) 

150 

(5.9) 

mm 

(in.) 

265 

(10.4) 

295 

(11.6) 

350 

(13.8) 

mm 

(in.) 

40 

(1.6) 

40 

(1.6) 

40 

(1.6) 

mm 

(in.) 

8.5 

(0.33) 

8.5 

(0.33) 

8.5 

(0.33) 

mm 

(in.) 

248 

(9.8) 

278 

(10.9) 

333 

(13.1) 

(1) The voltage of the fan has to match the control voltage of the soft starter. 

SH31-.../4 or SH31-.../6 Fan 230V 


mm 

(in.) 

100 

(3.9) 

115 

(4.5) 

120 

(4.7) 

mm 

(in.) 

65 

(2.6) 

80 

(3.1) 

85 

(3.3) 

mm 

(in.) 

250 

(9.8) 

276 

(10.9) 

331 

(13) 

mm 

(in.) 

7 

(0.28) 

7 

(0.28) 

7 

(0.28) 

kg 

(lb) 

1.2 

(2.6) 

1.4 

(3.1) 

1.6 

(3.5) 

21

Thermal protection 

Soft starter thermal protection 

The thermal protection is provided by the temperature sensor installed on the heatsink. 

Motor thermal protection 

Standard IEC 60947-4-2 defines the protection classes giving the starting capacities of the motor (warm or cold start) without thermal faults. 

Different protection classes are given for a COLD state (corresponding to a stabilized motor thermal state, switched off) and for a WARM 

state (corresponding to a stabilized motor thermal state, at nominal power). 

22 

• The soft starter is factory set to protection class 10. 

• This protection class can be modified using tHP parameter in SEt menu. 

• The motor thermal state is stored in memory. No estimate of motor cooling is calculated while power of the control part is off. 

• An overload alarm is activated if motor thermal state exceeds 110%. 

• A thermal trip OLF stops the motor if motor thermal state exceeds 125%. 

• If the thermal protection has not been disabled, the thermal trip can be indicated by a relay depending on output assignment. 

• After the motor has stopped or the soft starter has been switched off, the thermal state is saved. At next start or switch on, the thermal 

protection value is restored. 

• If a special motor is used (explosion proof, submersible, etc.), the thermal protection should be provided by PTC probes. 

RISK OF DAMAGE TO THE MOTOR 

See Motor thermal protection with PTC probes, page 25. 

CAUTION 

The use of external overload protection is required under the following conditions: 

• Running multiple motors 

• Running motors rated at less than 40% of the nominal soft starter current 

• Using motor switching 

• Using special motor (explosion proof, submersible, etc...) 

Failure to follow these instructions can result in equipment damage.


Cold curves 

t (s) 

Trip time for a standard application 

(class 10) 

Trip time for a severe application 

(class 20) 

Class 30 

Class 20 

Class 10 


(class 30) 

3.5 In 3.5 In 3.5 In 

32 s 63 s 95 s 

23


Warm curves 

24 

t (s) 

Trip time for a standard application 

(class 10) 


(class 20) 

Class 30 

Class 20 

Class 10 


(class 30) 

3.5 In 3.5 In 3.5 In 

16 s 32 s 48 s


Motor thermal protection with PTC probes 

PTC probes integrated in the motor to measure its temperature can be connected to the control card terminals. 

Note: 

PTC probe protection does not deactivate the motor thermal protection provided by the soft starter calculation. Both types of protection can 

operate in parallel. 

PTC wiring 

(1) Shielded cable is optional. 

Characteristics 

(1) 

Total resistance of the probe circuit: 750 Ω at 25°C (77°F). 

Tripping: between 2700 Ω and 3100 Ω. 

25

Wiring 

Installation Precautions 

Good wiring practice requires the separation of control circuit wiring from all power (line and load) wiring. Power wiring to the motor must 

have the maximum possible separation from all other power wiring. Do not run them in the same conduit. This separation reduces the 

possibility of coupling electrical noise between circuits. 

Follow these precautions when installing the SH31 soft starter: 

• Voltage and frequency specifications for the input line must match the soft starter configuration. 

• A disconnect switch must be installed between the input line and the soft starter. 

26 


















• The solid state switches of the SH31 soft starter’s power circuit do not provide complete isolation from the AC line. Due to leakage 

currents through the solid-state switches, hazardous voltages can be present on the soft starter load-side power circuit whenever 

power is applied to the line side of the soft starter. 

• Disconnect all power before servicing the soft starter or motor. 


• When using an isolation contactor, the contactor must close before or at the same time as the application of the soft starter run 

command. If line power is not detected at the L1, L2, and L3 terminals of the soft starter within 500 ms of this run command, a Phase 

Failure trip will occur. 

• External overcurrent protection devices (OCPD), either fuses or a circuit breaker, must be installed on the line-side connections of 

the SH31 soft starter. The maximum recommended OCPD rating, along with the associated soft starter short circuit withstand rating, 

is listed on page 84.

Wiring 

INADEQUATE OVERCURRENT PROTECTION 

WARNING 

• An overcurrent protective device must be installed on the line-side of the SH31 to achieve published short-circuit withstand ratings. 

• Do not exceed the maximum overcurrent protective device ratings shown on page 84. 

• Do not connect the soft starter to a power feeder whose short circuit capacity exceeds the soft starter short circuit withstand rating 

shown on page 84. 


• Power factor correction capacitors should not be connected to a motor controlled by an SH31 soft starter. If power factor correction 

is required, the capacitors must be located on the line-side of the soft starter. A separate contactor should be used to switch the 

capacitors off when the motor is off, or during acceleration and deceleration. Refer to bulletin No 8638PD9603. 

RISK OF DAMAGE TO THE SOFT STARTER 

CAUTION 

• Do not connect power factor correction capacitors to the load-side power circuit of the SH31. 

• Do not connect loads other than motors (for example transformers and resistors are forbidden). 


• The SH31 uses solid-state power switches to control motor power. When checking the condition of conductor or motor insulation, do 

not connect the high potential dielectric test equipment or insulation resistance tester to the soft starter since the test voltages used 

may damage the soft starter. Always disconnect the soft starter from the conductors or motor before performing such tests. 


CAUTION 

• Do not perform high potential dielectric tests on circuits while the circuits are connected to the SH31 soft starter. 

• Any circuit requiring high potential dielectric tests must be disconnected from the soft starter prior to performing the test. 


• The SH31 contains electronic circuitry to detect and signal when the solid-state switches have become inoperable. 

• Since the solid-state switches may be incapable of completely blocking the motor power should the soft starter detect a fault, auxiliary 

isolation on the line side of the soft starter is required. Use either a circuit breaker equipped with a shunt trip coil or an electromagnetic 

contactor. Connect the isolation device to the detected fault relay of the soft starter so that it opens the soft starter power circuit in the 

event of a soft starter trip. The isolation device must be capable of interrupting motor locked rotor current. 

27

Wiring 

Refer to application diagrams that display the logic controlling the isolation device via the detected fault relay. 

System Grounding 

If system grounding is not adequate to handle ground trip levels which can exceed 1300% of motor full load amps (Motor FLA), then this 

device may not protect the branch circuit conductors. In this case, external ground trip protection must be properly coordinated. 

Recommended solutions include: 

• Time delay fuses coordinated to 125% of motor FLA. The fuses listed in the chapter Branch circuit protection are sized to provide 

proper coordination and may be used for applications that do not require start times longer than 50 seconds at 300% current limit or 

20 seconds at 500% current limit. 

• External overload relay. For multi-motor applications, applications in which motor does not match the soft starter size, or applications 

that use a full voltage bypass scheme, an external overload relay can be coordinated to protect conductors from a high-impedance 

ground trip. 

General wiring practices 

When wiring SH31 soft starter, follow the wiring practices required by national and local electrical codes. In addition, follow these 

guidelines: 

• Use metallic conduit for all soft starter wiring. Do not run control and power wiring in the same conduit. 

• Separate metallic conduits carrying power wiring or low-level control wiring by at least 80 mm (3 in). 

• Separate non-metallic conduits or cable trays used to carry power wiring from metallic conduit carrying low-level control wiring by at 

least 305 mm (12 in). 

• Always cross power and control wiring at right angles. 

• Keep the control circuits away from the power cables. 

Adaptation to line input 

The control circuit is completely independent of the power circuit. To apply control voltage, follow the instructions on the label located on 

the soft starter terminal strip. Connect single phase voltage of 110 or 230 Vac supply to terminals CL1 and CL2. 

The power circuit adapts automatically to the input line voltage and frequency over a range of 230 to 440 V for SH31-.../4 soft starters, and 

over a range of 208 to 600 V for SH31-.../6 soft starters. 

28 

MOTOR OVERHEATING HAZARD 

CAUTION 

If the solid-state switches on the SH31 become inoperable, single-phase operation of the motor can result. 

• Use an isolation device consisting of either a circuit breaker equipped with a shunt trip coil or an electromagnetic contactor to open 

the line-side of the soft starter. 

• The isolation device must be capable of interrupting the motor locked rotor current. 

• Connect the detected fault relay of the soft starter to open the isolation device in the event of a soft starter trip. 

Failure to follow these instructions can result in injury or equipment damage. 

WARNING 

INADEQUATE SYSTEM GROUNDING- BRANCH CIRCUIT CONDUCTOR HAZARD 

If system grounding is not adequate for ground fault levels, use properly coordinated external ground fault protection. Possible solutions 

include: 

• Time delay fuses coordinated to 125% of motor FLA. 

• A properly coordinated external overload relay. 

Failure to follow these instructions can result in death, serious injury, or equipment damage.

Wiring 

Power Requirements 

Connect the control supply (CL1-CL2), ensuring that it is off, according to the model number of the soft starter. 

SH31-.../4 

and 

SH31-.../6 

SH31-.../6 

US edition 

Connect the power line supply (1/L1-3/L2-5/L3), ensuring that it is off, according to the model number of the soft starter. 

SH31-.../4 

SH31-.../6 and 

US edition 

230 V +10% 

220 V –15% 

115 V +10% 

110 V –15% 

230 V 

440 V 

208 V 

600 V 

Connect the motor (2/T1 - 4/T2 - 6/T3), ensuring that its coupling corresponds to the supply voltage. 

Note: If the SH31-.../4 is used inside delta connection, follow the recommendations on page 12, and the diagrams on page 30. 

Bypass contactor 

+10% –15% 

+10% –15% 

An internal bypass contactor is integrated into all SH31 soft starters. 

The bypass contactor is activated when : 

I motor < 120% In 

AND 

U motor = 100% input line voltage 

Block diagram of the power part of the SH31 

SH31-.../4 range SH31-.../6 and US edition 

29

Wiring 

The SH31-.../4 range (230-440 V) can be connected in the motor supply line or inside delta connection of the motor. 

The SH31 in line connection 

The motor connection depends on the supply voltage. Two possibilities are shown below: star connection and delta connection. 

The SH31 connected inside delta connection 

30 

SH31 

Motor 

Star connection Delta connection 

SH31 

Motor 

CAUTION 


• Only the SH31-.../4 range can be installed inside delta connection. 

• Ensure connection exactly as shown on the example. 

• Line voltage should not exceed 440 V. 

• The parameter dLtA must be set to dLt. 


Note: Phase sequence must be 1 - 2 - 3

Wiring 

The SH31.../4 connected inside delta connection 

SH31-.../4 soft starters can be inserted inside delta connection of the motor. 

Only the SH31-.../4 range can be installed inside delta connection. Set the parameter dLtA to dLt. 

See the tables on page 12 for more information about soft starter-motor combinations. 

Note: To reverse the direction of the motor as shown on the figure: 

- reverse the two outputs U1 and V1, 

- reverse the two inputs L1 and L3. 

31

Wiring - power terminals 

Power 

Observe the cable cross-sectional areas recommended in the standards. 

The soft starter must be grounded to conform to the regulations concerning leakage currents. If the installation involves several soft starters 

on the same line, each soft starter must be grounded separately. 

Keep the power cables separate from circuits in the installation with low-level signals (sensors, PLCs, measuring devices, video, telephone). 

Cage style connectors for frame sizes A and B 

Power connections, minimum and maximum wiring capabilities, tightening torque 

(a) The cable gauge affects the IP protection of the soft starter. To keep IP20 value with a connected cable on frame B, the minimum cable 

gauge is: 16 mm² or 4 AWG. 

Allen key, supplied with size B products 

32 

1L1 3L2 5L3 

Frame 

size 

Rdy 

Com 

Ground connection bottom view 

Run 

Trip 

2T1 4T2 6T3 

Ground connection 

2/T1 4/T2 6/T3 

Ground connections, screw size 

Frame size Screw 

A M6 

B M6 

C M6 

D M10 

E M10 

SH31- IEC cable UL cable 

1/L1 3/L2 5/L3 and 2/T1 4/T2 6/T3 

power supply and output to motor 

1/L1 3/L2 5/L3 and 2/T1 4/T2 6/T3 


Size Tightening torque Strip Gauge Tightening torque Strip 

min. max min. max 

length 

min. max min. max 

length 

mm² mm² N·m N·m mm AWG AWG lb·in lb·in in. 

A 7.5, 15.0, 22.0 2.5 16 3 3 10 12 4 26 26 0.4 

B 30.0, 37.0, 45.0 4 (a) 50 10 10 15 10 (a) 1/0 89 89 0.6 


FIRE HAZARD DUE TO LACK OF TIGHTENING TORQUE 

• Ensure correct connector tightening torque for power terminals. 

• For size B, use the Allen key provided with the product. 

Failure to follow these instructions will result in death or serious injury.


Bus bar connections for frame sizes C to E 

Frame 

Size 

Depth 

SH31- 1/L1 3/L2 5/L3 and 2/T1 4/T2 6/T3 


For more details, see Dimensions and weights paragraph page 14. 

Ground connection 

Width 

Bar Cable and cover 

Width Depth Bolt Size Gauge Cover Tightening torque 

mm (in.) mm (in.) M mm² MCM Ref N·m lb·in 

C 55.0, 75.0, 90.0 20 (0.79) 5 (0.2) 8 (0.31) 95 250 LA9F702 18 159 

D 110, 132, 160, 200 30 (1.18) 5 (0.2) 12 (0.47) 2x150 2x250 LA9F703 57 503 

E 250, 315 40 (1.57) 5 (0.2) 12 (0.47) 2x240 2x500 LA9F703 57 503 

33


Power connections, minimum required wiring section 

315 2 x 185 2 x 500 MCM 

(1)at max ambient temperature of 40°C (104 °F) 

34 

Frame Size SH31 IEC cable 

mm² (Cu 70°C/158 °F) (1) 

A 7.5 2.5 10 

15.0 6 8 

22.0 10 6 

B 30.0 16 4 

37.0 25 3 

45.0 35 2 

C 55.0 35 1/0 

75.0 50 2/0 

90.0 70 4/0 

D 110 95 300 MCM 

132 120 350 MCM 

160 185 2 x 3/0 

200 2 x 150 2 x 250 MCM 

E 250 2x 150 2 x 350 MCM 

UL cable 

AWG (Cu 75°C/167 °F) (1)

Wiring - control terminals 

Electrical characteristics for SH31-.../4 and SH31-.../6 ranges (230 Vac with 24 Vdc logic input) 

Terminal Function Characteristics 

CL1 

CL2 

SH31 control power supply 

230 Vac +10% 

220 Vac -15% 

R1B 

R1C 

R1A 

R2B 

R2C 

R2A 

Relay1 normally closed 

Relay1 common 

Relay1 normally open 


Relay2 common 


Max switching capability: 

5 A- 250 Vac or 30 Vdc on resistive load ( p.f. =1) 

2 A-250 Vac or 30 Vdc on inductive load ( p.f.=0.4) 

Minimimal commutation capability: 

100 mA 12 Vdc 

LI1 Logic input 1 3 x 24 V logic inputs with 4.3 kΩ impedance 

LI2 Logic input 2 

Umax = 30 V, Imax = 8 mA 


state 1: U>11 V - I>5 mA 

+24 Vdc Float 24 Vdc(+) (1) 

state 0: U


Electrical characteristics for SH31-.../6 in US edition (110 Vac with 110 Vac logic inputs) 

Terminal Function Characteristics 

CL1 

CL2 

SH31 control power supply 110 Vac +10% -15% 

R1B 

R1C 

R1A 

R2B 

R2C 

R2A 


Relay1 common 



Relay2 common 


Max switching capability: 

5 A- 250 Vac or 30 Vdc on resistive load ( p.f. =1) 

2 A-250 Vac or 30 Vdc on inductive load ( p.f.=0.4) 

Minimimal commutation capability: 

100 mA 12 Vdc 

LI1 Logic input 1 3 x 110 V logic inputs with 20 kΩ 


impedance 


Umax = 121 Vac, Imax = 5 mA 

NC Not connected 

state 1: U>79 V - I>2 mA 

state 0: U


Types of command 

LI1 stop behavior 

LI1 assignment is stop and cannot be changed by HMI or serial link. 

This input is active on level (Low level (0) = stop). 

RUN and START management 

RUN and START can only be assigned to LI2 (not LI3). 

In 2-wire control 

On power-up or on manual trip reset, the motor will restart if the RUN command is present. 

Control 

supply 

LI2 

Motor 

In 3-wire control 

On power-up or a manual trip reset or after a stop command, or a change of assignment, the motor can only be powered once the START 

input has been opened (state 0) followed by a new pulse (state 1). 

When switching from remote command to local command, with Run order present on the terminal control, the motor doesn’t start in 3-wire 

control: need to remove Run order and apply it again. 

Control 

supply 

Motor 

37

Wiring - in line connection - application diagram 

SH31-.../4 and SH31-.../6: 230 Vac control, logic Inputs (LI) 24 Vdc, 3-wire control 

(1)Check the operating limits of the contact, for example when connecting to high rating contactors. See “Electrical characteristics” page 35. 

(2)Select a voltage transformer in accordance with the mains voltage. 

3-wire control setting 

In the menu Advanced I/O COP, set the following parameters: 

38 

Parameter Value Description 

LI2 Strt Logic Input 2 is set to start 

r2 trlP Trip relay is de-energized upon trip


SH31.../4 and SH31-.../6: 230 Vac control, logic Inputs (LI) 24 Vdc, 

2-wire control, freewheel stop 


(2)Insert a voltage transformer if the power voltage is higher than the SH31 acceptable value. Characteristics: min 100 VA page 13. 




LI2 rUn Logic Input 2 is set to Run 

r2 trlP Trip relay is de-energized upon trip 

Note: For UL508 schematics, see page 82. 

39


SH31-.../6 in US edition: 110 Vac control, Logic Inputs (LI) 110 Vac, 3-wire control 





40 


LI2 Strt Logic Input 2 is set to start 



SH31-.../6 in US edition: 110 Vac control, Logic Inputs (LI) 110 Vac, 2-wire control, 

freewheel stop 







r2 trlP Trip relay is de-energized upon trip 

Note: For UL508 schematics, see page 83. 

41

Display terminal 

Functions of the keys and the display 

Selection process 

The selection process takes you through three levels: 

1-Scroll to a parameter menu and press the ENT key. 

2-Scroll to a specific parameter and press the ENT key. 

3-Scroll to a value and press the ENT key to save the value. A 

parameter value becomes valid and takes effect immediately, before 

you press the ENT key. 

This means that, if for example you increase the current limit during 

the start process, the motor current will increase immediately (until 

15 seconds maximum). Once you find the correct value, you can 

either decide to store it (press the ENT key) or return the SH31 to its 

previous value (press the ESC key), or wait 15 seconds. 

Special key combinations 

Special keys combinations are used as shortcuts, see below. 

42 

4 signalizing LEDS 

ESC 

Exits to the previous level 

Scroll backward 

Key combination Description 

ESC + 

ESC 

+ 

+ 

+ 

+ 

Displays UtIL menu (Utility) 

Clear the trip message and reset the soft starter 

Soft starter not locked (see Cod parameter) 

4 x seven segment display 

Scroll forward 

ENT 

Enters the menu or parameter, or saves 

the displayed parameter value 

Parameter menu 

ESC ENT 

Parameter 

ESC ENT 

Value 

Save value 

ENT

Display terminal 

LED’s display 

The front cover of the control board contains four LEDs above the seven segment display that display the SH31 status and activity. 

Name Location Description 

Rdy Green - front cover 

Com Green - front cover 

Run Yellow - front cover 

Trip Red - front cover 

NOTE: see LED parameter, page 78. 

LEDs included inside the seven segment display 

Name Location Description 

Example: LCr1= 88 A 

ON = line and control supplied 

OFF = no voltage on control 

Flashing = control supplied but no power line nrdY or Snb reached 

ON = Modbus status OK; Communication present. 

OFF = Modbus status not OK 

ON = motor runs at full voltage and bypass contactor on 

OFF = motor stopped 

Flashing = ACC or DEC phase 

ON = trip with immediate stop 

OFF = no problem 

Flashing = alarm warning - no stop 

LCr1 Led upper left 7 segments Current phase 1 display 

LCr2 Led middle left 7 segments Current phase 2 display 

LCr3 Led down left 7 segments Current phase 3 display 

Note: When the soft starter is inside delta connection, LCr1, LCr2, LCr3 values are current inside the windings. The line current = LCr x 3. 

43

Remote keypad display - option 

The remote keypad IP54 or the remote keypad IP65 can be mounted on the door of the wall-mounted or floor-standing enclosure with a 

seal which offers IP65 protection. Any display restrictions applied to the soft starter by the remote terminal switch will still be in force once 

the soft starter has been disconnected and even after it has been switched off. 

Note: Set the remote keypad with 

• Modbus rate = 19.2 Kbps, (see tbr) 

• Modbus format = 8E1, 8 bit, even parity, 1 stop bit (see For) 

44 

RJ45 

connector 

Cable 1m or 3m 

1L1 3L2 5L3 

Rdy 

Com 

Run 

Trip 

2T1 4T2 6T3 

RJ45 

connector

Programming 

Programming and setup 

Preliminary recommendations 


WARNING 

• The designer of any control scheme must 

- consider the potential failure modes of control paths and, for certain critical control functions, 

- provide a means to achieve a safe state during and after a path failure. 

Examples of critical control functions are emergency stop and overtravel stop. 

• Separate or redundant control paths must be provided for critical control functions. 

• System control paths may include communication links. Consideration must be given to the implications of unanticipated 

transmission delays or failures of the link. (1) 

• Each implementation of an SH31 soft starter must be individually and thoroughly tested for proper operation before being placed into 

service. 


(1)For additional information, refer to NEMA ICS 1.1 (latest edition), “Safety Guidelines for the Application, Installation, and Maintenance 

of Solid State Control”. 

When changing the factory configuration, record your parameter settings in the Parameter Index and Modbus addresses table, starting 

page 77. 

45

Programming 

Menu structure 

Two menu levels are provided. 

"Easy start up" level - factory setting 

Access to basic parameters which define the characteristics of the application to manage: acceleration ramp, boost level. 

"Advanced level" 

Access to dedicated parameters which define the characteristics of the motor protections, interface, communication,… 

This selection will add some menus and, in the particular case of Monitoring menu, it will add some parameters. 

Menu selection: "Easy start up" level or "Advanced" level 

1. Scroll up or down using the forward and backward keys until you reach conF menu and press the ENT key. This enters Configuration 

menu. 

2. Scroll up or down using the forward and backward keys until you reach LAC setting in conF menu and press the ENT key. 

3. Select the desired parameter (oFF for the easy start up level or On for the advanced level) then press the ENT key. Repeat for each 

level of submenus and parameters until you reach the desired parameter and value. 

4. Press the ENT key to save the value. 

Note: A parameter value becomes valid and takes effect immediately upon changing its value. If ESC is pressed, the value previously stored 

in the EEPROM is restored. 

Menu description 

(1)Status displays the state of the soft starter: rdY nrdY rUn. 

See next page for Status menu. 

46 

Easy start up level Advanced level 

Status (1) 

conF 

SEt 

Actual Data 

Configuration 

Settings 

SUP 

Advanced 

monitoring 

Status (1) 

conF 

SEt 

AdJ 

SEt2 

PrO 

IO 

COP 

SUP 

UtIL Utility 

Actual Data 

Configuration 

Settings 

Advanced 

adjustments 

Advanced 

Settings 

Advanced 

protections 

Advanced 

I/O 

Advanced 

communication 

Advanced 

monitoring

Programming 

Status and actual data monitoring 

Status Actual data 

USF 

nrdY 

rdY 

rUN 

ACC 

Note: When the soft starter is inside delta connection, LCr1, LCr2, LCr3 values are current inside the windings. 

The line current = LCr x 3. 

Status Description 

ACC During acceleration 

For the trip codes, see chapter Diagnostics / Troubleshooting page 75. 

Current phase 1 display, value in Amp 



Logic input status: 

1=logic input ON Example: LI3 ON, LI2 OFF, LI1 OFF 

0=logic input OFF 

Logic Output relays status (r2 and r1): 

1=relay ON Example: R2 ON, R1 OFF 

0=relay OFF 

tbS The soft starter has tripped in SnbF, too many starts, see Diagnostics/Troubleshooting page 76. 

dEC During deceleration 

LCr1 

LCr2 

LCr3 

nrdY A stop command is present, with line and control power on 

LI1 = 0 and LI2 = 1 in 2-wire control 

LI1 = 1 and LI2 = 1 at power up in 3-wire control 

Or main power is switched off 

rdY Soft starter is ready to start 

rUn Steady state, the bypass contactor is closed 

LI 

Lo 

47

List of parameters 

Parameters access control 

48 

• R (Read): parameter value on read ONLY. 

• R/W (Read/Write): Parameter value can be changed when motor is running (except during soft start and soft stop when command is 

given by Modbus). 

• R/W* (Read/Write): parameter value can be changed only when the soft starter is stopped. 

Code Description R/W Code Description R/W 

Actual data PrO Advanced Protections (continued) (1) 

LCr1 Current phase 1 display (p. 47) R PHr Phase sequence (p. 57) R/W* 

LCr2 Current phase 2 display (p. 47) R PHL Phase loss detection (p. 58) R/W 

LCr3 Current phase 3 display (p. 47) R USd Under voltage threshold (p. 58) R/W 

LI Logic input status (p. 47) R USt Under voltage time delay (p. 58) R/W 

Lo Logic Output relays status (p. 47) R OSd Over voltage threshold (p. 59) R/W 

OSt Over voltage time delay (p. 59) R/W 

conF Configuration PtC PTC probes motor monitoring (p. 59) R/W 

IcL Soft starter rated current (p. 50) R ItH Overload protection (p. 59) R/W* 

dLtA Connection type (line or delta) (p. 50) R/W* 

Uln Line voltage (p. 50) R/W IO Advanced IO (1) 

In Motor rated current (p. 50) R/W* LI2 Logic input 2 (p. 60) R/W* 

Cod Setting lock (p. 50) R/W LI3 Logic input 3 (p. 60) R/W* 

LAC Advanced mode (p. 50) R/W r1 Relay 1 (p. 61) R/W* 

r2 Relay 2 (p. 61) R/W* 

SEt Settings FAn Fan management (p. 61) R/W 

t90 Initial voltage (p. 51) R/W 

ILt Current limit (p. 51) R/W COP Advanced communication (1) 

tLS Max start time (p. 51) R/W Add Modbus address (p. 62) R/W* 

ACC Acceleration time (p. 52) R/W tbr Modbus baudrate (p. 62) R/W* 

dEC Deceleration time (p. 52) R/W For Modbus format (p. 62) R/W* 

EdC End of deceleration (p. 52) R/W ttO Modbus time out (p. 62) R/W* 

tHP Motor thermal protection (p. 52) R/W CtrL Command channel (p. 62) R/W* 

AdJ Advanced level (1) SUP Advanced monitoring 

Snb Number of starts (p. 53) R/W StPr Last starting time (p. 63) R 

SLG Starts period (p. 53) R/W SICL Last start maximum current (p. 63) R 

bSt Boost time (p. 53) R/W LFt Last trip (p. 63) R 

SSC Start-stop control (p. 54) R/W* dICL Trip current (p. 63) R 

SPCU Start-stop profile control voltage (p. 54) R/W* rnt Total run time (p. 63) R 

Stnb Total number of starts (p. 63) R 

SEt2 Advanced settings (1) dEFt Total number of trips (p. 63) R 

t92 2nd initial voltage (p. 55) R/W dEF1 Trip history 1 (p. 63) R 

ILt2 2nd current limit (p. 55) R/W dEF2 Trip history 2 (1) (p. 63) R 

ACC2 2nd acceleration time (p. 55) R/W dEF3 Trip history 3 (1) (p. 63) R 

dEC2 2nd deceleration time (p. 55) R/W dEF4 Trip history 4 (1) (p. 63) R 

In2 2nd motor rated Current (p. 55) R/W* dEF5 Trip history 5 (1) (p. 63) R 

dEF6 Trip history 6 (1) (p. 63) R 

PrO Advanced Protections (1) dEF7 Trip history 7 (1) (p. 63) R 

UId Under current threshold (p. 56) R/W dEF8 Trip history 8 (1) (p. 63) R 

UIt Under current time delay (p. 56) R/W dEF9 Trip history 9 (1) (p. 63) R 

OId Overcurrent threshold (p. 56) R/W 

OIt Overcurrent time delay (p. 57) R/W UtIL Utility (2) 

Ubd Unbalance threshold (p. 57) R/W tESt Soft starter self test (p. 64) R/W* 

Ubt Unbalance time delay (p. 57) R/W UdP Soft starter software version (p. 64) R 

Grdd Ground leakage current threshold (p. 57) R/W FCS Back to factory settings (p. 64) R/W* 

Grdt Ground leakage current time delay (p. 57) R/W rPr Reset of trip history and counters (p. 64) R/W* 

(1)Only available when Advanced mode LAC page 50 is set to 

On 

(2) Accessible, except motor in run state, using the key shortcut 

ESC +

Parameter settings 

Structure of parameter tables 

Parameter tables contain the descriptions of the various menus and are exploitable as well with the remote terminal and with the integrated 

terminal. 

Example: 

Code Name/Description R/W Adjustment range Factory setting 

conF 2 Configuration menu 

5 

dLtA • Connection type R/W* 6 

Line 

LInE 

dLt 

- In line connection 

- Inside delta connection 

Uln • Line voltage 

4 

3 

Set to the nominal voltage of the mains. 

1. Menu name 

2. Menu code on display 

3. Description of the parameter and complementary information 

4. Parameter code on display 

5. Parameter value code(s) on display 

1 

R/W Q range: 

200 to 440 V 

S6-S6U ranges: 

200 to 600 V 

7 Q range: 8 

400 V 

S6-S6U ranges: 

480 V 

6. Access control: 

• R (Read): parameter value on read ONLY 

• R/W (Read/Write): parameter value can be changed when 

motor is running (except during soft start and soft stop when 

command is given by Modbus). 

• R/W* (Read/Write): parameter value can be changed only 

when the soft starter is stopped. 

• Write (R/W): parameter value can be changed when the soft 

starter is running 

7. If any, adjustment range of the parameter 

8. Factory setting of the parameter, if write is possible the 

parameter can be modified by the user. 

49

Configuration menu (ConF) 

*: Write only when the soft starter is stopped 

50 


conF Configuration menu 

IcL • Soft starter rated current R According to the soft 

starter rating 

Maximum rated continuous current of the soft starter (see pages 11 to 84). 

IcL value is on the soft starter nameplate (Soft starter FLA). Read only parameter between 17 A and 590 A. 

dLtA • Connection type 

LInE 

dLt 

CAUTION 


• This parameter must be set in accordance with the wiring type, see page 30. 

• When dLtA is set to dLt: 

- Only the SH31-.../4 range can be installed inside delta connection. 

- Ensure connection exactly as shown page 30. 

- Line voltage should not exceed 440 V. 


Uln • Line voltage 

- Line: in line connection 

- Inside delta connection of the motor. 

Parameters automatically set when dLtA = dLt 

Parameter Set Description 

code value 

bSt 0 Boost time, see page 53 

SSC oFF Start-stop control, see page 54 

SPCU 0 Start-stop profile control voltage, see page 54 

PHr 123 Phase sequence, see page 57 

EdC inactive End of deceleration, see page 52 

R/W* LInE 

R/W /4 range: 

200 to 440 V 

/6 range: 

200 to 600 V 

/4 range: 

400 V 

/6 range: 

480 V 

Set to the nominal voltage of the mains. 

Note: Improper setting may cause unnecessary tripping, because Uln is the reference for over voltage and under 

voltage protections. 

In • Motor rated current 

Cod • Setting lock 

nLOC 

LOC 

R/W* 0.4 IcL 

up to IcL 

• Soft starter in line connection:In = rated current of the motor. 

• Soft starter inside delta connection:In = rated current of the motor / √3. 

R/W nLOC 

According to the 

soft starter rating 

(pages 11 to 22) 

Used to enable or disable parameters modification on the displays. 

- not locked: all R/W parameters can be modified. Also accessible with key combination 

- locked: all parameters are read only on local display or remote keypad display (the parameters can be 

still modified by serial link and BLEMOsoft software). 

LAC • Advanced mode 

oFF 

On 

R/W oFF 

Allows you to access to the Advanced level, see page 46 for detailed description. 

- off: Easy start up level 

- on: Advanced level 

Note: It also allows to display a longer trip history list: 

LAC set to oFF: Total number of trips dEFtand Trip history 1 dEF1, page 63. 

LAC set to On: Total number of trips dEFt and Trip history 1 dEF1 to Trip history 9 dEF9, page 63.

Settings menu (SEt) 


SEt Settings menu 

t90 • Initial voltage R/W 10..50% of full 

voltage, by 

increment of 5 

Sets the motor’s initial starting voltage. 

Initial voltage should be set in order to produce motor rotation as soon as the voltage is applied to the motor. 

If set too low, the motor will rotate later after the "Run" signal. 

Voltage% 

Run 

ILt • Current limit 

Time (s) 

30% 

t90 is set by increment of 5 with the HMI. 

And t90 is set by increment of 1 only with the communication 

network. 

R/W 200..700% of In with 

max 350% of IcL 

Set the motor current limit applied during the soft start. 

With the maximum load, the ILt should be set to a high enough value to allow motor start. 

Current limit is not operating during Run and Soft stop. 

ILt 

Time (s) 

350% 

If the application requires more 350% IcL, the soft starter must be 

oversized. 

CAUTION 


By communication network, do not set ILt above 350% of IcL. 


tLS • Max start time R/W 1..250 s 15 s 

Set the maximum start time. The time calculation is between the "start" order and "Run" Led light on (motor runs at 

full voltage and bypass contactor on). 

Used to prevent a longer start time than expected. 

Note: Check that ACC is lower than tLS. 

Example: jammed motor 

If the starting time exceeds the value of tLS, the Soft starter displays StF “Too Long StartTime” trip, page 76. 

51

Settings menu (SEt) 

52 


SEt Settings menu (continued) 

ACC • Acceleration time R/W 1..60 s 10 s 

Determines motor’s voltage ramp up time, if SSC is set to OFF. 

Determines motor’s torque ramp up time, if SSC is set to ON. 

Run command 

dEC • Deceleration time R/W FrEE, 1...60 s Free 

1 to 60 

FrEE 

Determines motor’s voltage ramp down time, if SSC is set to OFF. 

Determines motor’s torque ramp down time, if SSC is set to ON. 

- Deceleration time 

- Freewheel deceleration 

% 

Run 

EdC • End of deceleration 

Time(s) 

R/W 0..10 0 

Threshold for changing to freewheel stop mode at the end of deceleration. 

Soft deceleration will end when the estimated torque falls below the EdC value. 

Note: Edc is inactive when dLtA = dLt. In this case, EdC value is not used and is not relevant. 

Motor 

voltage 

tHP • Motor thermal protection 

10 

20 

30 

dEC 

Freewheel 

Time(s) 

Motor 

voltage 

R/W 10 

To select the class of motor thermal protection, see explanations and curves page 22. 

- IEC class 10 

- IEC class 20 

- IEC class 30 (heavy duty) 

Note: To activate the Motor thermal protection, set ItH to ErUn or On, page 59 

Freewheel

Advanced adjustments menu (AdJ) 


AdJ (1) Advanced adjustments menu 

Snb • Number of starts R/W oFF, 1..10 oFF 

Limiting the number of soft starts and soft stops during an adjustable period of time. This period is set with SLG. 

When the number of soft starts and soft stops is above the Snb value, during SLG period, the trip message is SnbF 

or tbS. 

Example 1: Snb = 6, SLG = 30 min and dEC = Free 

6 starts are allowed in 30 min period. If you do 7 starts, you will have SnbF trip message. 

Example 2: Snb = 6, SLG = 30 min and dEC = 10 

3 starts and 3 stops are allowed in 30 min period. If you do 4 starts, you will have SnbF trip message. 

SLG • Starts period 

See Snb above. 

bSt • Boost time 

(1)Only available when Advanced mode LAC page 50 is set to On. 


R/W 1..60 min 30 min 

R/W 0.0 .. 1.0 

by increment of 0.1 

0 (no pulse) 

Intended to start high friction loads that require high starting torque for a short time. 

A pulse of 80% Uln, without current limit, is initiated to break the load free. Pulse duration is adjustable, 0.1 – 1sec. 

After this pulse, the voltage is ramped down to the initial voltage setting, before ramping up again to full voltage 

according to start parameters settings. 

Voltage % 

Run 0.1 to 1s 

Note: bSt is inactive (=0) when dLtA = dLt. In this case, bSt value is not used 

and is not relevant. 

0.1 s on keypad becomes 1 with Modbus (1/10th s value with Modbus). 

Time (s) 

53

Advanced adjustments menu (AdJ) 



54 


AdJ (1) Advanced adjustments menu (continued) 

SSC • Start-stop control R/W* On 

On 

oFF 

- On : Acceleration ACC and deceleration dEC are controlled by torque. 

When SSC=On the soft starter will set automatically the Start-stop profile control voltage, SPCU 

DEACTIVATED. 

This configuration is suitable for most of the applications, and especially pumps. However, other controls 

are available with SPCU (activated when SSC=oFF) 

- Off 

Note: SSC is set to oFF when dLtA =dLt. In this case, SSC value is not used and is not relevant. 

SPCU • Start-stop profile control voltage R/W* 0 

0 

1 

2 

3 

Acceleration and deceleration are controlled by voltage variation 

Note: SPCU is forced to "profile 0" when dLtA = dLt. SPCU is inactive When SSC = On. 

In these cases, SPCU values are not used and are not relevant. 

- Start-stop profile 0: open loop with simple voltage ramp-up. 

- Start-stop profile 1 



Profiles 1, 2 and 3, are controlling voltage ramp-up with reduction of the over-torque at the end of starting. 

Advice : evaluate behavior on the application from profile 0 up to profile 3. If the application is instable, come back 

to the previous profile. 

Torque 

Parameters affected when SSC = oFF 

Parameter 

code 

Status Description 

ACC controlled by Acceleration time, see page 52. 

dEC voltage variation Deceleration time, see page 52. 

SPCU active Start-stop profile control voltage 

time

Advanced settings menu (SEt2) 


SEt2 (1) Advanced settings menu 

SEt2 allows you to have a 2nd set for the 5 parameters below. 

These parameters have the same definition as SEt. 

They can be validated with 2 possibilities: 

• Remotely by communication. 

• With logic input. 

t92 • 2nd initial voltage R/W 10..50 % of full voltage 

Uln, by increment of 5 

Same as Initial voltage t90 page 51. 

ILt2 • 2nd current limit 

Same as Current limit ILt page 51. 


R/W 200..700 of In2 with max 

350% IcL 

ACC2 • 2nd acceleration time R/W 1..60 s 10 s 

Same as acceleration time ACC page 52. 

dEC2 • 2nd deceleration time R/W FrEE, 1..60 s FrEE 

Same as deceleration time dEC page 52. 

In2 • 2nd motor rated Current 

Same as motor rated current In page 50. 

30% 

350% 

R/W* 0.4 IcL up to IcL According to the soft 

starter rating (see 

pages 11 to 22) 

55

Advanced protections menu (PrO) 


56 


PrO (1) Advanced protections menu 

UId • Under current threshold R/W Off, 20..90 (%In) oFF 

Trips the soft starter when motor current drops below set level for a time longer than under current time delay (UIt). 

Active in running state. 

Note: Trip message is UCF. 

Current (A) 

UCF 

trip message 

Time (s) 

UIt • Under current time delay R/W 

Adjusts the time delay linked with the parameter under current threshold UId. 

OId • Overcurrent threshold 

1..40 s 

by increment of 1 s 

R/W 100..300 (%In) 

by increment of 5 

10 s 

200% 

Trips the soft starter when motor current rises above a set level for a time longer than overcurrent time delay (OIt). 

Active in running state. 

Note: Trip message is OCF. 

Current (A) 

OCF 

Trip message 

Time (s)



PrO (1) Advanced protections menu (continued) 

OIt • Overcurrent time delay R/W 

Adjusts the time delay linked with the parameter OId. 



0.0 .. 5.0 

by increment of 0.1 

Ubd • Unbalance threshold R/W Off,10..100 (% of In) 25 

Trips the soft starter in case of motor current unbalance, between 2 or 3 phases. 

This is depending also to the soft starter range. 

This is linked with the unbalance time delay Ubt. 

Adjusts the motor current unbalance. Combined with unbalance delay Ubt. 

Note: Trip message is PHbd. 

Ubt • Unbalance time delay 

Adjusts the time of unbalance threshold Ubd. 

Grdd • Ground leakage current threshold 

Only in the SH31-.../6 ranges 

Automatically set to oFF on SH31-.../4 range 

Combined with Ground leakage current time delay (Grdt). 

Note: Trip message is GrdF. 

Grdt • Ground leakage current time delay 

Adjusts time delay of ground leakage current threshold Grdd. 

R/W 1..60 s 

by increment of 1 

0.5 s 

10 s 

R/W Off, 10..100 % of In 25 for S6 and S6U 

oFF for Q 

R/W 1..60 s 5 s 

PHr • Phase sequence R/W* oFF 

321 

123 

oFF 

- 3 2 1: reverse (L3 - L2 - L1) 

- 1 2 3: Forward (L1 - L2 - L3) 

- Off: not monitoring 

If the line phases are not in the order confugured, the soft starter trips and displays PIF. 

Note: When dLtA is set to dLt (the soft starter is connected Inside delta connection), PHr is forced to 123. 

In this case, PHr value is not used and is not relevant. 

57



(2)Only available by Modbus. 

58 



PHL • Phase loss detection R/W* On 

On 

oFF 

Manage the input (or line) phase loss controls. 

- on 

- off 

Note: Trip message is PHF. 

USd • Under voltage threshold R/W 50..90 (% of ULn) 70% 

Trips the soft starter when the voltage drops below the set level for a time longer than under voltage time delay 

(USt). 

Line voltage (V) 

Note: 

Becomes operational only after start signal. When voltage drops to zero (voltage outage), the soft starter will trip 

immediately, overriding the delay. Trip message is USF. 

USt • Under voltage time delay R/W 1..10 5 s 

Adjusts the time of under voltage threshold USd. 

Time 

(s)




OSd • Over voltage threshold R/W* 110..125% of Uln 120% 

Trips the soft starter when mains voltage increases above the set level for a time longer than over voltage time 

delay (OSt). 

Line voltage (V) 



Time 

(s) 

Note: Trip message is OSF. The trip appears only after a Run command. 

OSt • Over voltage time delay R/W 1..10 2 s 

Trips the soft starter when mains voltage increases above the set level for a time longer than overvolt delay. 

Note: Trip message is OSF. 

PtC • PTC probes motor monitoring R/W oFF 

oFF 

On 

The PTC probes on the motor must be connected to the correct analog input (see page 25). 

This protection is independent of the Motor thermal protection tHP. 

Both types of protection can be used simultaneously. 

- off (No PTC probes are not activated) 

- on (PTC probes activated. Wire the probes) 

Note: Trip message is OtF. 

ItH • Overload protection R/W* On 

oFF 

ErUn 

On 

ItH determines if and when the overload protection is active 

- off: the overload protection is disabled 

- Erun: the overload protection is enable only during the steady state (rUn) 

- On: the overload protection is always enable. 

Note: Trip message is OLF.ItH set to oFF resets the thermal state of the motor when the soft starter is stopped. 

CAUTION 

RISK OF DAMAGE TO THE SOFT STARTER AND THE MOTOR 

• When ItH = oFF, it is recommended to use PtC probes to protect the motor against overheating. 

• When ItH = ErUn, it is recommended to set tLS to the maximum start time of the installation, to protect the 

installation in case of motor stalling. 


59

Advanced IO menu (IO) 



60 


IO (1) Advanced IO menu 

LI2 • Logic input 2 R/W* rUn 

Strt 

rUn 

2nd 

EtF 

rSt 

FAn 

FI 

LIL 

- start: for a 3-wire control 

- run: for a 2-wire control 

- 2nd: 2nd set of parameters 

- EtF: external detected fault 

- rSt: remote reset 

- FAn: fan control 

- FI: trip inhibition: assigned after a continuous press of ENTER key during 2s. 

- LIL: Forced local command (by control terminals) 

Note: the modification will be taken into account only at the next control power on. 


LOSS OF PERSONNEL AND EQUIPMENT PROTECTION 

• Enabling Logic input to FI will disable the soft starter protection features, except PIF, PHF, SCF, CFF, trAP. 

• It should not be enabled for typical applications of this equipment. 

• It should be enabled only in extraordinary situations where a thorough risk analysis demonstrates that the 

presence of soft starter protection poses a greater risk than personnel injury or equipment damage. 


LI3 • Logic input 3 R/W* rSt 

2nd 

EtF 

rSt 

FAn 

FI 

LIL 

- 2nd: 2nd set of parameters 

- EtF: external detected fault 

- rSt: remote reset 

- FAn: fan control 

- FI: trip inhibition: assigned after a continuous press of ENTER key during 2s. 

- LIL: Forced local command (by control terminals) 


LOSS OF PERSONNEL AND EQUIPMENT PROTECTION 


• Enabling Logic input to FI will disable the soft starter protection features, except PIF, PHF, SCF, CFF, trAP. 

• It should not be enabled for typical applications of this equipment. 

• It should be enabled only in extraordinary situations where a thorough risk analysis demonstrates that the 

presence of soft starter protection poses a greater risk than personnel injury or equipment damage. 

Failure to follow these instructions will result in death or serious injury.

Advanced IO menu (IO) 


IO (1) Advanced IO menu (continued) 

r1 • Relay 1 R/W* nStP 

StPd 

nStP 

Strt 

rUn 

rdY 

trIp 

ALr 





It is mandatory that: 

- One of the relay (R1 or R2) must be set to trIP. 

- Relay R1 or R2 set to trip must be wired as shown on page 38 through 41. 


- stopped - Relay is energized at stop 

- not stopped - Relay is not energized at stop and is energized at all other times 

- starting - Relay is energized during the start process until the bypass contactor is closed 

- running - Relay is energized when the bypass contactor is closed 

- ready - Relay is energized when the soft starter is ready to be started (mains is connected, no trip and 

the maximum number of starts (Snb) is not reached) 

- trip - Relay is de-energized in case of trip 

- alarm - Relay is de-energized upon alarm, Overload alarm: thermal state of overload protection is above 

110%. 

Note: An alarm indicates the presence of non critical event. 

r2 • Relay 2 R/W* trIP 

Same as r1. 

FAn • Fan management R/W AUto 

AUto 

On 

oFF 

HAnd 

- auto: the soft starter manages automatically the fan. 

- on: always on 

- off: always oFF 

- Hand: manual Fan is controlled by a Logic input (LI2 or LI3) 


CAUTION 

When FAn is set to oFF or HAnd, ensure that the soft starter mets the mounting recommendations described 

page 18. 


61

Advanced communication menu (COP) 


*: Write only when the soft starter is stopped. 

62 


COP Advanced communication menu 

Add • Modbus address R/W* 1..247 oFF 

oFF 

1 to 247 

- off 

- Modbus address 


tbr • Modbus baudrate R/W* 4.8, 9.6, 19.2 Kbps 19.2 Kbps 


With the remote keypad, set 19.2 Kbps 

For • Modbus format R/W* 8E1 

8o1 

8E1 

8n1 

8n2 

- 8 bit, odd parity, 1 stop bit 

- 8 bit, even parity, 1 stop bit 

- 8 bit, no parity, 1 stop bit 

- 8 bit, no parity, 2 stop bit 


With the remote keypad, set 8E1 

ttO • Modbus time out 

Note: 0.1s on keypad becomes 1 with Modbus (1/10th s value with Modbus). 

Trip message is SLF. 


WARNING 

R/W* 0.1..60.0 s 5.0 s 

Check that the selection of Modbus time out will not endanger personnel or equipment in any way. 

Failure to follow this instruction can result in death or serious injury or equipment damage. 

CtrL • Command channel R/W* LCL 

LCL 

dbS 

- local command: with the control terminals 

- remote command: Modbus 

Note: During soft start and soft stop, parameters values written by Modbus are not taken into account. 

LI1 must be activated (LI1 = 1) to allow the remote command.

Advanced monitoring menu (SUP) 

Code Name/Description R/W Range 

SUP Advanced monitoring menu 

StPr • Last starting time R 0-999 s 

Starting time is the duration to start the motor. 

SICL • Last start maximum current 

Displays last starting maximum current. 

LFt • Last trip 

Displays last trip message. See trip codes page 75. 

dICL • Trip current 

Displays motor current value upon last trip. 

rnt • Total run time 

Displays motor total run time. 

Stnb • Total number of starts 

Displays total number of starts. 

dEFt • Total number of trips 

Displays total number of trips. 

dEF1 • Trip history 1 

Displays the trip message occurred before LFt. 


(1) Displays the trip message occurred before dEF1. 
















R 0-999 A 

R - 

R 0-999 A 

R hours 

R - 

R - 

R - 

R - 

R - 

R - 

R - 

R - 

R - 

R - 

R - 

63

Utility menu (UtIL) 


(1) Accessible, except motor in run state, using the key shortcut 

64 


UtIL (1) Utility menu 

tESt • Soft starter self test R/W* On oFF 

Result 

Good 

BAd. Possible causes : 

- Improper internal voltage, 

- Checksum error, 

- Disconnected keyboard, 

- Disconnected heatsink thermal sensor, 

- Disconnected bypass relay (frame size C). 

If the detected fault persists, contact BLEMO product support. 

UdP • Soft starter software version R 0000..9999 

Two first digits: version 

Two last digits: sub version 

FCS • Back to factory settings R/W* 



Check that the modification of the current configuration is compatible with the wiring diagram used. 


After press "Enter", SUrE is displayed. After press "Enter", parameters go back to factory settings. 

rPr • Reset of trip history and counters R/W* 

ESC + 

After press "Enter", SUrE is displayed. After press "Enter", trip history and counters are reset (rnt, dEF1 to dEF9 

in the SUP menu).

Command channel 

Command channel: local or remote command 

A command channel gives the possibility to command the motor by the soft starter (start, stop…). 

it can also read or write parameters. 

In local command mode, the SH31 can be set from the display terminal: 

• Use the 4 keys to enter into the menu. 

In remote command, the SH31 soft starter can be set from the remote keypad: 

• The remote keypad can be used in a similar way than the embedded keypad, it means that the HMI on the remote keypad has the 

same behavior as the HMI on the product. 

Note: Some command channels can also read or write parameters. 

Keypad 

In this example, LI3 is configured to forced local command (LIL). 

If CtrL = Modbus + forced local: it’s forced local in first. 

or 

PLC 

Modbus 

Priority stop 

Active channel 

CtrL 

configuration parameter 

(CtrL = Modbus) 

LOCAL mode: The soft starter is entirely controlled via the terminals. The parameters can be read and written via Modbus. The soft starter 

remains in LOCAL mode as long as the CtrL = 0. 

FORCED LOCAL mode: The soft starter is entirely controlled via the terminals. Write access to the parameters from the Modbus link is 

prohibited. Reading is possible. 

Note: LI1 must be activated (LI1 = 1) to allow the remote command. 

A switch can be used on LI1 if a local stop by the terminal is needed. In this case, the stop will be in freewheel. 

Soft starter 

command 

Forced local: 

LI3= LIL 

or 

Command word, bit 15 = 1 

65


Behavior on channel change 

In the COP menu (Advanced communication), the active channel can be changed via CtrL parameter: 

CtrL parameter is a configuration parameter that can be modified when the motor is stopped. 

In the IO menu (Advanced IO), a Logic input can be assigned to local command: : 

The local remote input is active at level 1. 

When the input local remote is active, the active command channel is the local channel. 

When the local force function is active from a Logic input, the parameters can only be written by the local HMI or the external keypad. If 

written by Modbus function 6 or 16, the exception 1 bad function is sent back. 

When the local force function is active Modbus command word, parameters can be written also by Modbus. 

The Logic input assign to "Forced local command" has the priority on bit 15 from Modbus command word. If LI3 is assigned to LIL and 

LI3=1, even if bit 15=1 the "Forced local command" is active. 

When CTRL = Modbus and LI force local command activated, then a Modbus request 6 or 16 sends back an exception code 1 illegal 

function. 

When on Modbus, only LI1 stop is taken into account. 

Command word 

The control register write definition is changed as follows: 

The SH31 incorporates one control register intended for controlling the SH31. 

Address: The control register address is: 752. 

In order to control the SH31 using the control register: 

• Use Function 16 or function 6 

• Use Address_High (page) = 2 

• Use Address_Low = 240 (0F0H) 

• Write to one register only 

• Set comm_control (CtrL) to 1 for Modbus 

66 

Code Name Range Default value 

CtrL command channel 0: local command 

1: Remote command: Modbus 

Code Name Value 

LI2 

or LI3 

Logic input 2 

or logic input 3 

Bit Function Comment 

LIL: Forced Local command 

bit 0 RUN/STOP Write "1" (On) to RUN 

Write "0" (oFF) to STOP, in configured stop (DEC parameter) 

bit 1 reserved 


bit 3 trip reset Write "1" to reset 







bit 10 Freewheel stop Write "1" to set freewheel deceleration, linked with bit 0 

bit 11 2nd set of parameters Write "1" to enable second set of parameters 




bit 15 Forced local command Write "1" (On) forces local command 

0


Status word 

The Status register address is: 256 

• Use Function 3 only 

• Use Address_High (page) = 1 

• Use Address_Low = 0 (00H) 

• Read one register only 

Bit Function Comment 

bit 0 Ready 

bit 1 On 

bit 2 Trip A trip condition exists. 

bit 3 Warning A warning condition exists. 

bit 4 Reserved 

bit 6 LI2 

bit 7 LI1 

bit 8 

bit 9 

bit 10 

bit 11 

bit 12 

bit 13 

(Motor current in %) 

bit 14 Local control 

All the conditions that will permit the operation of a switching device by the remote host controller have 

been fulfilled. 

The main circuit contacts are closed or the semiconductor switches of semiconductor switching device 

are in the conducting state (ACC, DEC and BYPASS). 

The motor current is expressed as a percentage of the motor rated current. 

Range is 0-200%. 

6 bits code 

200% = 63 (decimal) = 111111 (binary) 

The indication to a remote host controller that as a result of operator intervention, commands received 

will not be accepted or acted upon (forced local command). 

bit 15 Ramping Accelerating or decelerating the motor. 

67

Modbus Function 

This section describes the connection to the bus or network, signaling, diagnostics, and configuration of the communication-specific 

parameters via the 7-segment LED display. 

It also describes the communication services of the Modbus protocol. 

Modbus Protocol 

The transmission mode used is RTU mode. The frame contains no message header byte, nor end of message bytes. 

It is defined as follows: 

The data is transmitted in binary code. 

CRC16: cyclical redundancy check. 

The end of the frame is detected on a silence greater than or equal to 3 characters. 

Principle 

The Modbus protocol is a master-slave protocol. 

Master Only one device can transmit on the line at any time. 

The master manages the exchanges and only it can take 

the initiative. 

It interrogates each of the slaves in succession. 

No slave can send a message unless it is invited to do so. 

The master repeats the question when there is an incorrect 

exchange, and declares the interrogated slave absent if no 

response is received within a given time period. 

If a slave does not understand a message, it sends an 

exception response to the master. The master may or may 

not repeat the request. 

Slave i Slave j Slave k 

Direct slave-to-slave communications are not possible. 

For slave-to-slave communication, the application software must therefore be designed to interrogate a slave and send back data received 

to the other slave. 

Two types of dialogue are possible between master and slaves: 

• the master sends a request to a slave and waits for its response 

• the master sends a request to all slaves without waiting for a response (broadcasting principle) 

Addresses 

• The soft starter Modbus address can be configured from 1 to 247. 

• Address 0 coded in a request sent by the master is reserved for broadcasting. SH31 take account of the request, but do not respond to it. 

Supported Modbus functions 

The SH31 supports the following Modbus functions. 

68 

Slave 

address 

Request code Data CRC16 

Function name Code Description Remarks 

Read holding registers 03 

16#03 

Write one output word 06 

16#06 

Write multiple registers 16 

16#10 

(Sub-function) 

Read device Identification 

43 

16#2B 

Read N output words Max PDU length : 63 words 

Write one output word 

Write N output word Max PDU length : 61 words 

Read device identification


The following paragraphs describes each supported function. 

Read Holding registers 

Request 

Function code 1 Byte 0x03 

Starting Address 2 Bytes 0x0000 to 0xFFFF 

Quantity of Registers 2 Bytes 1 to 63 (0x 3F) 

Response 


Byte count 1 Byte 2 x N* 

Register value N* x 2 Bytes 

*N: Quantity of Registers 

Error 

Error code 1 Byte 0x83 

Exception code 1 Byte 01 or 02 or 03 or 04 (see details on 

page 72) 

Example 

Note: Hi = high order byte, Lo = low order byte. 

This function can be used to read all SH31 words, both input words and output words. 

Request 

Slave 

no. 

Response 

Example: read 2 words 'ACC and DEC at Modbus address 19 and 20 to W3105 (16#0013 to 16#0014) in slave 2, using function 3, where: 

• ACC - Acceleration = 10 

• DEC - Deceleration = 0 

03 No. of first word Number of words CRC16 

Hi Lo Hi Lo Lo Hi 

1 byte 1 byte 2 bytes 2 bytes 2 bytes 

Slave 

no. 

03 Number of 

bytes read 

First word value ------- Last word value CRC16 


1 byte 1 byte 1 byte 2 bytes 2 bytes 2 bytes 

Request 02 03 0019 0002 CRC16 

Response 02 03 04 000A 0000 CRC16 

Value of: W0019 W020 

Parameters: ACC DEC 

69


Write one output word 

Request 

Response 

Error 

Example 

Request and response (the frame format is identical) 

Example: write value 16#0008 in word W0022 (16#2329) in slave 2 Snb Number of starts 8. 

70 


Register Address 2 Bytes 0x0000 to 0xFFFF 

Register value 2 Bytes 0x0000 to 0xFFFF 


Register Address 2 Bytes 0x0000 to 0xFFFF 

Register value 2 Bytes 0x0000 to 0xFFFF 

Error code 1 Byte 0x86 

Exception code 1 Byte 01 or 02 or 03 or 04 (see details on 

page 72) 

Slave 

no. 

06 Word number Value of word CRC16 


1 byte 1 byte 2 bytes 2 bytes 2 bytes 

Request and response 02 06 0016 0008 CRC16


Read Device Identification 

ID Name / Description Type 

0x00 VendorName ASCII String 

0x01 ProductCode ASCII String 

0x02 MajorMinorRevision ASCII String 

Example 

Default values to be detailed 

Request 

Slave 

no. 

Response 

2B Type of MEI 

0E 

The total response size equals 49 bytes 

ReadDeviceId 

01 

Object Id 

00 

The three objects contained in the response correspond to the following objects: 

CRC16 

Lo Hi 

1 byte 1 byte 1 byte 1 byte 1 byte 2 bytes 

Slave 

no. 

2B Type of MEI 

0E 

ReadDeviceId 

01 

Degree of conformity 

02 

1 byte 1 byte 1 byte 1 byte 1 byte 

------- Number of additional frames 

00 

------- Id of object no. 1 

00 


01 


02 

------- CRC16 

Next object Id 

00 

Note: The response to function 43 may be negative; in this case, the response located at the top of the next page is sent by the SH31 rather 

than the response described above. 

------- 

Number of objects 

03 

1 byte 1 byte 1 byte 

Length of object no. 1 

12 

Value of object no. 1 

“BLEMO” 

1 byte 1 byte 18 bytes 


0B 


“SH31XXXXXX” 



04 


“0201” 


Lo Hi 

1 byte 1 byte 

• Object no. 1: Manufacturer name (always “BLEMO”, ie. 18 bytes). 

• Object no. 2: Device reference (ASCII string; for example: “SH31XXXXXX”, ie. 11 bytes). 

• Object no. 3: Device version, in “MMmm” format where “MM” represents the determinant and “mm” the subdeterminant (4-bytes 

ASCII string; for example: “0201” for version 2.1). 

------- 

------- 

------- 

------- 

71


Error management 

Exception responses 

An exception response is returned by a slave when it is unable to perform the request which is addressed to it. 

Format of an exception response: 

Response code: request function code + 16#80. 

Error code: 

1 = The function requested is not recognized by the slave 

2 = The bit or word addresses indicated in the request do not exist in the slave 

3 = The bit or word values indicated in the request are not permissible in the slave 

4 = The slave has started to execute the request but cannot continue to process it completely 

CRC16 calculation 

The CRC16 is calculated on all the message bytes by applying the following method: 

Initialize the CRC (16-bit register) to 16#FFFF. 

Enter the first to the last byte of the message: 

The CRC obtained will be transmitted with the low order bytes sent first, followed by the high order ones (unlike the other data contained in 

Modbus frames). 

XOR = exclusive OR. 

72 

Slave 

no. 

Response 

code 

Error 

code 

CRC16 

Lo Hi 

1 byte 1 byte 1 byte 2 bytes 

End enter 

CRC XOR —> CRC 

Enter 8 times 

End enter 

Move the CRC one bit to the right 

If the output bit = 1, enter CRC XOR 16#A001—> CRC

Connection to RS485 bus 

Standard schematic 

The standard schematic corresponds to the Modbus specification published on the Modbus.org site in 2002 

(Modbus_over_serial_line_V1.pdf, Nov 2002) and in particular to the schematic of the 2-wire multidrop serial bus. 

The SH31 follows this specification. 

Schematic diagram: 

Master 

Slave 1 Slave n 

Type of trunk cable Shielded cable with 1 twisted pair and at least a 3 rd conductor 

Maximum length of bus 1000 m at 19200 bps 

Maximum number of stations (without 

repeater) 

32 stations, ie. 31 slaves 

Maximum length of tap links • 20 m for one tap link 

• 40 m divided by the number of tap links on a multiple junction box 

Bus polarisation • One 450 to 650 Ω pulldown resistor at 5 V (650 Ω recommended) 

• One 450 to 650 Ω pulldown resistor at the Common (650 Ω recommended) 

This polarization is recommended for the master. 

Line terminator One 120 Ω 0.25 W resistor in series with a 1 nF 10 V capacitor 

Common polarity Yes (Common), connected to the protective ground at one or more points on the bus 

73

Maintenance 

Servicing 

It is advisable to perform the following actions regularly: 

• Check the condition and tightness of connections. 

• Ensure that the temperature around the unit remains at an acceptable level and that ventilation is effective (average service life of 

fans: 3 to 5 years depending on the operating conditions). 

• Ensure proper fan operation. 

• Remove any dust from the soft starter. 

• Check physical damages to the soft starter. 

Spare parts and repairs 

Consult BLEMO products support. 

74

Diagnostics / Troubleshooting 

Soft starter does not start, no trip code displayed 

• No display: 

- check that the line supply is present on the control supply CL1/CL2, 

- check if a short circuit is not existing on the Modbus network cable (especially between RJ45 pin 7 and RJ45 pin3 or pin8. See 

pages 35 and 36). 

• Check that the code displayed does not correspond to the normal state of the soft starter (see page 46). 

• Check for the presence of the RUN/STOP commands (see page 37). 

Soft starter does not start, trip code displayed 

• Trip code flashes on the display. 

• Storing of the last 7 trips, visible with BLEMOsoft software. 

• The soft starter locks and the motor stops with to freewheel mode. 
















Trip code 

displayed 

Name Remedy 

bPF Bypass contactor detected fault • Check for a welded bypass contactor or shorted SCR 

• Replace it if necessary 

CFF Invalid configuration on power-up • Revert to the factory setting in the soft starter UtIL menu 

• Reconfigure the soft starter 

EtF External detected fault • Clear the cause of the detected fault 

GrdF Ground leakage current detected 

fault 

• Check the electrical insulation of the motor 

• Check the installation 

• Check the values of Grdd, Grdt parameters in PrO menu page 57 

InF Internal detected fault • Disconnect and reconnect the control supply. If the detected fault persists, contact 

BLEMO product support 

OCF Motor overcurrent • Check the values of OId and OIt parameters in PrO menu page 56 

OHF Over heat detected fault • Check the sizing of the soft starter in relation to the motor and the mechanical 

requirement 

• Check the operation of the fan (if the SH31 used has one), ensuring that the air 

passage is not obstructed in any way and the heatsink is clean. Ensure that the 

mounting recommendations are observed 

• Wait for the SH31 cooling before restarting 

OLF Overload motor • Check the mechanism (wear, mechanical play, lubrication, blockages, etc.) 

• Check the sizing of the soft starter motor in relation to the mechanical requirement 

• Check the value of tHP parameter in SEt menu page 52 andIn parameter in conF 

menu page 50 

• Wait for the motor to cool before restarting 

OSF Overvoltage • Check ULn parameter in conF menu 

• Check the power supply circuit and voltage 

• Check OSd and OSt parameters in PrO menu 

DtF Motor Over Temperature 

• Motor thermal trip detected by 

the PTC probes 

• Check the mechanism (wear, mechanical play, lubrication, blockages, etc.) 


• Check the value of PtC setting in PrO menu page 59 

• Wait for the motor to cool before restarting 

75

Diagnostics / Troubleshooting 

Remote keypad messages 

76 

Trip code 

displayed 

Name Remedy 

PHbd Phase unbalance • Check the line voltage. 

• Check the values of Ubd, Ubt parameters in PrO menu page 57. 

PHF Loss of a line phase • Check the line voltage, the connection to the soft starter and any isolating devices 

located between the line and the soft starter (contactors, fuses, circuit breakers, etc.). 

• Check the motor connection and any isolating devices located between the soft 

starter and the motor (contactors, circuit breakers, etc.). 

• Check the motor state. 

Line frequency, out of tolerance 

This detected fault can be 

configured in PrO menu 

PIF Phase inversion 

Line phase inversion does not 

conform to the selection made by 

PHr in PrO menu 

• Check the line frequency. 

• Check the configuration of PHL. 

• Invert two lines phases or set PHr = oFF. 

trAP Trap code • Disconnect and reconnect the control supply. If the detected fault persists, contact 

BLEMO support. 

SCF Short circuit: 

• short-circuit on soft starter 

output 

• Switch the soft starter off. 

• Check the connecting cables and the motor insulation. 

• Check the thyristors. 

• Check the bypass contactor (contact stuck). 

SLF Modbus Time Out • Serial link detected fault. Check the RS485 connection. 

SnbF Too many starts • The number of soft starts has exceeded the maximum allowed by Snb in SLG period. 

See Snb page 53. 

SSCr Shorted thyristor or wrong 

connection 

StF Starting time detected fault 

• Too long start time 

• Check the thyristors. 

• Check the bypass contactor (contact stuck). 

• Check the motor connections. 

• Check the mechanism (wear, mechanical play, lubrication, blockages, etc.) 

• Check that tLS (Max start time) is bigger than ACC (Acceleration time). See SEt 

menu page 51. 


• Check ILt value : if the value is too low, the motor may not reach acceleration and full 

speed. 

tbS Too many starts • Wait 5 minutes for frame size A. 

• Wait 15 minutes for frame sizes B, C, D and E. 

tbS appears after SnbF trip message, when trying to reset the soft starter before end of 

the timer. 

UCF Motor underload (undercurrent) • Check the values of UId and UIt parameters in PrO menu page 57. 

USF Under voltage or no voltage • Check UIn, USd and USt parameters in PrO menu 

• Check line voltage. 

Display Message Description 

InIt On initializing itself Microcontroller initializing. 

Communication configuration searching. 

COME flashing Communication 

interruption 

It has 50 ms time out. 

This message is shown after 20 times retrying. 

A-17 flashing Key alarm • Key has been held consecutively more than 10 seconds. 

• Membrane switch disconnected. 

• Keypad waked up while a key is holding. 

CLr flashing Confirm trip reset This is shown when : 

First time STOP key has been pressed while the soft starter has tripped in detected 

fault. 

dEUE flashing Soft starter mismatch Soft starter type (brand) did not match with keypad type (brand). 

rOME flashing ROM trip Keypad ROM detected fault. 

rAME flashing RAM trip Keypad RAM detected fault. 

CPUE flashing CPU trip Keypad CPU detected fault.

Parameter Index and Modbus addresses 

Code Page Name Unit 

Modbus 

code and 

Adjustment 

Range (1) 

Description 

(1) Modbus code = Soft starter message 

example : oFF on the soft starter will be equivalent to "0" with Modbus protocol (remote command) 

* : parameter visible only with Modbus 

Modbus 

address 

ACC 52 Acceleration time s 1 to 60 - 19 10 

ACC2 55 2nd acceleration time s 1 to 60 - 42 10 

Add 62 Modbus address - 

0 = oFF 

1 to 247 

off 

Modbus address 

Factory 

setting 

80 oFF 

bSt 53 Boost time s 0.0 to 1.0 1 with Modbus = 0.1s 34 0 

Cod 50 Setting lock - 

CtrL 62 Command channel - 

dEC 52 Deceleration time s 

dEC2 55 2nd deceleration time s 

0 = nLOC 

1 = LOC 

0 = LCL 

1 = dbS 

0 = FrEE 

1 to 60 

0 = FrEE 

1 to 60 

not locked 

locked 

0 – Local (LCL) 

1 – Modbus (dbS) 

freewheel deceleration 

- 

freewheel deceleration 

- 

4 nLoc 

84 LCL 

20 FrEE 

43 FrEE 

dEF1 63 Trip history 1 - 

01 = UCF 

02 = OCF 

01 = Motor underload (undercurrent) 

02 = Motor overcurrent 

282 - 

03 = PHbd 03 = Phase unbalance 

dEF2 63 Trip history 2 - 04 = GrdF 04 = Ground leakage current detected 

fault 

283 - 


05 = OLF 

06 = OtF 

05 = Overload motor 

06 = Motor Over Temperature 

284 - 

07 = OHF 07 = Over heat detected fault 

dEF4 63 Trip history 4 - 08 = PIF 08 = Phase inversion 

285 - 

09 = PHF 09 = Loss of a line phase 


10 = USF 

11 = OSF 

10 = Under voltage or no voltage 

11 = Over Voltage 

286 - 

12 = StF 12 = Starting time detected fault 

dEF6 63 Trip history 6 - 13 = SnbF 13 = Too Many Starts 

287 - 

14 = SSCr 14 = Shorted thyristor or wrong connection 


15 = EtF 

16 = InF 

15 = External detected fault 

16 = Internal detected fault 

288 - 

17 = SLF 17 = Modbus Time Out 

dEF8 63 Trip history 8 - 18 = trAp 18 = Trap code 

289 - 

19 = SCF 19 = Short-circuit 

dEF9 63 Trip history 9 - 20 = bPF 

21 = CFF 

20 = Bypass contactor detected fault 

21 = Invalid configuration on power-up 

290 - 

dEFt 63 Total number of trips - - - 278 - 

dICL 63 Trip current A 0 to 999 - 280 - 

dLtA 50 Connection type - 

0 = LInE 

1 = dLt 

in line connection 

inside delta connection 

1 LInE 

EdC 52 End of deceleration - 0 to 10 - 21 0 

FAn 61 Fan management - 

FCS 64 

Back to factory 

settings 

0 = AUto 

1 = On 

2 = oFF 

3 = HAnd 

auto 

on 

off 

manual 

76 AUto 

- 1 = 1 to perform FCS 130 - 

User 

setting 

77





78 


For 62 Modbus format - 

Modbus 

code and 

Adjustment 

Range (1) 

0 = 8o1 

1 = 8E1 

2 = 8n1 

3 = 8n2 

Description 

8 bit, odd parity, 1 stop bit 

8 bit, even parity, 1 stop bit 

8 bit, no parity, 1 stop bit 

8 bit, no parity, 2 stop bit 

Modbus 

address 

Factory 

setting 

82 8E1 

Freq* Frequency Hz - - 265 - 

Grdd 57 

Grdt 57 

IcL 50 

Ground leakage 

current 

threshold 

Ground leakage 

current time 

delay 

Soft starter 

rated current 

% 

ofIn 

10 to 100 

101 = oFF 

IG* Integral gain % 0 to 100% 

ILt 51 Current limit 

ILt2 55 2nd current limit 

In 50 

In2 55 

ItH 59 

Motor rated 

current 

2nd motor rated 

Current 

Overload 

protection 

- 

Off 

54 

25 for S6 

and S6U 

OFF for Q 

s 1 to 60 - 55 5 

A - - 0 

% 

ofIn 

% 

ofIn 

LAC 50 Advanced mode - 

200 to 700% 

max. value: 

350% of IcL 

200 to 700% 

max. value: 

350% of IcL 

This parameter is reserved for 

expert mode. 

Active when SSC = On 

Read from 

the power 

card’s serial 

EEPROM 

38 20 

- 17 350 

- 41 350 

A 0.4 IcL to IcL - 3 

A 0.4 IcL to IcL - 44 

- 

0 = oFF 

1 = rUn 

2 = On 

0 = oFF 

1 = On 

LCr1 47 LCr1 Phase 1 Current, Amp 257 



LED* LEDS Status 

off 

run 

on 

off 

on 

d4: COMM LED (0=OFF,1=ON) 

d6: Ready LED (0=OFF,1=ON) 

d7: Run LED (0=OFF,1=ON). Flashing during soft start 

/ soft stop. 

d8: Trip LED (0=OFF,1=ON) 

Note: other bits are reserved. 

According to 

the soft 


According to 

the soft 


63 On 

5 oFF 

LFt 63 Last trip - same as dEF1 to dEF9 279 - 

269 

User 

setting



LI* Logical inputs 

LI2 60 Logic input 2 - 

LI3 60 Logic input 3 - 

Lo 47 

OIt 57 

OId 56 

OSd 59 

OSt 58 

Logic Output relays 

status 

Overcurrent time 

delay 

Overcurrent 

threshold 

Over voltage 

threshold 

Under voltage time 

delay 




Modbus 

code and 

Adjustment 

Range (1) 

d0: Input 1. 0 – open, 1 – closed. 

d1: Input 2. 

d2: Input 3. 

d3...d15: Reserved 

0 = Strt 

1 = rUn 

2 = 2nd 

3 = EtF 

4 = rSt 

5 = FAn 

6 = FI 

7 = LIL 

2 = 2nd 

3 = EtF 

4 = rSt 

5 = FAn 

6 = FI 

7 = LIL 

Description 

start:for a 3-wire control 

run:for a 2-wire control 

2nd set of parameters 

external detected fault 

remote reset 

fan control 

trip inhibition 

forced local command 

2nd set of parameters 

external detected fault 

remote reset 

fan control 

trip inhibition 

forced local command 

d0: Relay 1. 0 – not energized, 1 - energized 

d1: Relay 2 

d2...d15: reserved 

s 0 to 50 s 

% 

ofIn 

% 

of Uln 

100 to 300, by 


PG* Proportional gain % 0 to 100% 

PHL 58 

Phase loss 

detection 

PHr 57 Phase sequence - 

PtC 59 

PTC probes motor 

monitoring 

5 with Modbus = 0.5s 


Modbus 

address 

261 

Factory 

setting 

72 rUn 

73 rSt 

262 

51 0.5 

- 50 200 

110 to 125 - 60 120 

s 1 to 10 - 61 2 

- 

- 

0 = oFF 

1 = On 

0 = 123 

1 = 321 

2 = oFF 

0 = oFF 

1 = On 

This parameter is reserved 

for expert mode. 

Active when SSC = On 

off 

on 

123 

321 

off 

off 

on 

37 60 

57 On 

56 oFF 

62 oFF 

User 

setting 

79





80 


r1 61 Relay 1 - 

Modbus 

code and 

Adjustment 

Range (1) 

0 = StPd 

1 = nStP 

2 = Strt 

3 = rUn 

4 = rdY 

5 = trIp 

6 = ALr 

Description 

stopped 

not stopped 

starting 

running 

ready 

trip 

alarm 

Modbus 

address 

Factory 

setting 

74 nStP 

r2 61 Relay 2 - as r1 as r1 75 trIP 

rnt 63 Total run time hours - - 273 - 

rPr 64 

SICL 63 

Reset of trip history 

and counters 

Last start maximum 

current 

- - - NA - 

A 0 to 999 - 276 - 

SLG 53 Starts period min 1 to 60 - 33 30 

Snb 53 Number of starts - 

SPCU 54 

Start-stop profile 

control voltage 

SSC 54 Start-stop control - 

- 

1 to 10 

11 = oFF 

0 

1 

2 

3 

0 = oFF 

1 = On 

Number of starts 

off 

0 

1 

2 

3 

off 

on 

32 oFF 

36 0 

35 On 

Stnb 63 Total number of starts - - - 274 - 

StPr 63 Last starting time s 0 to 999 - 275 - 

t90 51 Initial voltage % 

t92 55 2nd initial voltage % 

10 to 50% of full 

voltage, by 


10 to 50% of full 

voltage Uln, by 


- 16 30% 

- 40 30% 

User 

setting



tbr 62 Modbus baudrate Kbps 

tESt 64 Soft starter self test - 

tHP 52 

Motor thermal 

protection 




- 

0 = 4.8 

1 = 9.6 

2 = 19.2 

on 

off 

1 = 10 

2 = 20 

3 = 30 

Modbus 

code and 

Adjustment 

Range (1) 

Description 

Modbus 

address 

Factory 

setting 

- 81 19.2 

on 

off 

class 10 

class 20 

class 30 (heavy duty) 

NA - 

22 10 

tLS 51 Max start time s 1 to 250 - 18 15 

ttO 62 Modbus time out s 

Ubd 57 Unbalance threshold 

% of 

In 

1 = 0.1 to 

600 = 60.0 

101 = oFF 

10 to 100% 


600 with 

Modbus = 60.0s 

83 5.0 

- 52 25 

Ubt 57 Unbalance time delay s 1 to 60 - 53 10 

UdP 64 

UId 56 

Soft starter software 

version 

Under current 

threshold 

- 0000 to 9999 - 317 

% of 

In 

Uln 50 Line voltage V 

UIt 56 

USd 58 

USt 58 

Under current time 

delay 

Under voltage 

threshold 

Under voltage time 

delay 

0 = oFF 

20 to 90% of In 

Q range: 200 to 440 

S6-S6U ranges: 200 to 

600 

- 48 oFF 

- 2 

Q range: 400 

S6-S6U 

ranges: 480 

s 1 to 40 - 49 10 

% of 

In 

50 to 90% of Uln - 58 70 

s 1 to 10 - 59 5 

Voltage* Voltage V Line voltage, volts 260 

User 

setting 

81

Annex 1: UL508 schematics 

SH31.../4 or SH31.../6: 230 V, 2-wire control, freewheel stop 





82 

Z1 




Annex 1: UL508 schematics 

SH31.../6 US edition: 110V, 2-wire control, freewheel stop 

Z1 







r2 trlP Trip relay is denergized upon trip 

83

Annex 2: Short-circuit rating and branch circuit protection 

Recommended fuse ratings for UL and CSA requirements 

Components for use together in accordance with standard UL508 

Soft starter 208/600 V- 60 Hz (+10% -15%) - Standard rating. 

SH31 

Stand-alone 

product 

Suitable For Use On A Circuit Capable Of Delivering Not More Than ___X____ rms Symmetrical Amperes, 575 Volts Maximum, When 

Protected by __Z 1____ with a Maximum rating of__Z 2___. 

(1) Ferraz Shawmut manufacturer. 

Enclosed products 

Suitable For Use On A Circuit Capable Of Delivering Not More Than ___X____ rms Symmetrical Amperes, 575 Volts Maximum, When 

Protected by __Z 1____ with a Maximum rating of__Z 2___. 

84 

SH31-7.5/6 

Max. short circuit 

current rating 

(SCCR) X 

Branch circuit 

protection Z1 

(1) 

kA A 

AJT40 40 

SH31-15.0/6 5 

AJT70 70 

Rating 

Z2 

SH31-22.0/6 AJT100 100 

SH31-30.0/6 

AJT125 125 

SH31-37.0/6 AJT175 175 

SH31-45.0/6 AJT200 200 

10 

SH31-55.0/6 AJT250 250 

SH31-75.0/6 AJT300 300 

SH31-90.0/6 AJT400 400 

SH31-110/6 

AJT500 500 

SH31-132/6 AJT600 600 

SH31-160/6 18 

2 x AJT350 2 x 350 

SH31-200/6 2 x AJT400 2 x 400 

SH31-250/6 2 x AJT500 2 x 500 

SH31-315/6 30 2 x AJT600 2 x 600 

SH31 

US edition 

SH31-7.5/6 

Max. short circuit 

current rating 

(SCCR) X 

Branch circuit 

protection Z1 

Rating 

Z2 

kA A cm 3 

Minimum enclosure 

volume 

inch 3 

30 40 2406 

SH31-15.0/6 60 40 2406 

SH31-22.0/6 90 40 2406 

SH31-30.0/6 110 52 3149 

SH31-37.0/6 150 52 3149 

SH31-45.0/6 175 52 3149 

Class J 

SH31-55.0/6 200 125 7630 

time delay 

SH31-75.0/6 100 

250 125 7630 

SH31-90.0/6 300 125 7630 

SH31-110/6 400 130 7892 

SH31-132/6 450 130 7892 

SH31-160/6 600 130 7892 

SH31-200/6 600 130 7892 

SH31-250/6 Class L 800 195 11869 

SH31-315/6 time delay 800 195 11869

BLEMO ® Frequenzumrichter 

Siemensstraße 4 

D-63110 Rodgau – Dudenhofen 

Germany 

Tel.: ++49 / 6106 / 82 95-0 

Fax: ++49 / 6106 / 82 95-20 

Web: www.blemo.com 

Mail: info@blemo.com

DANGER - Blemo

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