Siemens SIRIUS 3RW55 - EMERGENCY STOP Shutdown to SIL 1 or PL C with a 3 SK1 Safety Relay Without the 3 RW55 Failsafe Soft Starter

Wiring
AQ I+ AQ U+ AQ-
>
1/L1
2/T1
3/L2 5/L3
A24/T2 6/T3
A1
T1 T2
L+ M DI 1 DI 2 DI 3 DI 4
U1 V1 W1
PE
1
2
13
NO
14
1
2
3
4
5
6
A1
A2
1
2
U
1/L1
2/T1
3/L2
4/T2
5/L3
6/T3
1
2
3
4
5
6
1/L1
2/T1
3/L2
4/T2
5/L3
6/T3
13
14
13
14
x1
x2
23
NO
24
A1
A2
11
12
-Q11
-M1
3~
M
-F1
-Q11
-F1
-Q21
-Q22
-Q1
-Q21
-S1
-S2
-P1
-Q11
-Q22
-Q1
PE PE
L1 L2 L3
L/+
L/-L/-
L/+
F1 Fuse
S1 Pushbutton: Switch: Motor On / O󹪜
S2 Pushbutton: Reset
Q1 External overload relay
Q11 3RW5 soft starter
Q21 External bypass contactor
Q22 Main contactor
P1 Indicator light
M1 Motor
PE Protective conductor
A.3.13 EMERGENCY STOP shutdown to SIL 1 or PL c with a 3SK1 safety relay without
the 3RW55 Failsafe soft starter
The 3RW55 soft starter has no e󹪜ect or in󹪞uence on the safety function of the application. For
this reason, it is neither positively nor negatively considered in the safety application, and also
does not have to be included in the calculation for proof according to the standards.
Example circuits
A.3 Special applications
SIRIUS 3RW55 and 3RW55 Failsafe Soft Starters
Equipment Manual, 02/2022, A5E35630887002A/RS-AF/006 335