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Typical circuits
A.2 Typical circuits for 3RM1 Failsafe
SIRIUS 3RM1 motor starter
Manual, 11/2013, A5E0345285095020A/RS-AB/002
155
A.2.3
3SK1 safety relay wired with 3RM13 motor starter
The 3RM13 Failsafe motor starter (230 V supply voltage) is connected to a 3SK1 safety
relay.
The two directions of rotation are switched on and off operationally via IN1 and IN2, e.g. with
separate switches.
WARNING
Bypassing the safety function in the event of a fault in the case of 3RM11/3RM13 Failsafe
motor starters with 110 to 230 V AC/110 V DC control supply voltage
The control signal for the control inputs in the case of 3RM11/3RM13 Failsafe motor
starters with 110 to 230 V AC control supply voltage must come from A1. Otherwise, the
safety function is bypassed in the event of a fault. Thus, only relay outputs are admissible
when using a PLC.
Do not use a separate control voltage. Only use the relay outputs when using a PLC.
The control supply voltage (L1 and N) to the motor starters is deactivated by the 3SK1 safety
relay and the system is in a safe state.
Note
SILCL 3 in accordance with EN 62061, PL e/Cat. 4 in accordance with EN ISO 13849-1
A safety-related application up to SILCL 3 to EN 62061, PL e/Cat. 4 to EN ISO 13849-1 can
be realized in this way.
To achieve SILCL 3/PL e/Cat. 4 for the safety-related application, all components of the
safety functions (detecting/evaluating/reacting) must be designed accordingly.
Note
A fuse must be fitted as short-circuit protection (4 A gL/gG) in the supply line to the supply
voltage of 3RM1 (L1).
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