3Sk1 Safety Relay With 3Rm13 Motor Starter Via Device Connector - Siemens 340 Manual

A.2.2

3SK1 safety relay with 3RM13 motor starter via device connector

The 3RM13 Failsafe motor starter is connected to a 3SK1 safety relay via a 3ZY1 device
connector.
The two directions of rotation are switched on and off operationally via IN1 and IN2, e.g. with
a PLC.
The control supply voltage (L+ and L-) 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 in accordance with EN ISO 13849-1
A safety-related application up to SILCL 3 to EN 62061:2005, 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.
Bypassing the safety function when using device connectors
When operating with a 3SK1 safety relay and a device connector, the supply voltage for
3RM1 motor starters is established via the device connectors.
In this case, do not connect anything to terminals A1 and A2 of the 3RM1 motor starters, in
order to prevent bypassing of the safety function.
SIRIUS 3RM1 motor starter
Manual, 11/2013, A5E0345285095020A/RS-AB/002
WARNING
Typical circuits
A.2 Typical circuits for 3RM1 Failsafe
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