Siemens 340 Manual page 46

Description
3.6 Accessories and order number scheme
Using device connectors with 3SK1 safety relays
Interconnection of several 3RM11/3RM13 Failsafe motor starters into a group can be used
for joint safety-related shutdown by a 3SK1 safety relay. Safety-related applications up to
SILCL 3 to EN 62061, PL e/Cat. 4 to EN ISO 13849-1 can be realized.
Failure of the safety function during hybrid operation of Failsafe and Standard motor
starters
Hybrid operation of 3RM10/3RM12 Standard motor starters with 3RM11/3RM13 Failsafe
motor starters in safety-related applications is not admissible.
Only ever use safety-related motor starters (3RM11 Failsafe and 3RM13 Failsafe) in safety-
related applications.
3RM1 motor starters are shut down by interrupting the control supply voltage by means of
the 3SK1 safety relay. For this reason, the control supply voltage must not also be applied to
the 3RM1 motor starters.
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.
Up to five Failsafe motor starters can be operated on one 3SK1 safety relay with device
connectors. With regard to configuration in combination with the 3SK1 safety relays, also pay
attention to the configuration rules in the manual entitled "3SK1 safety relays"; see Chapter
"Further documentation (Page 11)".
The last motor starter in a row must be placed on a device termination connector. This
closes the circuits that were built up with the connectors.
Reference
For additional information on using device connectors, refer to "FAQs on the 3RM1 motor
starter (http://support.automation.siemens.com/WW/view/de/81525494)".
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WARNING
WARNING
SIRIUS 3RM1 motor starter
Manual, 11/2013, A5E0345285095020A/RS-AB/002