Siemens SIRIUS 3SK1 Manual page 110

System configuration
6.3 System configuration rules
● If output expansions are used, a device termination connector for the 3SK1 safety relay
must ALWAYS be used under the final device on the right (for 3SK1211) with the switch
setting: "1" (switch in top position), device termination connector set for 3SK1 safety
relay, > 45 mm wide (for 3SK1213) or device termination connectors for 3RM1 motor
starters must be used
● 22.5 mm device termination connector for 3SK1 safety relays:
– Below basic unit: the switch of the device termination connector must be open, i.e. in
– Below 3SK1211 output expansion: the switch of the device termination connector
● No switch needs to be set on the device termination connector for 3RM1 motor starters
● As from certain load limits/temperature ranges, clearances must be observed for 3RM1
Failsafe motor starters. To this end, there are appropriate device connectors for looping
through signals (3ZY1212-2AB00).
● In the configuration with a 3SK1 Advanced basic unit on a 3ZY12 device connector,
3RM1 Failsafe motor starters can only be controlled by the instantaneous enable signal
of the 3SK1 unit. If control of the 3RM1 Failsafe motor starter by means of the time-
delayed output is desired, this can only be done by wiring the time-delayed safety-related
output of the 3SK1 basic unit.
You will find further information on the configuration guidelines for 3RM1 Failsafe motor
starters in the SIRIUS 3RM1 motor starters
(http://support.automation.siemens.com/WW/view/en/66295730) manual, in the section
entitled "Load feeders - protection against short circuit".
110
position 2 at the bottom.
must be closed, i.e. in position 1 at top
SIRIUS 3SK1 safety relays
Manual, 06/2018, A5E02526190021A/RS-AD/004