4.4.2.4 SIRIUS 3SK1 safety relay
The wiring examples listed below are implemented using safety relays with relay enable
circuits. Safety relays with semiconductor enabling circuits can also be used.
The diagrams only show the interconnection between the safety relay and a SINAMICS G120
inverter as example.
Additional information on wiring a safety relay is provided in the product documentation in the
Internet:
SIRIUS 3SK1 safety relays (
https://support.industry.siemens.com/cs/ww/en/ps/16381/man).
Components in the same control cabinet
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Figure 4-14 Wiring inverter and safety relay in an electrical cabinet using SINAMICS G120 with
CU240E-2 as example
A control cabinet that has been designed and wired correctly does not contain any damaged
wiring or cross circuits.
Assuming that the upstream, preprocessing device switches the output being used twice, in a
control cabinet you can wire the safety relay and the inverter through a single-channel cable
connection. At the inverter, you must connect both terminals of the fail-safe digital input with
one another.
Installing
4.4 Controlling via a fail-safe digital input
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
70 Function Manual, 01/2017, FW V4.7 SP6, A5E34261271B AD
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