Siemens SINAMICS G120 Function Manual page 63

Components in the same control cabinet
A control cabinet that has been designed and wired correctly does not contain any damaged
wiring or cross circuits.
Under the assumption that the preprocessing devices switch the output used twice (involves
two contacts in series), within a control cabinet you can interconnect the safety relay and
inverter through a single channel cable connection. The two terminals of the safety input
must be connected to each other at the inverter.
Figure 4-14
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
Function Manual, 04/2014, FW V4.7, A5E34261271B AA
Interconnecting the inverter and safety relay within the same control cabinet
Installing
4.3 Activation via F-DI
63