Siemens SINAMICS G120 Operating Instructions Manual page 100

Adapt terminal strip
6.2 Fail-safe input
These special types of cable routing are normally required only if the cables are laid over
larger distances, e.g. between remote control cabinets.
Examples of connecting a fail-safe input can be found in Section: Connecting fail-safe digital
inputs (Page 456).
100
Converter with the CU250S-2 Control Unit (vector)
Operating Instructions, 06/2013, FW V4.6, A5E31759476B AB