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SINAMICS G120D requires a PP-switching fail-safe output.
1)
You may operate the inverter and the ET 200S with different 24‑V supplies - as well as with the
same 24‑V supply.
Figure 4-28 Connecting PP-switching ET 200S modules using a SINAMICS G120D as example
Installing
4.4 Controlling via a fail-safe digital input
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
Function Manual, 01/2017, FW V4.7 SP6, A5E34261271B AD
81