Siemens SINAMICS G120 Function Manual page 123

Test mode 3
When testing the safety output, the inverter switches off the two outputs one after the other
and evaluates the feedback via a digital input.
Figure 5-14
Test mode 4
When testing the safety output, the inverter switches off the two outputs one after the other.
The transistor outputs of the SINAMICS G120D monitor the inverter using internal signals.
The safety input F-DI must monitor the safety output of the inverter.
Figure 5-15
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
Function Manual, 04/2014, FW V4.7, A5E34261271B AA
Expected response at the digital input for test mode 3
Test mode 4
Commissioning
5.7 Setting extended functions
123