Siemens SINAMICS G120 Function Manual page 86

Interfaces
3.2 Activation via F-DI
Activating several inverters simultaneously
You may activate the safety functions of several inverters simultaneously with one or several
series-connected safety sensors.
Inverter delivers supply voltage
Connect the 24 V supply of the inverter to the sensors and connect the reference potentials
of the inputs used to GND.
Figure 3-8
External power supply
Connect the external power supply to the sensors and connect the reference potentials of
the inputs used to the reference potential of the external power supply.
Figure 3-9
84
Simultaneous activation of several inverters with inverter power supply
Simultaneous activation of several inverters with external power supply
Safety Integrated Function Manual, SINAMICS G120 and G120C
Function Manual, 01/2011, FW 4.4, A5E03052391B AB