Electromechanical Components - Siemens SINAMICS G12 Hardware Installation Manual

4.2.3

Electromechanical components

Surge voltage protection circuit
● Connect surge voltage protection circuits to the following components:
– Coils of contactors
– Relays
– Solenoid valves
– Motor holding brakes
● Connect the surge voltage protection circuit directly at the coil.
● Use RC elements or varistors for AC-operated coils and freewheeling diodes or varistors
for DC-operated coils.
Power Module PM240-2
Hardware Installation Manual, 08/2017, A5E33294624B AG
4.2 EMC-compliant installation of a machine or system
Installing/mounting
31