Siemens SINAMICS PM240-2 - Electromechanical Components

Installing/mounting
4.2 EMC-compliant installation of a machine or system
Power Module PM240-2
28 Hardware Installation Manual, 01/2017, A5E33294624B AE
4.2.3
Electromechanical components
Radio interference suppression
● Connect interference suppression elements to the following components:
– Coils of contactors
– Relays
– Solenoid valves
– Motor holding brakes
● Connect the interference suppression element directly at the coil.
● Use RC elements or varistors for AC-operated coils and freewheeling diodes or varistors
for DC-operated coils.