Operating Instructions

4.1.3 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.
Installing
4.1 EMC-compliant setup of the machine or plant
Converter with the CU230P-2 Control Units
64 Operating Instructions, 04/2018, FW V4.7 SP10, A5E34257946B AF