
Relay output terminals
When relay output terminals are connected with inductive loads (relays, contac-
tors, solenoid valves, motors, etc.), following noise suppression circuits need to
be applied at the coils of the inductive loads, as close as possible to the induc-
tive loads, in order to reduce the electromagnetic interference generated from
inductive load action.
Tb Shared terminal
Tc
Normally closed contact
Ta
Normally open contact
RC RC filtering
VDR Varistor
D
Diode
Fig. 8-10: Noise suppression circuits for relay output terminals
Bosch Rexroth AG
Frequency Converter Wiring
VFC 3210
42/253
DOK-RCON04-VFC3210****-IT01-EN-P