Stratos®Pro A4... PH User Manual

Protective Wiring of Relay Contacts
Relay contacts are subject to electrical erosion. Especially with
inductive and capacitive loads, the service life of the contacts will be
reduced. For suppression of sparks and arcing, components such as RC
combinations, nonlinear resistors, series resistors and diodes should
be used.
1 2
3
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1
3
2
Typical AC applications
with inductive load
1) Load
2) RC combination,
e.g. RIFA PMR 209
Typical RC combinations for
230 V AC:
capacitor 0.1 µF / 630 V,
resistor 100 Ω / 1 W
3) Contact