Manual

78 Rockwell Automation Publication DRIVES-IN001M-EN-P - March 2014

Chapter 6 Electromagnetic Interference

Putting resistor-capacitor (RC) networks or voltage-dependant resistors

(varistors) across contacts can mitigate transient interference. Be sure to select

components rated to withstand the voltage, power, and frequency of switching

for your application.

A common method for mitigating transient interference is to put a diode in

parallel with an inductive DC load, or a suppressor in parallel with an inductive

AC load. Be sure to select components rated to withstand the voltage, power, and

frequency of switching for your application.

Load Load

IMPORTANT

These methods are not totally effective at stopping transient interference,

because they do not entirely eliminate arcing at the contacts.

Load