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Installation
1606218 02 08/2006 25
Control of
Inductive Loads
The outputs of the devices described in this manual are equipped with an integrated
protective system against the high noise voltages that may be generated by
inductive loads.
Integrated protective system against the high noise voltages generated by inductive
loads
The varistor rapidly discharges the energy accumulated in the magnetic field of the
inductive load.
The high voltages arising from the disconnection of inductive loads create large
fields in the wires that may cause disturbances in nearby circuits or devices. It is
advisable to provide an anti-interference device at the load level. In this way, the
voltage peak generated by the inductive load is short-circuited directly at the point
at which it occurs.
Varistor
Inductive load
e.g. electromagnetic
valve