Omron NJ501-1400 User Manual page 385

Circuit
Yes
Varistor method
Power
supply
When switching a load with a high inrush current such as an incandescent lamp, suppress the inrush
current as shown below.
Countermeasure 1
OUT
R
COM
Providing a dark current of
approx. one-third of the rated
value through an incandescent
lamp
NJ-series CPU Unit Hardware User's Manual (W500)
Current
AC DC
Yes The varistor method prevents the
imposition of high voltage between
the contacts by using the constant
voltage characteristic of the varis-
tor. There is a delay in the resetting
time.
If the supply voltage is 24 or 48 V,
insert the varistor in parallel with
the load. If the supply voltage is
100 to 200 V, insert the varistor
between the contacts.
Countermeasure 2
R
OUT
COM
Providing a limiting resistor
Characteristic
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Appendices
Required element
A-101
A