Installing Wiring For I/O Devices; Wiring To Inductive Loads - GE VersaMax Manual

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Installing Wiring for I/O Devices

Wiring to Inductive Loads

When wiring outputs to inductive loads, use of external suppression circuits is
recommended. If possible, the external suppression circuits should be connected across the
actual load. If that is not possible, external suppression circuits should be connected to
each point that will drive an inductive load as shown below.
AC Inductive Loads
For AC inductive loads, the snubber network
should consist of a 250VAC, 0.1µF capacitor
connected in series with a 100 Ohm ½ Watt
or higher resistor. A capacitor with a different
working voltage may be chosen, as
appropriate for the application.
Recommended snubber packages include
104M06QC100 or 104M06RL100 from
Paktron.
Isolated Outputs, AC
Isolated Output
Return for Isolated
Output Point
Grouped Outputs, AC
Output Point
A18 and/or
B18
2-16 VersaMax® Modules, Power Supplies, and Carriers User's Manual – March 2003
Point
100 Ohm
½ Watt
Inductive
Load
0.1µF
250VAC
100 Ohm
½ Watt
Inductive
Load
0.1µF
250VAC
DC Inductive Loads
For DC inductive loads, a diode should be
placed across the load as shown below.
Recommended diodes include:
1N4934 100 volt, 1A;
1N4936 400 volt, 1A;
1N4937 600 volt, 1A.
These diodes are available from most
manufacturers.
Isolated Outputs, DC
Isolated Output
Point
Diode
Return for Isolated
Output Point
Grouped Outputs, DC
Output Point
Diode
A18 and/or
B18
Inductive
Load
Inductive
Load
GFK-1504K