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FX2NC Series Programmable Controllers Outputs 6.
6-10
3) Interlock
4) In-phase
For loads such as forward/reverse contactors, etc.,
where a hazardous condition could result if switched
ON simultaneously, an external interlock should be
provided for interlocking the PLC's internal
programs as shown to the right.
PLC output contacts (*) should be used in an "in-
phase" manner.
Inter-
lock
PLC output
contact
PLC output
contact
Limit of normal
rotation
Limit of reverse
rotation
*
Bad
Good
*
*
*