One common use for the normally open set of contacts on an overload relay is to provide an input signal to a programmable logic controller (PLC).

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Quizplus · Accepted Answer

The normally open contacts on an overload relay can indeed be used to provide an input signal to a PLC, indicating an overload condition and allowing the PLC to take appropriate action, such as shutting down the system or alerting an operator.

One Common Use for the Normally Open Set of Contacts