Annunciator -

A field contact opens or closes, sending a signal to the annunciator.

An annunciator is a centralized monitoring system—visual, audible, or both—designed to provide immediate alerts about abnormal conditions, faults, or status changes in industrial processes, electrical systems, or fire safety networks. annunciator

It gives operators an at-a-glance status of equipment, allowing quick identification of issues before they escalate. A field contact opens or closes, sending a