Which signal indicates a change in the normal operational status of integrated fire protection systems?

The supervisory signal is designed to indicate a change in the normal operational status of integrated fire protection systems. This type of signal is crucial because it alerts system operators or monitoring personnel to conditions that may not necessarily represent an emergency but could affect the system's functionality or readiness. Examples of situations that would trigger a supervisory signal include issues like a malfunctioning component, a pipe failure, or a closed valve in a sprinkler system, all of which might not activate an alarm but still require attention to ensure the system remains operational and effective.

In comparison, an alarm signal typically indicates an actual fire or emergency condition that requires immediate action to ensure safety. Emergency signals would alert occupants or responders to imminent danger, while warning signals often convey general notifications or preventative advisories that do not necessarily pertain strictly to changes in system status. These distinctions underscore the unique role that supervisory signals play in maintaining the overall integrity and effectiveness of fire protection systems.