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NOTE: This is an unformatted excerpt from our online fire protection training library.

Supervisory Initiating Devices

supervisory signal

Fire alarm systems receive three types of signals:

ALARM SIGNALS are those signals that indicate the presence of a fire, such as actuation of a manual fire alarm box, smoke detector, heat detector, or sprinkler waterflow switch.

SUPERVISORY SIGNALS are those signals that indicate an "off normal" condition in some other monitored fire protection or life safety system, or the need for action in connection with guard tours, fire suppression systems or equipment, or maintenance features of related systems.

TROUBLE SIGNALS indicate a problem with the fire alarm system itself that could prevent the fire alarm system from operating properly during a fire. This includes open circuits, ground faults, and dead batteries.
NOTE: This is an unformatted excerpt from our online fire protection training library.

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