Initiating Devices

Smoke detectors Heat detectors Manual pull stations Sprinkler waterflow switches

Detection Circuits

Connect initiating devices to a fire alarm control panel (FACP)

Notification Devices

Horns Strobes Speakers

Notification Circuits

Connect notification devices to the FACP to activate them in case of an alarm

Control Devices

Fire alarm control panels Remote annunciators Supervisory panels

Control Circuits

Provide power to the FACP and other control devices Monitor system status and communicate with initiating and notification devices

Power-Limited Circuits

Class A: Power smoke detectors Class B: Power heat detectors and manual pull stations

Supervisory Devices

Supervisory smoke detectors Voltage monitoring relays

Supervisory Circuits: Monitor the integrity of initiating devices and wiring Generate an alarm if any device or wiring fails Flag for review