Versatile fire alarm, evacuation and emergency lighting system

摘要

A fire alarm, evacuation and emergency lighting system comprising of battery eliminators/field device controllers fitted or connected to smoke alarms, single point evacuation sounders, single point evacuation/emergency lights, single point visual alarm devices, audio-visual alarm devices, all the above devices being connected to a control and indicating equipment through two common conductors to provide common alarm communication so that if one smoke alarm on a circuit detects smoke, and latches into alarm mode, sounders and lights of all other devices connected to the circuit wiring, including sounders of other smoke alarms, are activated. The system incorporates the following features: (A) common alarm communication between all circuit devices, (B) smoke alarm latched alarm indication, (C) smoke alarm remote latched alarm indication, (D) smoke alarm remote testing and remote silencing facilities, (E) indications for alarm and open circuit fault conditions of the circuit at the control and indicating equipment, (F) further indications at the control and indicating equipment of a 3 conductor wiring system to indicate which smoke alarm on the circuit has latched into alarm mode.