Patent ID: 6124795
Filing Date: 2000-09-26
Classification: G08B

Abstract:
An alarm apparatus for use with a controllable air handling system comprising:a plurality of ambient condition detectors wherein each detector includes at least an alarm output port, an interconnect input/output port, an air handling system output port and control circuitry coupled to the handling system output port;a hardwired interconnect link coupled to a respective input/output port of at least some of the members of the plurality wherein in response to at least one of the interconnected detectors entering an alarm state, the remaining interconnected detectors each produce a respective air handling system control signal; andwherein at least some of the detectors including circuitry having an alarm condition indicating output state wherein that state, when present at a detector, is coupled to the interconnect input/output ports of the members of the plurality but is coupled to the alarm output port of only the respective detector.