Alarm system sensor topology apparatus and method
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United States of America Patent
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May 19, 2009
Grant Date -
Oct 18, 2007
app pub date -
Apr 13, 2006
filing date -
Apr 13, 2006
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Abstract
An alarm system sensor topology to reduce susceptibility to configuration errors and component failures includes a sensor configured to differentiate between system status conditions, including electrical power isolation for power polarity independence and for sustained sensor operation during power interruptions. A topological method for reducing fire sensor susceptibility to configuration errors and component failures includes configuring a sensor with capability to operate using electrical input power independent of power polarity, and providing capability to operate at least a part of the sensor circuitry for at least a specified time interval in the absence of applied electrical power.
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