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Power supply control device in fire alarm system

  • US 5,151,683 A
  • Filed: 01/23/1990
  • Issued: 09/29/1992
  • Est. Priority Date: 01/31/1989
  • Status: Expired due to Fees
First Claim
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1. In a fire alarm system terminal, an apparatus comprising:

  • a comparator for receiving a detection signal from a fire detection apparatus and for discriminating a fire phenomenon by comparing the detection signal with a reference voltage during a detection period in which the fire alarm system terminal is activated to detect the fire phenomenon;

    a reference voltage supply means for selectively generating and outputting the reference voltage to said comparator; and

    ,a power supply control means for causing said reference voltage supply means to generate and output the reference voltage to said comparator only during said detection period.

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