Power supply control device in fire alarm system

Details Power supply control device in fire alarm system Power supply control device in fire alarm system

1990-01-23

1992-09-29

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular system function

340505, 340514, 340588, G08B 2600

Patent

active

051516837

ABSTRACT:
A power supply control device is provided in a fire alarm system having terminals such as fire detectors and/or repeaters with comparators to detect abnormalities such as fire or an operating status of controlled apparatus, and is equipped with a reference voltage supply a source to supply reference voltage to the comparators, and a power supply control to allow the reference voltage to be supplied to the comparators only during the detecting time.

REFERENCES:
patent: 4785284 (1988-11-01), Kimura
patent: 4816808 (1989-03-01), Morita
patent: 4847593 (1989-07-01), Igarashi
patent: 4962373 (1990-10-01), Sirois

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