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Author Topic: Sounder circuit interface  (Read 16487 times)

Offline FireFly40

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Sounder circuit interface
« Reply #15 on: June 18, 2007, 11:28:54 PM »
Its also worth considering the fact that any piece of remote stuff triggered by the fire alarm should not draw additional current from fire alarm sounders (ie low voltage PSU) with an additional relay, made to latch on when triggered by sounder relay, problem solved. A NC push button or keyswitch reset only authorised staff can reset.
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Offline Wiz

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Sounder circuit interface
« Reply #16 on: June 19, 2007, 11:39:45 AM »
Quote from: FireFly40
Its also worth considering the fact that any piece of remote stuff triggered by the fire alarm should not draw additional current from fire alarm sounders (ie low voltage PSU) with an additional relay, made to latch on when triggered by sounder relay, problem solved. A NC push button or keyswitch reset only authorised staff can reset.
This recommendation does not apply to anything that draws current only during an alarm condition. The recommendation is in place to prevent additional loads being applied to the battery during standby (mains failure) conditions.
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