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From: Arild Jensen (no email)
Date: Wed Apr 23 2008 - 00:17:18 EDT
> -----Original Message-----
> From: Frank Burrows
> I would like to keep the existing bells but provide some way to mute them
> but have them automatically reset after the alarm event.
>
> Does anyone have a circuit diagram for a resettable mute button?
REPLY
Use a Form C double pole relay. The one circuit is for the Bell. Wire the
normally closed circuit in series with the bell.
the other pole ( circuit) is used to latch the relay in th eenergizzed
position.
A momentary push button momentarily enrgizes the coil. When the NO contact
closes it feed power back to th ecoil thus latchign it open. Meanwhiel the
NC contacts breaks the bel circuit when relay is enrgized.
Remove power and relay drops out. That restores bell circuit and drop out
the coil holding circuit.
Arild
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