ADE optima G3 fire alarm switch.

[Guest Chewie]

Hi.

I have several housesafe 3 in 1 fire alarms in my property, these are the ones that replace a light pendant. They are all interconnected so if one triggers they all go off. I want to use the interconnect to operate the fire switch on my alarm panel, so that a speech dialler will inform me if there is a fire alarm trigger.

You cannot draw any current from the housesafe alarms because the voltage will drop down too far, so you cant just use a relay. So I have an op-amp and relay to close a contact when there is a trigger from the fire alarm.

This works well and when the fire alarm is set off using the test button, the relay closes to make the circuit. I have programmed zone 8 in the g3 panel as a 24 hour fire zone to test the housesafe fire alarm with the panel and it does work but not quite as I would expect.

When I press the test button on the fire alarm, the relay closes and makes the switch in the g3 alarm panel, but the g3 alarm panel does not go off until I release the test button on the fire alarm.

So for the g3 alarm panel to register a fire alarm trigger and hence the speech dialler to call out, the switch on the g3 alarm panel has to close and then open again. Is this normal as I would have thought it would go off as soon as the switch closed.

Many thanks for your time.

Chewie

[Guest Chewie]

You need to make the circuit closed going open in alarm.

Pete

38471[/snapback]

So the circuit needs to be normally closed. OK thanks a lot, makes sense.