Hi

Can anyone tell me what voltage goes through the trigger circuit? I have a smoke detector that is N/O and my alarm has N/C zones. I was hoping to wire the N/O of the detector to the solenoid on a N/C relay and connect the zone trigger to that - any thoughts?

& the panel?

It is 12 volts.

Depending on the panel, you may not need a relay. Lot's of alarm panels can accomodate a N/O circuit wired from the circuit to tamper (With a link across the circuit terminals)... this is a throw back to the days of pressure pads.

On many higher spec. panels you can select N/C or N/O

Just to add to that, I wouldn't drive a relay from zone wiring as it may or may not cause some trouble at some point. Much better, and safer, to drive the relay from the aux via the smokes NO terminals and have the relays NC across the zone. (That is of course if the advice above re: wiring as per pressure pads isn't suitable for your panel).

I dont suppose you could do a quick diagram could ya.

Food for thought!

It's a Lyntek Nexus 8, which I bought so I could replace the British Gas Monitored Alarm that the previous owner had without having to rewire the zones - it was the only one I could find at a decent price with a central control and seperate user panel.

Basically what I was thinking was 12V feed to the smoke detector as normal, wire the relay energiser across the NO on the detector and the NC circuit from the alarm across the NC on the relay. Theory being that if the detector triggers it will close the circuit, energise the relay, amd open the alarm circuit thus triggering the alarm. Has the advantage that voltage loss won't trigger the zone.

Am I just talking rubbish?!!

why sod about change the smoke to an apollo.

I'm having real trouble finding one that retails to the public at a sensible price!

I'm having real trouble finding one that retails to the public at a sensible price!

Whats a sensible price?

It's a Lyntek Nexus 8, which I bought so I could replace the British Gas Monitored Alarm that the previous owner had without having to rewire the zones

Are sure its a wired system? have you opened up the control box yet? It would be simpler to get the BG panel reprogrammed for your own use.