Re: Can anyone assist?


"R.P.McMurphy" <r.p.mcmurphySPAM@xxxxxxxxxxxx> wrote in message
news:455f523e$0$8742$ed2619ec@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Well, there should be a wire that links the two detectors together. I
assume that is hot when the alarm sounds. If so, connect a 240 VAC relay
from that to neutral and use that to cut the door power.

how can i then delay the reconnection of power?

It depends on how much isolation is needed. That depends on the detectors.

Add a changeover contact to the relay which transfers the coil from the
detectors to 240 VAC. Add a pushbutton in series which opens that
connection.

When the fire alarm sounds, the door power will be cut and the relay will
transfer to mains AC and will lock on, thus open. When the fire alarm goes
off it will stay on. When the push button is pressed the relay will transfer
back to the alarms which will be off thus the relay will stay off.

You need one NC push button and one 240 VAC relay with DPDT contacts. Any
electrician can wire this.





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