First I would like to thank those contributors to my previoooous thread, thanks!

From your contributions I feel that a 'Quad' is probably the way to go.

The present PIR has three wires from it, +ve, +ve and -ve trigger wire. From what I can tell from specs, the trigger wire would go from a realy that is fail safe closed. I want something that sends a signal when triggered.

Can anybody help me please.

if anybody could ssend me a copy an installation leaflet for a 'run of the mill' PIR I would appreciate it so that I can get a clearer idea of the connections and operation.

Many thanks,

John

I was going to suggest using a mini relay but then thought it would be a lot easier to use a pir with NC and NO terminals, anyone recommend one?