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Is it a PIR? And the click says a relay is involved.
Relays are happy at 1HZ but a PIR may have a tunable delay to avoid multiple triggers.
Backstop-
It definitely looks like there’s a relay in there. And it figured avoiding multiple triggers would make sense. Will leave it to settle and hope for the best.
Have to go back to fanny on to wire in some security cameras now anyway. Joy of joys. More cheap Amazon/Aldi/Costco/Homebase shite electronics to faff on with.
Nef
Don’t quite know. Think it’s a bit more complicated as it’s live in/live out/neutral terminals. And there’s an audible click of the switch as it goes on/off.
Think I’ve got it sorted. My guess is that it doesn’t like being switched on and off too much/too rapidly. So trying to test with a rag covering it up is just making it unhappy.
Disconnected to double check my terminations and it seemed ok after that (I assume it just wanted to be left off for a bit). Will leave overnight and see what it does. Just don’t want to be coming back to the job another time if I can sort it now.