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PIR wiring help

AllyS
in !!..DIY Installers..!!

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I'm trying to work out the wiring of an ancient PIR sensor that's been disabled. I don't know if it's been disabled because it's faulty or for another reason.

I've got a replacement PIR sensor but I thought it would be good to work out the wiring and test the existing sensor before attempting to replace it.

It's currently wired like this: 

PXL_20250101_150339773.jpg

Blue & Red: tamper detection (T2 & T1). This is working.

Yellow & Black: Wired together in (C)
White: Negative (V-)

I guessed that Green might be V+ and the PIR circuit wired together, so I tried wiring Green to V+ and Yellow to the unused NC. This resulted in the PIR LED always being on and triggering the alarm.

I also tried Black to V+ and Green to NC, which resulted in no PIR led but always triggering the alarm.

Can anyone help?

 

Just give it power only and meter the alarm relay. However if the led is staying on I'd say its goosed

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44 minutes ago, AllyS said:

I'm trying to work out the wiring of an ancient PIR sensor that's been disabled. I don't know if it's been disabled because it's faulty or for another reason.

I've got a replacement PIR sensor but I thought it would be good to work out the wiring and test the existing sensor before attempting to replace it.

It's currently wired like this: https://photos.app.goo.gl/9RxGBqLzuH3KEwn98

Blue & Red: tamper detection (T2 & T1). This is working.

Yellow & Black: Wired together in (C)
White: Negative (V-)

I guessed that Green might be V+ and the PIR circuit wired together, so I tried wiring Green to V+ and Yellow to the unused NC. This resulted in the PIR LED always being on and triggering the alarm.

I also tried Black to V+ and Green to NC, which resulted in no PIR led but always triggering the alarm.

Can anyone help?

 

Green is probably V+ the yellow and black will be the circuit. If the detector powers up when you put the green in V+ leave it for a few mins its normal for a detector to work out its surroundings when first powered, if the led stays on you know why it was dissed. you can swap it with most any detector so long as it has six wire ie a separate tamper and alarm circuit

There's gunk on the pyro I'd say it needs replacing anyway.

As above for what the colours are, weird as those may be...

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