Burgalar Alarm PIR Sensors 'churp'

Financial_Savvy

do you know what make of alarm sensor you had?

shelly

You mean the PIR's themselves? No sorry I have no idea.

curlyfairy

Financial_Savvy wrote: »

Hi all

I have bought 1 PIR sensor of Ebay to install as a test.

Is the cabling sequence

1. Red
2. Black
3. Blue
4. Yellow
5. Green
6. White

Do I just turn off the power at the consumer unit and then take the lid off and put the alarm code to shut it up, and then fit the new sensor, taking out one cable at a time?

Thanks

The red is the 12volt positive,the black is the 12volt negative.Blue and yellow will be the 'circuit' and green and white will be the tamper.Not all sensors have the same order of connections.If you turn off the power the sensor will probably still be live due to the battery in the control panel.Take the red out and cut the bare end off,then take the black out and do the same,the others carry no power so just unscrew the connections and pull them out,install the new pir and wire up as above,just do the red and black seperately so they do not touch.

HTH.

Ben

Mutton_Geoff

Some installers move away from the standard colour codes to add another level of protection against tampering. I'm sure 99% of installs use the standard colours but you might just want to look in the control panel to make sure which colours are used for +/-, tamper & sense.

Did you manage to find if there was residual a/c on the 12v supply? You can do this easily by putting a multimeter on the 12v terminals (+/-) but set it to read AC not DC. This will "filter" the DC voltage and just read the a/c ripple, if any. This could be as low as 0.5v and still cause problems on an electronic device that is expecting to receive only DC volts.

Edited to add - colour comment, looks like yours is wired with standard colours anyhow.

Financial_Savvy

I have received the new PIR which I am about to fit.

I was going to:

Flick the fuse in the consumer unit for the alarm.
Open the PIR and then put the code in when the tamper goes off.
Take one cable out of the old PIR and connect into the new PIR, doing this one at a time.
Test new PIR.

Am I likely to mess anything up doing this?

Financial_Savvy

Just to say to everybody I have fitted new PIR and this has resovled the problem.

Thanks to everybody for their help.

My last question is should I turn the power off at the consumer unit to fit
the rest?

curlyfairy

You should have a 12vdc battery in the alarm panel so even turning the mains off will not kill the pirs,really you should diconnect this also.

Glad it worked out for you.


Ben.

pat888

I hope it's ok for me to barge in on this thread.
I have three PIR's in my house and they are working fine. I think they are at least 15 years old probably 20, should I change them?
Pat

curlyfairy

I would say leave them if you know they are working,if it aint broke.........If they are that old they are probably built better than todays ones anyway.


Ben.

pat888

Thanks for the prompt reply.
I have changed the battery in the control box, next I suppose I should look in the bell box.