2 pir 1 cable (can you loop)

[Needy]

Hi All

I have run a cable into the garage ready for a pir.

I have now decided that i would like 2 sensors in the garage but cannot run another cable in there

Can i loop the cable from 1 pir to another ??

Thanks

 

[yaleguy3]

Yes you can. You could have more than 2 pirs on a single zone wire. The problem starts when you want your panel to indicate which zone started the alarm and you have more than one room on the same zone so obviously you would not be able to tell if you were getting false alarms which pir was causing it. Bit like when the xmas tree lights don't work and you end up checking every bulb before you find the faulty one (usually the fiftieth one).
You would have to wire them in series for the tamper and sensor and parallel for the power

scroll down in this webpage to see a diagram.

http://www.letsfixit.co.uk/html/burglar_alarms.html

 

[Europlex]

You would have to wire them in series for the tamper and sensor and parallel for the power

.. or as this is a DiY alarm and as it has been assumed you are using a 6 core cable do it the following way.

Red / black 12v to both detectors

Blue / yellow to the first PIR alarm contacts

Green / white to the second PIR alarm contacts

You can then wire the detectors to their own individual circuits back at the control panel, (and forget about the Xmas lights).

Don't forget to 'loop out' the A/T half of these two circuits at the control panel, but as we don't know what panel you have, if it has a universal tamper circuit just forget about them.

OK, you've not got anti tamper at either detector, but in your situation is it really necessary?

If you only have a 4 Core cable it's possible to do the same thing but in a different way, not right as the above isn't, but it can be done, I'd have to write an essay!

 

[Ne11yboy]

Any chance you could write thats essay as I have a 4 core cable to 2 sensors that are back to back to each other in 2 rooms and I can’t get the buggers to work

im on a Eaton Ion40H and the keypad doesn’t like it

for some reason I feel it’s the power source as when I connect that to the Aux it throws out the wifi and the 12v Aux

so something about it, it doesn’t like.

I have 2 banks of 12v OV and there chocka with wires

can you get 12V off a different spot?
pics attached

note last 2 pics are how they were wired originally with No tamper and yellow blue opposite way around at N/C using no resistors……..

the other pic of PIR is his the others are wired

thank you

 

[SandyLyon]

From the Texecom Excel instructions

 

[Ne11yboy]

Thanks you

Trouble is I only have 4 wires for these two PIRs the rest are 6 wires but only using 4 as per the first photo with resistors.

that’s what’s confusing and I can’t get behind them and look as they are both been boxed into a bookcase and kitchen cupboards.

so no idea how they are wired up behind…

first phone is now the others are wired

second and third photo is how they were wired before.

then at label same as others in 4th phone but tht then seems to throw out the Power as it reads 12v Aux fault at panel


very frustrating, can I take power from elsewhere?

 

[Ne11yboy]

So if it’s wired like this? Does the Takper need to be bridged or with a resister? if the rest of the alarm is and 2k/4K is selected as choice sauce

 

[Ne11yboy]

Pic

 

[sparkymarka]

False alarm and may not work ….lol
whos installed that mess with wires wrapped around resistors and looks to be multiple wires in zones 4 and 5

 

[Ne11yboy]

Don’t Won’t name and shame them, as the guy took his own life…….

so just trying to sort this out without any more cost or upset to to anyone

difficult situation to say the least

 

[Ne11yboy]

That’s been rectified now and all sorted

it’s juts these 2 PIR on the same cable I need to sort and I’m done

so at…..

PIR 1 - I’ve wired as per the first photo
PIR 2 - I’ve wired as per the second photo

and at panel I have wired as this

with no resistors

and only option at keypad I have is a 2 wire with resisters

1-k/1k
2/4
4/7

so I’m gonna have to use resisters right?
like photo four but that didn’t work the first time but was coming through the tamper p

thoughts please gentlemen

 

[Ne11yboy]

Pannel and resister set up as remaining PIRs…..all working

 

[Handymanjo]

Do both detector cables go back to control panel?

Wire 1st pir as standard EOL
2nd pir put link from tamper terminal to alarm terminal, put 4.7k resistor across zone.
In control panel join both yellow wires together with connector block,then put blue wires in zone connection on pcb
As picture.
Hope this has made it clearer for you.

 

[Ne11yboy]

No they don’t they spured off the existing cables here’s the original wiring set up

PIR 1 first pic
PIR 2 Second pic
this is how I wired the other PIRs - third pic

 

[Handymanjo]

Wire as this rough diagram if both pir's are back to back.