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Topic Title: PIR Detector
Topic Summary: Multiple wiring??
Created On: 21 April 2009 10:12 PM
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 21 April 2009 10:12 PM
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Avatar for 74jools.
74jools

Posts: 408
Joined: 02 March 2008

Hi Guy's,
Having a mental block! or Senior Moment! Most PIR lights and sensors have terminals to wire slave lights, thats straightforward. Village Hall I looked at today has had one of the three stand alone PIR's burn out, ok, easy to replace, but trying to get my head around how they are wired? From memory there are around 10 to 12 lights that can be switched on from any one of the three PIR's. Obviously they are not wired like internal two way or three way switching, is it just a case of all switched lives linked together?
 21 April 2009 10:25 PM
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Avatar for rocknroll.
rocknroll

Posts: 8824
Joined: 03 October 2005

The live and neutral feed goes to L and N on each PIR, the SL and N goes to each light and if you need an overide switch then a three core to the PIR to liven up the SL terminal.

regards

-------------------------
"Take nothing but a picture,
leave nothing but footprints!"
-------------------------
"Oh! The drama of it all."
-------------------------
"You can throw all the philosophy you like at the problem, but at the end of the day it's just basic electrical theory!"
-------------------------
 21 April 2009 10:31 PM
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Martynduerden

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A PIR is Just a sensor operated relay hence the coil is controlled by the sensor operating a contact, much that same way contractors are operated, 10-12 lights on one pir sounds quite alot, could be 100w / point in which case would likely be OK.

As for the wiring You will have L supply and Neutral to common terminals for the functioning and a switched L from the relay.

you could have multiple cables from ther relay but wiring would be difficult given the usual physical size of those things.

-------------------------
Regards

Martyn.

Only a mediocre person is always at their best



www.electrical contractors uk.com
 21 April 2009 10:31 PM
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antric2

Posts: 1049
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So manylights through PIR is too many.
I am sure the max is 1400 or maybe 1700w and that does not allow for the inrush.
I have a customer who has many lights switching via PIR but the PIR operates a heavy duty contactor\relay to power load the lights thus saving the PIRs.
 21 April 2009 10:32 PM
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Martynduerden

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Originally posted by: rocknroll

The live and neutral feed goes to L and N on each PIR, the SL and N goes to each light and if you need an overide switch then a three core to the PIR to liven up the SL terminal.



regards


A direct live to the SL terminal could blow the unit.....VRRM

-------------------------
Regards

Martyn.

Only a mediocre person is always at their best



www.electrical contractors uk.com
 21 April 2009 10:33 PM
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antric2

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What type of lights are being switched?
 21 April 2009 10:38 PM
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Avatar for Martynduerden.
Martynduerden

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Originally posted by: antric2

So manylights through PIR is too many.

I am sure the max is 1400 or maybe 1700w and that does not allow for the inrush.

I have a customer who has many lights switching via PIR but the PIR operates a heavy duty contactor\relay to power load the lights thus saving the PIRs.


The PIR's I have used are 2000w rated Incandescent, and are essentially just relays.

-------------------------
Regards

Martyn.

Only a mediocre person is always at their best



www.electrical contractors uk.com
 21 April 2009 10:38 PM
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rocknroll

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Originally posted by: Martynduerden

Originally posted by: rocknroll



The live and neutral feed goes to L and N on each PIR, the SL and N goes to each light and if you need an overide switch then a three core to the PIR to liven up the SL terminal.


regards


A direct live to the SL terminal could blow the unit.....VRRM


Well it works okay on my 8 drive lights with a PIR at each end. I'll send you a wiring diagram as your not sure.

regards

-------------------------
"Take nothing but a picture,
leave nothing but footprints!"
-------------------------
"Oh! The drama of it all."
-------------------------
"You can throw all the philosophy you like at the problem, but at the end of the day it's just basic electrical theory!"
-------------------------

Edited: 21 April 2009 at 10:41 PM by rocknroll
 21 April 2009 10:46 PM
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Martynduerden

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Originally posted by: rocknroll


Well it works okay on my 8 drive lights with a PIR at each end. I'll send you a wiring diagram as your not sure.



regards


Good, But I have seen some blown, just a cautionary note.

Some of the better PIR's operate on a 2 switch operations in less than 10 seconds will keep them on.

-------------------------
Regards

Martyn.

Only a mediocre person is always at their best



www.electrical contractors uk.com
 21 April 2009 10:58 PM
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74jools

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Originally posted by: rocknroll

Originally posted by: Martynduerden



Originally posted by: rocknroll







The live and neutral feed goes to L and N on each PIR, the SL and N goes to each light and if you need an overide switch then a three core to the PIR to liven up the SL terminal.





regards




A direct live to the SL terminal could blow the unit.....VRRM




Well it works okay on my 8 drive lights with a PIR at each end. I'll send you a wiring diagram as your not sure.



regards



Just been trawling Google for circuit diagrams but can't locate any
 21 April 2009 11:02 PM
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Martynduerden

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What make/model is it ? do you know the terminals yet?

-------------------------
Regards

Martyn.

Only a mediocre person is always at their best



www.electrical contractors uk.com
 21 April 2009 11:14 PM
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Avatar for rocknroll.
rocknroll

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Originally posted by: 74jools

Originally posted by: rocknroll

Originally posted by: Martynduerden

Originally posted by: rocknroll

The live and neutral feed goes to L and N on each PIR, the SL and N goes to each light and if you need an overide switch then a three core to the PIR to liven up the SL terminal.

regards


A direct live to the SL terminal could blow the unit.....VRRM


Well it works okay on my 8 drive lights with a PIR at each end. I'll send you a wiring diagram as your not sure.

regards


Just been trawling Google for circuit diagrams but can't locate any


There you go!

http://i641.photobucket.com/al...ngofrocknroll/PIR.jpg

regards

-------------------------
"Take nothing but a picture,
leave nothing but footprints!"
-------------------------
"Oh! The drama of it all."
-------------------------
"You can throw all the philosophy you like at the problem, but at the end of the day it's just basic electrical theory!"
-------------------------

Edited: 21 April 2009 at 11:15 PM by rocknroll
 21 April 2009 11:21 PM
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Martynduerden

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RnR what model of PIR are you using I would like to be able to link the SL occasionally.

-------------------------
Regards

Martyn.

Only a mediocre person is always at their best



www.electrical contractors uk.com
 21 April 2009 11:37 PM
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Avatar for rocknroll.
rocknroll

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Not really sure what your nitpicking about again, I have given you the standard arrangement for switching all the lights using multiple PIR's.

regards

-------------------------
"Take nothing but a picture,
leave nothing but footprints!"
-------------------------
"Oh! The drama of it all."
-------------------------
"You can throw all the philosophy you like at the problem, but at the end of the day it's just basic electrical theory!"
-------------------------
 21 April 2009 11:41 PM
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Avatar for 74jools.
74jools

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Thanks for the diagram RnR

Julian
 21 April 2009 11:44 PM
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Avatar for Martynduerden.
Martynduerden

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Not nit picking! but every time I have ever come across SL linked the PIR has been damaged, just a fact, most pir's do not need a SL terminal to be linked as they manage this them selves however some obviously don't as you have pointed out and I can see a use for this so I was mealy enquiring as to the make and model?

I'm not going to go in to VRRM but there are few fixes available.

-------------------------
Regards

Martyn.

Only a mediocre person is always at their best



www.electrical contractors uk.com
 22 April 2009 11:59 AM
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AJJewsbury

Posts: 11268
Joined: 13 August 2003

I've always arranged for an override to link L to SL on a PIR - effectively the same as wiring several PIRs in parallel as R&R suggests - must have used a dozen different manufacturers/models over the years and never had a problem.

- Andy.
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