Smiths 4 wire low voltage PIR required

Mutley00 · Dec 18, 2014

One of theses PIRs has given up the ghost on my (very old!) security lighting system. Everyone I've asked tells me there is nothing compatible in todays market, so I'm hoping someone has got an old one gathering dust somewhere.

I'll happily buy more than one if you've got any from an old system.

Thanks

telectrix · Dec 18, 2014

are the GJD ones compatible? they operate on 12V.

tazz · Dec 18, 2014

Have adapted GJD opals into many different systems, basically have 2 switch neg outputs, so can be used to switch relays or other controllers.

Mutley00 · Dec 18, 2014

telectrix said:
are the GJD ones compatible? they operate on 12V.

tazz said:
Have adapted GJD opals into many different systems, basically have 2 switch neg outputs, so can be used to switch relays or other controllers.

GJD ones are compatable apparently. Their helpline told me you need to incorporate 2 resistors into the control box which is way above my electrical knowledge!

Can you simplify your reply please tazz. I have a lead coming out of the control box with red, blue, black & yellow wires coming out of it, connected to the duff PIR with a red, blue & black and a green which attaches to the yellow.

Is this something a sparky numpty like me can sort out easily?

tazz · Dec 18, 2014

Can you post the exact smiths model , or give manual information .....stating colour of cables is not helping, we need to know what terminal they are connected to.

amlu · Dec 18, 2014

pyroelectric infrared pir motion sensor detector module hc-sr501
12v input, ground, 12v pir output with adjustable sensitivity and time delay.

Mutley00 · Dec 18, 2014

amlu said:
pyroelectric infrared pir motion sensor detector module hc-sr501
12v input, ground, 12v pir output with adjustable sensitivity and time delay.

That doesn't look very weatherproof!

tazz · Dec 18, 2014

Think there is a slight difference between a 7m range circuit board and a purpose made 35m range gjd External PIR Detector | PIR Sensor | Infrared Detectors | GJD Opal XLGJD

Mutley00 · Dec 19, 2014

In the Control Box, Red goes to +, Blue goes to P, Yellow goes to T and Black goes to OV.

I've got piccies of the PIR & Control Box if you want to PM me your 'naked' email address as this Website only allows downloads from URLs. There is no model number on the PIR - it's black about 4 inches wide & 2 inches high & 2 inches deep. The connections in the PIR are labelled R, Y, BK & Bl

Thanks for your time on this 'tazz'.

tazz · Dec 19, 2014

When posting photo, click on image icon, in new message box click, top my computer instead of URL. Select file from your computer, the click upload.

Mutley00 · Dec 20, 2014

Sorry dont understand?

tazz · Dec 20, 2014

As you are posting here....you will see icons above for text size etc.
click on third icon from the far end right.
This will open new box, click top icon from computer.
click choose file, and select file from your computer.
Then click upload...and wait till you photo or file is displayed

Mutley00 · Dec 20, 2014

I don't have the 'from computer' option. I can only see 'Add an Image from URL'

tazz · Dec 20, 2014

Very strange, try the same method in a private message to me

tazz · Dec 20, 2014

Ok got email with photos, but didn`t really show anything......So I can only make a good guess, where we can test out at the panel.....Would suggest red is 12v+ Black is 12v-, green and blue i would think are trig 12v- inputs, one being alert working day & night, and the other input being night input, controlled by light sensor in pir.
So suggest test theory with a short cable (only test on the 12v side) short out blue to black and see if it sounds or clicks in the relay, then do the same with the green terminal, short to black.
If i`m correct one will bring on alert sounder, the other will bring on lighting relay.
After this test we can then work out GJD connections.