Dual master/slave outside lights

ericmark · 2 Feb 2024

Since it has a neutral connected likely it will work. And it is unlikely to cause danger, I would swap the three connector block and crimp for a 4 connector block and give it a try, I would bench test first in case it does not work.

EFLImpudence · 2 Feb 2024

klaus_k said:
either can be a master,

I disagree; they are both masters (all the time).

klaus_k said:
in which case it become the master of the other lamp, which is the slave.

Well, not really. I don't think that is what the term means.
It would, if appropriate, refer to the PIRs (switches); not the lamps.

It is no different than two one-way switches operating two lamps.
If one PIR turns on the two lights; the other PIR cannot turn them off.

SUNRAY · 2 Feb 2024

To OP.
I have heard people call the arrangement you require as 'All master', 'Master/master'. You seem to be describing quite well your requirement, using 'master/slave' and understanding they also work as 'slave/master' (ie in both directions).
From what you say, basically you have a PIR fitting capable of switching 100W, assuming the bulbs are mains voltage (and the red wire is switched mains) there is unlikely to be any issue with using one unit as a master to switch12W worth of bulbs.

As I've already mentioned I have not yet encountered any damage when used in this set-up.
The only issue will be if a second fitting linked as shown In my sketch and the PIR sensor is not suitable to have mains applied TO to red wire when operating as the slave device.

SUNRAY · 2 Feb 2024

EFLImpudence said:
I disagree; they are both masters (all the time).

Well, not really. I don't think that is what the term means.
It would, if appropriate, refer to the PIRs (switches); not the lamps.

It is no different than two one-way switches operating two lamps.
If one PIR turns on the two lights; the other PIR cannot turn them off.

I believe that is the arrangement OP is seeking, ie if either or both PIRs switch on the 2 lights, they will not extinguish until both PIRs turn off. A system which has been installed in many locations and operating successfully.

EFLImpudence · 2 Feb 2024

Yes, I know.

I was just querying his definition of it as "master/slave".

klaus_k · 2 Feb 2024

You are correct!

klaus_k · 16 Feb 2024

FWIW, the hack worked a treat

Biggest issue was finding a couple of hours when I could work outside, when it wasn't raining. Thanks for all the help provided

Take care.

SUNRAY · 16 Feb 2024

klaus_k said:
FWIW, the hack worked a treat Biggest issue was finding a couple of hours when I could work outside, when it wasn't raining. Thanks for all the help provided Take care.

Thank you for the feedback, it makes our effort worthwhile.

klaus_k · 16 Mar 2024

Follow-up - fwiw I am now a ferrule-fan. Much easier than fiddling with wires that keep untwisting.

FrodoOne · 17 Mar 2024

klaus_k said:
I currently have two outside lights, each with a PiR sensor. They have developed a fault so that the sensor only works some of the time.

This is an excellent reason for NOT using Lights with Integrated PIR sensors

klaus_k said:
I would like to replace these and reconfigure it so that I have two masters - i.e. either sensor can light both lights. Can somebody please advise on the wiring configuration? Ideally with a picture/diagram. Thanks KK.

My recommendation is to use two (or more) PIR sensors and two (or more) lights.
Place the Sensors where they are needed and
the Lights where they are needed,
making sure that the Lights do NOT shine on and affect any Sensor.

A suitable (basic) circuit is this :-

Installation of the "Isolation Switches" is recommended, since it makes it easier to adjust each PIR individually without "sensing" by the other PIR "confusing the issue".

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Dual master/slave outside lights

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