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PIR sensor wiring

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  • 23-03-2021 11:36pm
    #1
    27061986a
    Registered Users Posts: 60 ✭✭


    Hi
    I was looking to install a standalone PIR sensor for external lights. The current set up includes to external lights controlled by two seperate switches; however they are from the same circuit. I was looking to install a one PIR sensor to activate both lights at the same time. Can this be done even though the lights are controlled by two seperate switches. I am hoping that when switch is in "off mode" this will then allow the sensor to turn on the lights and when switch is in "on mode" then lights will stay on permenantly (but only the relevant light connected to that switch).
    Is this possible?


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    #2
    alan4cult
    Registered Users Posts: 1,583 ✭✭✭alan4cult


    Yeah just make the PIR your third switch. Bring circuit live and neutral to the PIR (it needs neutral to operate but doesn't switch neutral) and from the PIR bring to live terminal of each light in turn.

    The problem is you won't be able to turn off the lights if the PIR is triggered, if you want to do this you either need an independent switch for the PIR or you can use a contactor to handle the switch off.


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    #3
    [Deleted User]
    Posts: 7,499 ✭✭✭ [Deleted User]


    alan4cult wrote: »

    The problem is you won't be able to turn off the lights if the PIR is triggered,

    Or switch them individually anymore because the switch wires are linked out at the pir :D


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    #4
    alan4cult
    Registered Users Posts: 1,583 ✭✭✭alan4cult


    BrownFinger wrote: »
    Or switch them individually anymore because the switch wires are linked out at the pir :D
    Yep this is true.


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    #5
    Bruthal.
    Registered Users Posts: 209 ✭✭Bruthal.


    It can be done where the PIR switches on a relay. Two N/O contacts in the relay then connect to the existing lights, either at the switches or the lights themselves.


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    #6
    Tredstone.
    Site Banned Posts: 59 ✭✭Tredstone.


    Bruthal. wrote: »
    It can be done where the PIR switches on a relay. Two N/O contacts in the relay then connect to the existing lights, either at the switches or the lights themselves.

    Ya that would be the conventional method

    Not sure is there a "smart" method . All too much effort and cost anyhow by the time it's done


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