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Discuss 24vDC relay to Switch 230vAC light circuit in the New Member Introductions area at ElectrciansForums.co.uk.

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  1. Mr.Snake
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    Mr.Snake New EF Member

    Location:
    UK
    Hi Guys,

    New to the forum, and probably posting this in the wrong place but hope you can help.

    I have a garage door control panel that has a 24v dc output (4 W max) that activates when the door is in operation. I want to use this to activate my relay and switch the live to a 230v light circuit on.

    The relay is an MK3P-i:
    [​IMG] [​IMG]

    Can you elaborate on how this relay functions? The diagram is confusing me :)

    Thanks Mr.S
     
  2. diditrain
    Online

    diditrain Electrician's Arms

    Location:
    north west
    I`m no expert, but when your coil is energised 2 and 10, you will have 3 switches making:
    1, 4 and 5 is one switch
    3, 6 and 7 is another switch
    11, 9 and 8 is the other switch
    1, 3 and 11 are your common contacts
    4, 6 and 9 are your normally open contacts
    5, 7 and 8 are your normally closed contacts
     
    • Like Like x 1
  3. westward10
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    westward10 In echoed steps I walk across an empty dream. Staff Member Moderator

    Top Poster Of Month

    Location:
    Northamptonshire
    The 24v dc coil is terminals 2 and 10, apply 24v dc to these two and the relay is energised. Terminals 1 and 11 are both common so you could connect line and neutral for the 230v to each of these or just the line to one of them. Connect the outgoing line and neutral to 4 which corresponds with common terminal 1 then 9 which corresponds with common terminal 11. I think, tis early morning.
     
  4. Wilko
    Online

    Wilko Electrician's Arms

    Location:
    Berkshire
    Business Name:
    Wilko Electrics
    Hi - it uses 24V DC to operate the relay (good) and you want to use a switch inside it to operate a 230V AC light (also good as it says rated to 250V and 5A). Using the 24V door controller output the relay may only be energised when the motor needs to be on (i.e. for 20 seconds while door is moving ...). Remember safety safety safety. Maybe you need a remote control for your garage light? Or a new motor unit with built in light and timer?
     
    Last edited: Feb 22, 2018
  5. marconi
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    marconi Respected Member

    As you describe things, the use of the 24V dc output to control a relay to turn a lamp on, will result in the lamp being lit only while the door is in operation/moving; the lamp will extinguish when the door comes to rest.

    I suggest you check carefully what the instructions/specification for the control panel say about this 24V dc output. It may - I repeat may - have a timed on period suitable for the purpose you have in mind but you could be disappointed if it does not.
     
  6. Wilko
    Online

    Wilko Electrician's Arms

    Location:
    Berkshire
    Business Name:
    Wilko Electrics
    Ha - so much for reading and comprehension skills o_O
     
    • Funny Funny x 1
  7. PEG
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    PEG Respected Member

    Location:
    Manchester
    Hi,do you realise that the light would only remain on,during the operation cycle?

    There is nothing more annoying,than seeing the last few closing inches,traps a pet/toy/finger.....and then be plunged in to darkness:eek:

    Also,be aware that if your door actuator and lighting are fed from two different circuits,you have some other considerations to apply.

    Depending on what you are desiring,a better system may be arranged using a PIR set-up.
     
  8. Mr.Snake
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    Mr.Snake New EF Member

    Location:
    UK
    Thank you that's confirmed my original guesses...
     
  9. Mr.Snake
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    Mr.Snake New EF Member

    Location:
    UK
    The door is remote controlled and has various timer features etc, luckily the unit has a bulb inside it which lights up during door motion and stays on for a minute or two after the door has finished moving. So you can see where you are going when inside but outside i just wanted to mimic this with a light circuit i have already wired up to a switch inside.

    The door actuator is just plugged into the plug circuit with a regular iec mains lead. I'm planning to run a live tail from the light breaker to terminal 1 on the relay and then terminal 4 on the relay to L2 on the light switch. - I would assume this is all fine.
     
    Last edited: Feb 22, 2018
  10. Spoon
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    Spoon Forum Mentor

    Location:
    Lancashire
    As mentioned above: What circuit is the door wired to?
    Where are you mounting the relay?
    So the relay will replace the switch and not work in conjunction with it?
     
  11. Mr.Snake
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    Mr.Snake New EF Member

    Location:
    UK
    As mentioned above in my last post the Door Control unit is plugged into a sockets circuit. This also powers the door motor.

    The relay will either be mounted in a new small breaker box specifically for the relay only, or in the main breaker box which would be easier and involve less routing of cables. - Not sure if there is any reason i can't mount it in the main box so please advise on this.

    The 230v output from the relay will be wired into L2 on the light switch.

    If I'm right this should mean that when the light switch isn't at (L1) position [Lights on permanently] They will be off unless power is provided to (L2) via the relay.
     
  12. Wilko
    Online

    Wilko Electrician's Arms

    Location:
    Berkshire
    Business Name:
    Wilko Electrics
    Hi - if the garage opener already has a light with a timer why not just extend this out?
     
    • Like Like x 1
  13. davesparks
    Online

    davesparks Forum Mentor

    Location:
    guildford
    I can think of a couple of reasons, that relay won’t be designed or approved for fitting in the CU by the manufacturers.
    Also having 24V cabling inside the CU needs careful thinking about and attention to the regulations or else a dangerous situation could occur.
     
  14. PEG
    Offline

    PEG Respected Member

    Location:
    Manchester
    Right,so you have a 24v lamp,on the actuator,and you are extending the feed to this,to your relay,in a separate enclosure,where you intend to link a lighting circuit feed,to the switched live in your outside light?
     
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