Indigo Domotics

Hi all,

Trying to get my head around how to wire up a Fibaro relay to control a 12v device (lock plate).

If my understanding is correct I'll use a normal UK 3 pin mains plug and wire that to the Live and Neutral terminals of the Relay.

Then I need a separate 12v power supply that I wire one side to the relay IN, then a wire from Q1 to one side of the device, then the other side of the device to the other side of the 12v PSU.

Wiring side makes sense I think.

Physically in terms of any required separation etc what do I need to do?

I have a twin plug socket in exactly the right place. Can I simply wall mount a single gang enclosure, run the wire from the mains plug and the 12v psu up and into the enclosure and job done?

Or are there some concerns I should have around separation etc?

Also...what do I do about the Earth wire from the UK mains plug?

Cheers all

Noel

Specifically which model of fibaro relay are you planning to use?

Fibaro FGS-222 Dual Relay Switch I think is the one.

Believe there's two options a 1 channel or a 2 channel with just a few £'s between them so figured go for the dual channel in case I come up with a use for the 2nd channel in the future.

Think that's the cheapest way to do what I'm after.

I assume this is in regards to your door lock?

If so i suspect you'd be better off with a low voltage relay from Qubino. I'm always warey of controlling low voltage devices with mains devices unless an iscolated relay is involved.

Yes that's right, thought I'd be better starting a separate post just on this bit.

Aah I didn't know the Qubino's were low voltage ,yes that would be much better I'll take a look.
Cheers
Noel

Yeah.. that’s what I’d do. I seem to recall the relay 1D being viable for something similar I wanted to do with an interior door (ended up with an alternative solution in the end)


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Thanks for the tips.
By the looks of things I can get a Qubino relay that needs 24V. So I have 2 options

1 - Use a single 24V power supply, assume something like this will do and cut the connector jack off? http://cpc.farnell.com/powerpax/psk315- ... 20supplies

From there I'd have parallel feeds to the L and N terminals on the Qubino - to L and + to N from another post I've seen, and then the other parallel feeds to the IN and the door latch.

This would require me to get hold of a 24V electric latch plate which I think is possible but may be considerably more expensive

Option 2

Use a 24V power supply for the relay L and N and then have a separate 12V PSU for the door latch.

Have I understood that right?

If there's PSU's available with multiple voltage outputs available simultaneously that would be great but suspect tricky within a neat compact size without resorting to PC PSU's etc. Ideally i'd have something neat like a plug in PSU with two wires coming from it that I can simply cut the connector off and wire into the connector blocks.

Thanks
Noel

Spotted this on amazon JnDee™ 4 way DC splitter Cable Connector Jack for CCTV 3V 6V 9V 12V and 24V power supply, 1x female to 4 x male connector https://www.amazon.co.uk/dp/B011CMDZJM/ ... VAbEZ6Z13S

If I can get a 24v version of the door latch then any reason why I couldn’t use this to split the power? Current draw I don’t think will be an issue with a door latch and a relay.

Yeah I’d go with a 24v latch.. (well no I wouldn’t as I said before.. but as you’re determined to continue ).. also get some of these.. much easier than cutting the ends of wires and splicing:

https://rover.ebay.com/rover/0/0/0?mpre ... 1795642067


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EDITED below with the answer but i'll leave here in case it helps someone:

All the bits have arrived but i'm a little confused on the wiring!!

So Relay has L and N connections that need to be fed from the 24V PSU

- connection to L
+ connection to N

Then on the relay it has Q1 which is the feed to trigger the 'load' i.e. my door latch.

On the door latch I have two wires which are identical and are simply for power to be applied. When power is applied its unlocked. When power is removed its locked.

So if I connect one wire from the latch to Q1 what do I do with the second wire?

This needs to complete the circuit when Q1 power is applied, what I don't know is whether Q1 is + or - (or whether it matters).

My assumption is I put the second wire into either the L or N terminals just not sure which and the likelihood of me knackering it if I get it wrong.

Answer that I've had from the lock company is that relays normally break the circuit on the negative.

So solution (that I now have working) is to wire one wire from the latch to the positive i.e. the N terminal on the relay in this case and the second wire to the Q1 terminal.

All now working on my test bed

Chisels to be taken to the door frame tomorrow hopefully!!!

Thanks all

Noel

Might be worth drawing a diagram of it and posting it.. one for other folks.. and for yourself when inevitably in a couple of years you’ll need to refer back to it


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Good point
Image attached. It’s actually in the manual which once someone had explained to me now makes perfect sense!!

Ah yes just standard wiring for these modules.. excellent


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