12V Dual Pole Relay connections...

albertc30 · Sep 18, 2014

Hi all.

I have just received a 12V 2 pole 2NO and 2NC and there's no instructions on how to connect it to the power.

Normally being a coil negative swapped with positive would make no difference however, this has an LED light and a resister.

I am thinking the 12V life wire should before the resistance?

Any help much appreciated.

Thank you.

Albert

Darkwood · Sep 18, 2014

12v DC?.... positive and negative are terms associated with dc can you confirm this?

What is the relays function in the circuit?

Has the LED got a driver with it if AC supply?.... Your post is very vague at best and alot of assumptions need to be made to answer it, please give more details about what you want the retail to do, what operates it and any other info you haven't divulged.

HandySparks · Sep 18, 2014

Do you have the manufacturer's name and part number for this relay?

albertc30 · Sep 18, 2014

HandySparks said:
Do you have the manufacturer's name and part number for this relay?

Hi all.

Apologis as I am new to this relay thing.

This relay is to power a 12V DC submersion water pump.

It will work with 1 top water lever floating switch which will pass 12V DC to one of the poles with will also be connected to the coil input.

The second floating switch, connected in series with the first one, with activate pump once lower water limit level has been reached.

Once this lower lever is above and cuts out the power to the pump, it will carry on working due to being energized with power coming from the one pole which has been energized previously, so it should continue being energized.

Once the 1st floating switch cuts out it will then cut the supply to that set of pole connection on the relay, cutting it's source of power altogether.

The relay switch is an OMRAN LY2N-J. Again, I apologize since I din't even looked on GOOGLE about this particular model. Always on google and even googled if polarity could be reversed.

I am only worried since there is a resister on the input side of the coil connected to an LED which connects to the other end of the coil, negative? I don't know.

I am wondering is this resister here to limit the amount of voltage being feed to the LED?

Many thanks in advance.

Albert

DPG · Sep 18, 2014

Yes, the resistor is a current-limiter for the LED. And yes, polarity matters for the LED, although as you say, not actually for the coil. Daz

albertc30 · Sep 18, 2014

DPG said:
Yes, the resistor is a current-limiter for the LED. And yes, polarity matters for the LED, although as you say, not actually for the coil. Daz

I can now say that after close look the LED and resister are connected in parallel with the coil.

Thanks for all the help.

Bobster · Sep 18, 2014

http://www.farnell.com/datasheets/68107.pdf

albertc30 · Sep 18, 2014

RoB2 said:
http://www.farnell.com/datasheets/68107.pdf

Wow. This is way too technical.

I am looking at page 9 and can't find my particular model.

2nd picture down DC model seems the close one to mine. However, I am in doubt as it says positive on pin 8. Well pin 8 is before the led and the resister. I really thought positive side would be on pin 7 which feeds the resister which in turn is connected to the LED.

Sorry for my ignorance.

Bobster · Sep 18, 2014

The relay itself will have a circuit diagram. It will also show A1 and A2, A1 being positive and A2 ground.

albertc30 · Sep 18, 2014

RoB2 said:
The relay itself will have a circuit diagram. It will also show A1 and A2, A1 being positive and A2 ground.

No A1 or A2 I'm afraid but I just noticed a drawing which matches page 9 AC model.

Not happy as I should have got a DC one

albertc30 · Sep 18, 2014

New Coil Power Relay 8pin 2NO 2NC HH62P L LED Lamp 10A DC12V DPDT | eBayI got this one which states DC but the diagram on the back is the same as the one on the manual shown as AC

tazz · Sep 18, 2014

Have you bought the connection base to go with the relay.....usually the base comes with diagram, and the pins are printed on the side of the relay..

albertc30 · Sep 18, 2014

tazz said:
Have you bought the connection base to go with the relay.....usually the base comes with diagram, and the pins are printed on the side of the relay..

Did do but there was no manual, just the base.

The pins are also numbered as you mentioned.

tazz · Sep 18, 2014

Post a photo of the pin numbers on the side of the relay....this will help to id for you

Richard Burns · Sep 19, 2014

The picture on the ebay site shows that the coil has 12V dc written all over it, however the main picture does show the ac diagram on the relay cover.
The datasheet on the relays posted by Rob2 shows the pin out diagram and the wiring arrangement that should be fairly clear cut.

[ElectriciansForums.net] 12V Dual Pole Relay connections...

The position of the resistor should be immaterial for the circuit, but the pin 8 positive matches with the diagram.
The easiest way to find out would be to connect a 12V supply and see if the LED lights up!