relays

[kiggie89]

can any one give me the connections for a hager relay its a ER 125 single module the clickes onto the din rail i have been tyold that a1 and a2 is coil and that if i link 2 and 4 they be come common but i need to know what 1 and 3 are? one is N/O and other is N/C but i just dont know witch way round they are

thanks

 

[Jonesy83]

cant you test with continuity tester

 

[bugsy]

a1/a2 coil 1-3 normally open 2-4 normally closed, but check cause this is of the top of my head.

 

[kiggie89]

dint know if it had to be live to make all contacts work i have never done one befor lol

 

[Sintra]

An Er 125 as far as i am aware is a relay with 1 N/C & 1 N/O contact therefore 1 & 2 are a N/O contact and 3 & 4 are a N/C contact.

As bugsy says check as this is off the top of my head also.

 

[kiggie89]

that sounds right mate from picture on the front. on my other drawin it says i need a common do i just link the two N/C

 

[kiggie89]

i am lost now 2 diff answers

 

[RogertheBodger]

What do you want to do with it? What are you switching?

 

[kiggie89]

its switching a domestic heating pump. its to do with a ground source heat pump. it needs an external pump to help with the pumping on the heating side. i am only working from a drawing and this part is not on that.

i have to slice into two wires from the diagrams i have one goes to common and the other one goes to N/O

 

[Sintra]

Just find with a continuity meter the N/O contacts, they will be opposite each other on the relay and put one cable in each there is no common on this type of relay.

 

[RogertheBodger]

When one pump comes on, you want the relay to bring on the other pump? which pump is already online?

 

[kiggie89]

or ok thanks just hope it goes ok this heat pump is £8.000 lol

 

[kiggie89]

all i know is that the pump in the ground heat pump runs both heating and hot water and the external pump just want to pump the heating so i have to slice into two wires one goes into common and other into N/O thats wat i have been told

 

[Lofty]

Hi,
looks from this pic of the ER125

1-2 are N/O and 3-4 N/C A1-A2 are coil.


hope this helps you.

Cheers,
Lofty.