(Topic ID: 209353)

Galaxy GI Relay woes


By Collin

1 year ago



Topic Stats

  • 24 posts
  • 7 Pinsiders participating
  • Latest reply 6 months ago by Eric_S
  • Topic is favorited by 2 Pinsiders

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  • Galaxy Stern Electronics, 1980

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#3 1 year ago

Socket looks like a standard "2 Form C" layout for 10 Amp relays.
Can you determine what the coil voltage is?
I have 24VDC and 48VDC coils for relays of this size. But you're probably looking at a 120VAC coil.
If it's a 120VAC coil then that would be something like a P&B part number K10P-11A15-120.

And... the more I look at it, it can't be an AC relay -> it has a back-EMF diode on the coil.
Need the relay coil voltage either from manual or measured voltage to get part number.

#4 1 year ago

Ah -- found photo.
*Stern* Galaxy with relay near rectifier board - GI Relay.
Powered from A2J2-2 --> solenoid power.
Use 48VDC relay:
Omron LY2-DC48 or Rayex LB2-48DS

#6 1 year ago

Bottom of socket shows it to be a 10 amp, "2 Form C" type footprint.
Found connections in Galaxy's standard cabinet wiring diagram. This only shows coil hookup and is hooked to the solenoid board A2J2-2 --> rectifier board's solenoid power output.

I do have both Omron and Rayex relays in stock on the relays page. Since it is socketed, you want the lug lead version.

11 months later
#8 8 months ago

Could be wrong coil voltage?
Measure the voltage across the diode.

#10 8 months ago

12V coil. I thought those were supposed to be 48V coils.
Trace back the wiring on the supply side and see which voltage that's connected to.

Also with 3 amp rating on switching. What size fuse is feeding that circuit?

#12 8 months ago
Quoted from MrBally:

And there is why the relays are burning up. Overheated coils.

That's what I thought as well.
But -- if you look at the photo, it looks like the contacts wire is burning.
I'm thinking that the coil being the wrong voltage AND the contact rating may be too low as well.

#15 8 months ago
Quoted from Quench:

Yep 48V coil relay. See post #4 above.

Yes - that was me that posted #4 above... I wanted to make sure but could not find that picture again.
So I did go through the connection diagram for Galaxy. The relay gets its power from A2J2-2 which is rectifier board, J2, pin 2 --> 48VDC.

Relay needed for replacement:
Omron LY2-DC48 or Rayex LB2-48DS

#17 8 months ago
Quoted from JohnEverson:

I assume the Omron is basically the same thing?
[quoted image]

Yup.

#20 8 months ago

What toasted on the LB2-48DS? There are two sections -- coil and contacts.
Look at the wrapper on the coil -- does it say "48VDC"? It's not like I ever grabbed a wrong relay before...

1 week later
#23 8 months ago

That would be because that Ed character gets overwhelmed with orders from time to time and has to close up to catch up on orders. January/February tend to be the busiest months. Should be back up and running in a few days.
Another option would be an Omron LY-DC48. These cost more but tend to be easier to find.

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