Reply to "I Need Help! How do you wire an MTH Railking O Scale 7 Light Signal Block #30-11013 with Isolated Rail and/or Relay, Not with an ITAD?"

stan2004OGR Forum Member

The diagram is correct.

Trigger+ is from the diode (side with the band). Trigger- is from isolated track.

Yeah, I see now the video can be confusing since the trigger- wire is orange which does not match diagram (blue). And it just happened the 14v ac in video came from right side and I just happened to wire in diode on right side. But the band side of diode is on the left in video and then goes to trigger+ with white wire. Sorry about that!

Possibly too-much-info but one thing I like about this particular timer relay module is that it has an electrically isolated trigger input. Hence it requires 2 trigger wires, a + and a -. They chose GND-T to label the trigger- which is potentially confusing. But that's a separate discussion we can have (or not) after you are up and running. ☺

9/15/2211:05 AM

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