Reply to "switch direction lights"

stan2004OGR Forum Member

San Diego Frank posted:
...
I tried wiring a block signal 153 but the red light goes on when the switch is thrown, but immediately goes off. Same with the green light.
...

It sounds like the red or green light turns ON for exactly 1/2 second when the AIU momentarily drives the turnout coil. In other words backwards behavior. The red or green light should turn OFF for exactly 1/2 second when the AIU momentarily drives the turnout coil.

Is the common wire of the block signal connected to the "IN" terminal of the AIU Switch port?

Same issue if rolling your own LED indicators; the common wire for the red and green LEDs should connect to the "IN" terminal of the AIU Switch port. One LED will always be ON and will momentarily turn OFF for exactly 1/2 second when the AIU fires the turnout coil to change to the other LED.

7/17/186:29 PM

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