stan2004 posted:Not clear what you have. From the Atlas website, it appears their signal heads come with a modular phone plug that snaps into a circuit board hidden in a shed. And the circuit board is looking for an insulated-rail trigger. Is this what you have? Model numbers if you know them would help.
If this is what you have, then you can use two Lionel 153IR occupancy detectors (or two MTH ITADs), to provide the equivalent of an insulated-rail-trigger. That is, the relay inside the 153IR could be configured to apply the outer-rail voltage via its "NO" terminal when triggered. The two "NO" terminals could be tied together going into the signal electronics so either (or both) would activate the signal.
Yes this is what I have. Tried tieing two signals together, the normally open (NO), to the DIN connection on both siginals. One worked fine, the other stayed at a constant yellow.
