Ed Robinson asks:
“I have a reverse loop that is controlled by a PSX-AR and I have added a quarry at the end of this loop that is controlled by a wye. I understand that this creates another reverse loop but that I can manually control the turnout at the end of the wye using a DPDT switch. My question is: what does this do to the PSX-AR sensing functions - with or without another loco in the original loop?”
It's a bit difficult to answer this question without knowing the lengths of the various tracks, and how you intend to operate engines/trains in that portion of your layout.
Having said that, this can be done with only one PSX-AR. There are several ways to wire this:
There are variations on most of those options depending on which makes the most sense for your track plan and how you intend to operate the area. If I were a better artist I’d draw out some examples for you.
Just remember, the track that creates the ability for a train to reverse itself isn’t necessarily the section that should necessarily be powered by the PSX-AR.
Let me know if you need more help with this!