Note: using ground or neg side for signals to the PLC is easier. . Example O27 isolated tracks or Z-stuff Signals … Also using output cards with relays
makes it easy to control AC to the tracks......
Dan,
If you already have non DCC trains and your up for it..... I have O27 / O42 … I'm using SLC505 and it can be stuff to get it to do what you want...
lots of testing.... I came up with ways to switch remote switches, change signal lights, turn on and off sections of track... I built my...