The Digitrax AR-1s are very slow because they are a mechanical relay, and hence keep the reverse short on the layout for an electrically long time. The PSX is fast, so it trips first. The best solution is to switch the AR-1s to PSX-ARs. Since the PSX-AR is a breaker AND a reverser, you can run it directly from the booster and still have short circuit protection AND reversing capability.
- Set CV55 to 1; CV55 tells the PSX to initiate a delay before tripping. Remember that this will prolong the short on the layout.
- Try setting CV65 to 160. CV65 tells the PSX how long to delay in 1/8 ms increments. A value of 160 will delay the PSX by 20 ms, which is most likely to work.
You can set CV65 as high as 255, but the ideal value is the smallest number that consistently allows the AR-1s to work without interference.