When I built the boards, I insured that all of them had a reset window greater than 900ms. I set my top limit at 1100ms, most of the boards are centered around one second.
Stan, here's the test I did for each of Paul's modules when I had them.
- I paralleled the DCS-RC outputs with the reset board installed directly across the TIU output channel.
- I connected the TIU to power and turned it on. TIU input channel power remains on for the rest of this test.
- I waited for a few minutes as the Rev. L watchdog is pretty long, seems about 45 seconds.
- I placed the PS/2 locomotive on the tracks and connected the TIU power to the tracks at the track.
- The locomotive comes up dark and silent.
- I then disconnected the track power and the DCS-RC from the TIU output and connected the track power again.
- The locomotive comes up in conventional mode with sound and lights.
- I then disconnected the track power, reconnected the DCS-RC to the TIU outputs.
- I connected track power again.
- The locomotive comes up dark and silent.
After further discussions with Paul, I decided on one more test. This was only with one module, I assumed the others would perform in a similar manner. Paul had mentioned that the engine stayed dark for about 45-60 seconds and then started up. I can't explain why this would happen short of a power interruption as once they recognize the WD, they should stay dark until started.
I took one of the modules and did the following test.
I connected DCS-RC output terminals with the WD board installed directly across the TIU output of Fixed #1. That TIU channel is connected to a roughly 40 foot loop of track with an 8 foot siding with a switch on the center rail to power it. I placed a PS/2 engine on the siding with power off. I left the TIU and DCS-RC running for about 5 minutes to insure the TIU WD had expired, then flipped the power on to the siding. After 5 more minutes, and the engine was still dark.
I turned the siding off, and unplugged the DCS-RC from the TIU channel connection. I flipped the siding power on and the engine came up in conventional in a couple of seconds.
I repeated this test three times to insure it was a repeatable result. In all cases, the DCS-RC with the reset board installed kept the engine dark for at least 5 minutes. I'm assuming it would have stayed dark until addressed.
If there's something I missed, let me know. 
