Messages From digitrax

 


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#196374 May 23, 2014

To set the stage:

1 DCS2002 DB200

When trains cross blocks from one powered by the DCS200 and either DB200they stall, spark, and generally misbehave.

Have checked all points where the DCS and DB200s interface and all see tobe property phase, at least if I use a DC meter, all rails have the properpolarity, no " " running into a "-"

When I measure DC across the tracks, both DB200s give a reading from around0.20 to 0.22, but the DCS200 gives a reading on 0.02, 10x lower.

Is this the problem? The huge difference between the units?This probably not the best way to measure these things, but I don;t know anotherway. I was first checking mainly for polarity/phaseasynchronybetween blocks and then noticed the voltage difference.

Thanks for any help.

Jerry Michels



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#196375 May 23, 2014

Try reversing rail A and rail B on one of the boosters. I had that problem with my dcs100 and db150. I reversed the rail A and B wires on the DCS 100 and no more shorts. To test this take a coin and put over the gap on the rails. If it shorts then polarity problem.

Kevin

Sent from my iPhone



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#196377 May 23, 2014

Have you got a ground wire running from theboosters to the command station? One that is at least as heavy as your busswires? Dave BSt Louis



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#196378 May 24, 2014

Try using a meter that will read AC current as that is what is powering the tracks. Sounds like things are out of phase at the gaps. Switching the A and B rails should solve the problem.Jack



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#196411 May 26, 2014

Thanks for everyone's comments. It has turned out that the DCS200output is reversed from the boosters. Saturday I went to the club, switched theoutput feeds and everything ran smooth as can be.

We had looked at this before, but I guess we were thinking that you shouldbe able to tell if a command station and booster/boosters were in phase bylooking at the polarity of the rails. Such is obviously no the case, andled us to chasing our tails trying to figure it out. We now know to justcheck across the gap on the same rail to see if there is a short whenconnected. Looks like we overlooked the simple solution of using a lightacross the gap Would have told us immediately!!!

Jerry Michels







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#196422 May 26, 2014

Jerry,

The simplest solution is often the best. Position a UP5 panels onein each district and wire rail A- B to the back terminals. Thispowers the track power indicator, so in the future if you selectaddress OO and give it full throttle these indicator will eitherstay a matching color or separate to red & green indicating thetracks are out of phase again.

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Phil AgurSacramento Valley NtrakOn 5/26/2014 7:04 AM, asychis@...[Digitrax] wrote:

Thanks for everyone's comments. It has turnedout that the DCS200 output is reversed from theboosters. Saturday I went to the club, switched theoutput feeds and everything ran smooth as can be.

We had looked at this before, but I guess we werethinking that you should be able to tell if a commandstation and booster/boosters were in phase by looking atthe polarity of the rails. Such is obviously no thecase, and led us to chasing our tails trying to figureit out. We now know to just check across the gap on thesame rail to see if there is a short when connected.Looks like we overlooked the simple solution of using alight across the gap Would have told us immediately!!!

Jerry Michels

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Phil AgurSacramento Valley NtrakCrystal View Photo


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