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Go Deadrail with RailPro

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G8B4Life:

--- Quote ---Well, it has been a lot more than a couple of months but the system is finally installed in the Big Boy.
--- End quote ---

Now I am perplexed as to how this runs. I ask as your schematic seems to be missing a connection that provides power to the module and is also feeding the battery into the common, which is in effect an output, which may or may not be a good thing to do.

There is a thread on sizing pictures you can find here http://rpug.pdc.ca/index.php?topic=11.0. See the sample code bit in the first post.

- Tim

melarson:

--- Quote from: G8B4Life on August 13, 2016, 10:54:40 AM ---Now I am perplexed as to how this runs. I ask as your schematic seems to be missing a connection that provides power to the module and is also feeding the battery into the common, which is in effect an output, which may or may not be a good thing to do.

--- End quote ---

Yes, under normal input conditions (red and black wires connected to the rails) the blue common would be considered an "output."  The blue common connection is effectively just the positive output connection of the bridge rectifier.  However, in the absence of non-polarized input power we can safely connect polarized power to the blue common (V+) and the new negative lead (V-) of the LM-3, bypassing the module's rectifier and supplying rectified DC directly to the module.  This is true as well of DCC decoders that have a negative lead, and was added to allow the connection of keep-alives.  It is not possible to run the LM-1 or LM-2 in this manner as they lack this negative lead (though Bill and others have posted in another thread how to add keep-alives to these other LM's).

I have to say, the engine ran flawlessly.  Not a flicker or stutter, no dead spots what-so-ever.  All of that was expected of course, but considering our club's lack of clean track and wired frogs it was truly refreshing to see.  I did take some pictures and videos but don't have time now to post them, plus the videos didn't come out too well.  I will attempt to make better ones here at home and post them tomorrow.

melarson:
So here is a short video of the engine running at the club.  Still working on getting good video of the engine under obvious battery power (my installer has a great video of it running on his workbench surface, not on track, but haven't been able to get it to me as yet).

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