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4 replies

Changes to rev L TIU-2 Rail

H Hudson5432OGR Forum Member

I am considering buying a new TIU Rev L. I operate a 2 rail DC powered layout that currently uses DCS and a TIU for two of my four tracks. I read that the "common" of the new TIU is "no longer connected internally". Why was this change made? I assume as a two rail operator this has no effect for me. Comments please!

I also read that for  all TIU versions, the Variable channels can be converted to Fixed but will not transmit DC, and will only transmit AC power. Is this correct, and why were these channels designed this way? It would be a lot easier for me to reconfigure the Variable channels than to buy a second TIU.....and potentially have to run a Super mode, with all that entails.....

I am powering the TIU Fixed channels with DC power, since I have a number of  brass locomotives that require 12 VDC.  If the Variable channels will not pass DC power, can I power the two Variable channels with AC power, and run a mix of DC and AC power into the TIU??? My reason for this would be to run a mix of brass DC and MTH engines on the same layout, although on different tracks. (The layout's four mainline tracks are blocked and isolated electrically from each other.)

Is there a software package/revision available that will permit the Variable channels to be reconfigured to pass DC power?

(I admit that this is an unusual situation...!)

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H Hudson5432OGR Forum Member

Barry,

Thanks!

Now I have two related questions...

If I install a second TIU on a layout where each track is isolated from the adjoining track....and the layout has four mainline tracks

Do the two TIU's have to be run in Super TIU mode?

Does each TIU have to have the same software revision installed?

Each TIU would have a separate power supply, and each TIU (and its power supply) would power two tracks. I think, but am not sure, that this is equivalent to having two separate layouts in the same room. (I actually have a third DCS layout, a three rail, in the room, and I had to re identify that TIU to avoid engines on the 3 rail layout starting up when I operated the two rail layout.)

 

 

Barry BroskowitzBarry BroskowitzOGR Forum Member MEMORIALIZED MEMBER

If I install a second TIU on a layout where each track is isolated from the adjoining track....and the layout has four mainline tracks...Do the two TIU's have to be run in Super TIU mode?

Only if you plan to operate any DCS engines on tracks connected to both TIUs.

Does each TIU have to have the same software revision installed?

Yes, they should, and the same software in all of the remotes, as well.

This and a whole lot more is all in MTH’s “The DCS Companion 3rd Edition", available for purchase  from many fine OGR advertisers and forum sponsors, or as an eBook or a printed book at MTH's web store!

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