Newbie TIU Question

Carl,

If I connect a TMCC PowerHouse brick to TIU fixed input 1, will the TIU still provide variable output on variable output 1 or 2 in order to control conventional engines?  And along the same vein, allow me to apply full voltage for command locos?

No, you must have a power source as input to each TIU channel that you wish to use. You can, however, split one power source as input to multiple TIU channels.

does MTH assume that you'll use a variable transformer to vary the voltage for conventional

No, the assumption is that each variable channel has a 22 volt AC input that is then varied within the TIU using the TIU Tracks from the remote's TR screen.

noted that they say DC input power cannot be varied at the output

I don't understand what that means. However, while AC power can be input to any TIU channel, DC voltage can only be used as input to the TIU's Fixed channels.

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

Thanks, Barry; I think that's clear.  I'll probably pick up a copy of the book at York in a few weeks.