DCS QUESTION

 I powered up loop two to 18 volts on the z4000 the outside loop also powered up to 18 volts.  Shouldnt the loops be independent?

Yes, the are. If powering up one loop also powers up the other, then most likely you have an unintended connection between the center rails on the two loops.

  Does the TIU automatically cross them and power them both?

No, it should not.

No Its sounds like something is crossed. Each loop is controlled by one side of the Z4000k  correct?. Track one should go to fixed input one and track 2 should run to fixed input 2.  retrace the wires.

Thanks and I have ordered your book.

In that case, thank you!  

MR UP,

   You definitely have some wiring set up incorrectly, and as I keep advising all new DCS runners, purchase Barry's great instructional book and the OGR Video Guide to DCS also, before constructing a DCS/Legacy layout, it saves a lot of hands on learning and frustration.  I only wish Barry had written his book when the DCS 1st hit the market,

I know my long distance telephone bills between Barry's place and mine were extensive back in that era. He helped me get started when there was no book available, IMO he deserves every dime he makes from his technical writing.  I owe him big time for helping me get started with my early DCS layouts, got to tell ya it was a real trip with the first TIU & AIU, I maybe a little bit of a made man, because of the early equipment.

Further when Marty F came up with the magic light technology, it made everything a lot less frustrating with the initial DCS equipment, these men really know what they are doing, when they give advise use it, I have never known them to be incorrect.

PCRR/Dave

Yep, I had a wire from the outside loop crossed with the inside loop.  Anyway, get this...I ordered the book on Saturday from Amazon, It arrived on my door step Monday morning!!!  There is no doubt about it, the DCS Companion book is the ultimate resource for DCS.