star wiring VS parallel bus

MTH DCS..

I have 5 home runs connecting both loops..a star pattern..but no sectional separation..

2 basic loops 110 feet each

if I isolate loops...can I power the other half of the track through the other input on the TIU with a Z1000?

will I have to to have a dual powered track, on a double pole double throw switch to change power sources so there is no cross over electric when the engines attempt to cross loops?

my goal is to run my passenger cars, and not over load on amps..

14 ga wire...considering doubling up on wires to increase size...will that affect DCS signal..which I believe is transmitted on the center rail only..

any help, reference material beside Barry's book, ( I have already and like)

thanks

1/18/1412:41 AM

❤️ 0

Original Post

Replies sorted oldest to newest

AcelaNYPOGR Forum Member

The TIU has four discrete inputs, so you can connect up to four different transformers, one per input. The train can cross from loop to loop without sparking as long as all transformers are in phase (this should not be an issue with modern transformers, but if you use postwar transformers with nonpolarized plugs you will have to ensure each unit is in phase with the other).

14 gauge wire is fine for bus lines, and I would recommend connecting additional feeder lines only to ensure you have no voltage drops (I'm guessing your feeders currently 22 feet or so apart [110 feet per loop / 5 home runs = 22 feet]). Since DCS is transmitted through the center rail, this will ensure you have good signal strength at all points from the TIU. Adding filters to both ends of each matched pair (explained in detail here) will also improve your signal strength.

-John

1/18/1411:51 AM

❤️ 0

1drummerOGR Forum Member

thanks...

1/19/143:12 AM

❤️ 0