Re: SAMRA Show Jan. 27th-28th

["Ira Schneider" <ira_schneider@iname.com>]

Scott,

The power currently goes from the transformer to the TPC, then the TIU, then to the track.

Putting a switch between the transformer and the TPC/TIU only cuts out the TPC.

In order to select the TPC vs TIU to power the track, the switch would have to go between
the track input line and the output of the TPC and the TIU.  This would send the DCS
signal from the TIU through the switch to the track, possibly degrading the signal.

I am particularly concerned about putting a switch between the TIU and the track because,
as you may already know, the MTH DCS system cannot detect a Protosound 2.0 engine
on any of the sidings.  I suspect the problem is either the toggle switches in the siding
control box or the relay (used to interrupt power to the sidings when the DIR button is pressed).
They both intercept the power flow between the TIU and the sidings.


Ira