Premier T-1 Reading Steam Locomotive
4
Ensuring Proper Power to Track Polariy
Figure 3: Proper 2-Rail polarity wiring and locomotive orientation
Changing Track Polarity Inside the Locomotive
Figure 4: Changing the polarity with the locomotive polarity switch
For 2-rail DCS operation, it is important that the polarity from the transformer to the
engine is properly configured. Correct polarity can be accomplished by ensuring that
the wiring from the TIU to the track and orientation of the locomotive when sitting on
the track follows the illustration in Figure 3.
To TIU Black Terminal
To TIU Red Terminal
DCS Polarity Switch
Failing to properly configure the
polarity for 2-rail operations will
result in the locomotive starting in
reverse instead of forward or not
receiving the DCS signal. Should
this occur, it is not necessary to
swap the wires from the
transformer to the track or reverse
the locomotive’s orientation on the
track itself. Instead, simply slide
the polarity switch on the bottom
of the Tender as seen in Figure 4.
