@goldnut posted:Lou, do you mean the other output?
Yes. Power the TIU through Fixed 1 or the AUX input. Power your track through another channel (Fixed 2 for example) and see if everything works.
Note: If you connect power into Fixed 1 Input to power the TIU and not the AUX power port you will need to power another channel (I.E. Fixed 2) through the input (Fixed 2 Input) and then run the wires from Fixed 2 Output out to you test track.
All this is in the DCS instruction manual if you read it .