I am no expert but I have two ZW-L's running the layout. It has 8 power districts so channels A through D of both transformers supply power to the track. It is set to Command in 4 channel mode. On the Cab 2 I select Track 1 through 8 to power up the track power districts. The maximum output voltage of each channel is as set by the individual handle positions. All power for accessories is supplied by separate power supplies. Since the Cab 2 knob controls the track voltage conventional engines can be operated with it.