- Connect the Z-750 to the aux power of the TIU. This powers the TIU all the time, even if you remove the voltage from Fixed #1.
- Connect the Z-4000 channels to each of the inputs to the fixed TIU channels.
- Connect the TIU Fixed channels to each of the track loops.
- Program the DCS system for fixed voltage on the variable outputs.
Now you're ready to operate. If you just run conventional with the transformer and DCS with the remote.
If you would like to run conventional from the remote, you can connect the transformer and track through the variable channels. In that case, you'd just run the Z-4000 handles up to 18 volts and use the remote to control the trains.
In this scenario, I also set the variable channels to fixed mode. This allows them to come up with full voltage upon power-up, but as soon as you address them with the TRACK key and vary the voltage, they automatically switch to variable mode.
