@Jack B The Uncoupler will work on 14VAC from the Z-1000 accessory output, but there is an increased risk of the electromagnetic coil in the uncoupler melting the track housing. The higher voltage will decrease the time the uncoupler can be activated without overheating. Also the control buttons that come with the uncouplers are notorious for sticking in the on position.
Here's a pic from another thread:
Many people opt to replace the stock control with an aftermarket momentary push button rated for 5 Amps. Another small variable output AC transformer set to 10-12 volts would also be a good idea .
If you want to take the protection another step further, you could install a PTC resettable fuse in line with the uncoupling coil. This one is what's recommended: Bourns MF-R050 if interested, I can post a picture showing the installation.
