The PS314 power supply is only available with Zephyr Xtra Starter Sets. It is the only power supply that should be used with a Zephyr Starter set. It is not sold separately.
This document outlines the power requirements for Digitrax LocoNet accessories. To simplify wiring, Digitrax recommends providing individual power supplies for like accessories. For example a power supply or power buss which only powers the PM42s. A power supply or power buss used solely to power multiple DS64s. UR9x and UP5 panels can be daisy chained provided adequate current is provided to properly power all the panels. Through the use of individual power supplies, the chance of Ground Loops or sneak paths back to ground is minimized. Using individual power supplies will also make troubleshooting much easier. Many Digitrax LocoNet ...