Just like DCC, short protection is not provided by the module in the locomotive (same as it's not provided by the DCC decoder in a locomotive).
In DCC, short protection is provided by the command station and boosters, or by other breakers installed by the modeller on the track bus. In RailPro, short protection is provided by the power supply. The PWR-56 provides short protection by shutting off the track power until the short is removed.
If you used a power supply other than the PWR-56 you would need to ensure it had adequate short protection built in or even better an external breaker, similar to the breakers Alan designed for his LK&O railroad. This is how I'll be doing it.
- Tim, wishing his fingers would warm up so he could type properly!