There are modules available from Digitrax as well as a couple other distributors for short circuit and reverse loop control. The digitrax unit is a DPM42. Each DPM-42 has 4 sections which can be configured as short circuit protection for 4 power districts, or set up to do automatic reversing on 4 reverse loops or any combination thereof. I am using 2 of the modules, configured for 5 power district s/c protection, 1 reversing section for my turntable and 1 additional s/c protection for the turntable.