How are reverse loops and Ys wired?
Reversing loops can be done in the classical way for command control. The polarity is correct when the train enters the loop. While in the loop the polarity of the rails is reversed. Note that unlike conventional systems, it is possible to reverse the polarity of the reverse loop itself while the train is running in it – the locomotive will keep moving in the same direction. There is another technique that utilizes the ability of the digital decoder to run on traditional power. Use a separate analog power supply to power the loop. When you enter the loop it is a normal digital to analog transition and when you exit the loop it is a normal analog to digital conversion. When transitioning between digital and analog power a digital circuit breaker (see following question) or a choke should be used on the analog power supply to prevent the power supplies from combining.
