Here is a look at the various turnout routes and how each section of rail should be powered:
The top "gauntlets" are powered just like a normal switched frog in a conventional turnout. It is just that the left and right turnouts are stacked atop each other. The center frog is powered from either the "left" or "right" routes; and dead otherwise.
Locking out the illegal route is all that is really left to do— and that can be either accomplished by clever software or hardware interlocking.
