I have an application where I have two VFD's with two drives. The application is a incline chain rail system called a hog elevator. We are trying to find some form of master switch module that will allow us to run either motor or elevator from either VFD so that we may service the VFD. The drive is a AB 1336f with an L4 module rated for 10 hp at 600 volts. we use 3 phase, 120 volt and 24 volt on the overall circuitry. the controls are mainly 24 volt however the drive control voltages are primarily 120 volts. On the vfd, we have a preset speed selector switch, a speed pot. start stop commands. jam detect the fault relay to indicate a drive fault. and an auto manual switch. as well as a limit switch for rail full conditions. before and after each VFD we have line reactors on the 3 phase 600 volt power. What I am hoping to find is some form of selector master switching modules with input indicator leds. Any suggestions or links would be greatly appreciated.