I am very familiar with the MC2100 and how to use a PWM to contorll that board outside of a treadmill. The MC5100 is very similar with the same pin out and I have hooked up the PWM the same way but cant seam to get it to work. This older thread indicates a braking resistor is required to get the board working but does not say where to hook said resistor up. Any advice would be appreciated.