@Danal Thanks for the advice, I have just found some more information directly from Mafell which may help!
- if not connected, the machine operates manually via the potentiometer wheel
- for connecting to external speed control, please use the M8/4-pin interface
Upv = basic power supply (8-56V)
Us = speed control (0-10V)
Uo = no entry (this is a signal from the motor to the router on overload = same information as LED)
GND = reference to Upv (same as + and -)