This may help
The following describes each pin:
5V positive, 5V negative: Provides a DC 5V power supply, which can be used to power the handwheel
X-axis, Y-axis, Z-axis, A-axis: Connect to the axis switch on the handwheel, use
To select the axis to be jogged
A and B: encoder outputs A and B connected to the handwheel X10: Increase the handwheel speed by 10 times
X100: Increase the handwheel speed by 100 times
The handwheel interface is compatible with the Weihong system handwheel.