How to eliminate input-output interference in a motion controller MC?

Eliminating mutual interference between the input and output circuits of the motion controller MC requires effective isolation and filtering. The input and output circuits should be physically separated in the layout. Provide independent power supplies for the inputs and outputs, or isolate them using ferrite beads. In the signal path, the input channel should use a differential receiver or isolation amplifier with a high common-mode rejection ratio; the output channel should have a resistor or ferrite bead in series at the driver end to mitigate edge noise.

At the I/O connector, input and output signal pins should be separated by ground pins. Use separate shielded cables to connect the input and output devices. In software, the sampling times of high-frequency outputs and high-precision inputs can be staggered. Through testing, monitor the noise level of the input signal during output operation to locate coupling paths. If mutual interference is severe, consider placing the input and output functions on different boards and connecting them via a backplane, using physical distance and shielding for isolation.