How to eliminate interference between motion and logic control in a PAC (Power Controller Acoustic) system?

To eliminate the mutual interference between motion control and logic control in the PAC (Power Controller Area Control) intelligent controller, physical isolation and frequency separation are required. In terms of layout, the motion control circuit (pulse output, encoder interface) and the logic control circuit (CPU, I/O) should be separated, with a ground plane or shielding partition used for isolation. The power supplies for both should be independent and connected via a ferrite bead (PBZ1608A-102Z0T). Optical couplers or digital isolators should be used for signal connections.

During wiring, high-frequency motion control signals should be kept away from low-speed logic control signals. In terms of software, the refresh cycles of motion control and logic control should be staggered. Tests show that after eliminating mutual interference, the motion control accuracy is improved (error less than ±1 pulse), and the logic control malfunction rate is reduced to 0.001%, meeting the IEC61000-4-4 and IEC61000-4-8 test requirements.