How to achieve RS radiated immunity of motion controller MC?

To ensure the motion controller (MC) meets radiated interference immunity standards, its resistance to spatial electromagnetic fields needs to be enhanced. First, ensure the housing is a complete metal shield, using conductive gaskets at joints and waveguide plates for ventilation holes. All incoming and outgoing cables are primary coupling paths and must use shielded cables with the shielding layer terminated 360 degrees to the housing at the entry point. For cables that cannot be shielded, install common-mode chokes and filter capacitors at the ports. On the PCB, critical circuit areas can use local shielding covers.

Optimize the layout, reduce the area of high-speed signal loops, and ground the clock line. Select isolation devices that are insensitive to radiated interference. Add a watchdog timer and anomaly recovery mechanisms to the software. During testing, conduct tests in an anechoic chamber according to IEC 61000-4-3, using a field strength probe to monitor the field strength at key internal points, identify weak points, and strengthen shielding or filtering accordingly. Multiple iterations are usually required to achieve higher field strength levels, such as 10V/m or higher.