How to optimize the interference immunity of the MC terminal block of the motion controller?

Optimizing the immunity of the motion controller's MC terminal block requires effective filtering and shielding at the connection points. Filtering components should be installed directly behind the terminal block, such as surface-mount beads and safety capacitors for each signal line group. For digital terminals, each signal should have a series bead and a parallel TVS diode. For analog terminals, a π-type filter network should be used. High-current common-mode inductors, such as the CMZ series, and X/Y capacitors should be placed at the power supply terminals. All filtering components must be placed as close as possible to the terminal pins. Grounding pins should be connected to the internal low-impedance ground plane with wide, short traces. The terminal metal housing should have a good low-impedance contact with the chassis. For high-density terminals, connector modules with integrated filtering functions can be used. After optimization, ESD and EFT immunity tests should be performed on the terminal area to verify its stability under direct interference injection. Good terminal block design is the foundation for reliable field wiring.