How to reduce crosstalk in the backplane wiring of motion controller MC

Reducing wiring crosstalk on the motion controller (MC) backplane requires attention to spacing, isolation, and termination. Increase the spacing between adjacent signal lines, especially high-speed lines between different slots. Insert ground wires or ground pins between sensitive signal lines. Use stripline structures for long parallel traces on the backplane, utilizing upper and lower ground planes for isolation. Control the characteristic impedance of signal lines and ensure their return paths are continuous, avoiding ground plane segmentation.

For differential pairs, maintain strict equal length and spacing. Add series resistors at the drive end to mitigate edge interference. For the receiver end, perform appropriate termination matching. Use simulation software to extract parasitic parameters of the backplane, predict crosstalk levels, and adjust trace width, spacing, and stack-up accordingly. When selecting connectors, prioritize models with abundant ground pins and staggered signal pin distribution. Measure actual crosstalk values through backplane interconnect testing to verify the design effectiveness. Good backplane routing is the foundation for the stable operation of multi-module systems.