How to handle the shielding of EPS control cables?

The shielding treatment for EPS control cables (such as sensor signal lines, I/O lines, and low-speed communication lines) needs to be determined based on the signal type and interference environment. For analog and low-frequency digital signals, if the main purpose is to suppress low-frequency magnetic field interference, single-end grounding (usually grounded at the receiving end) can be used to avoid ground loops. If the environment has severe high-frequency noise, double-end grounding is still required. For analog signal lines susceptible to interference, a twisted-pair plus overall shielding structure is recommended, with the shielding layer grounded at both ends. The processing process also requires 360-degree overlap. Before entering the control board, the signal line should be filtered (such as RC filtering, common-mode choke) before entering the connector. For long-distance transmission, signal isolators (such as isolation operational amplifiers, optocouplers) can be used at both ends to completely solve the ground loop and common-mode interference problems. In this case, the shielding layer can be grounded on the isolator device side. The key is to provide a clear and clean reference ground for the shielding layer and the signal.