How to achieve RS (radiated interference immunity) standards for concentrators?

The concentrator must meet the IEC 61000-4-3 Radiated Immunity (RS) requirements, i.e., operate normally in the 80MHz-1GHz frequency band at a field strength of 3V/m or 10V/m. Compliance depends on good shielding, filtering, and circuit design. Chassis shielding is crucial: use a conductive, continuous metal chassis with gap lengths less than λ/20, and use conductive pads where necessary. Panel openings should be shielded with conductive glass or metal mesh. All incoming and outgoing cables must be filtered: power lines should pass through feedthrough capacitors or filtered connectors; signal lines should pass through filtered interface circuits. The internal PCB layout should avoid long traces acting as antennas; sensitive circuits can be covered with local shielding covers. For critical signal lines such as reset and interrupt signals, a PBZ1005B-501Z0T ferrite bead should be connected in series or a small capacitor in parallel. On the software side, a watchdog timer and status self-test should be added. During pre-testing, weak frequency points should be identified and specifically reinforced. Through design, the concentrator can stably pass the 10V/m RS test.