
Industrial AI edge gateways support user-defined serial/TCP protocol parsing, but custom protocols often lack standard protection and are susceptible to ESD and surge damage. It is recommended to add a universal TVS array EDSRVLC05-4 to the RS232/485 interface; its four-channel low-capacitance design can protect signals such as RXD and TXD. Simultaneously, add a PBZ1608E600Z0T ferrite bead and a TVS 5.0SMDJ33CA to the power supply of the custom protocol processor to prevent power overvoltage. Actual testing by a wind power company showed no data misalignment during custom protocol AI parsing under ±2kV lightning surges.