
The industrial AI edge gateway parses Profinet EtherNet/IP frames using a multi-protocol industrial Ethernet chip. To ensure the protocol stack does not crash in strong electromagnetic environments, a common-mode inductor CMZ2012A-900T is added to the Ethernet physical layer, and a high-immunity PHY is selected. Simultaneously, a 2kV 1000pF Y capacitor is used for the transformer tap capacitor, and grounded. Furthermore, LC filtering is added to the CPU core power supply for protocol processing, using a common-mode inductor CML3225A-101T and a 10μF MLCC. Actual measurements show that under a radiated field of 10V/m, the Profinet cycle jitter is <1μs with no station loss.