
The industrial AI edge gateway supports MQTT/HTTP communication with the cloud to receive model downloads. To ensure that model file transmission is not damaged by network port surges, a common-mode inductor CMZ2012A-900T and a TVS ESDLC3V3D3B are added between the Ethernet PHY and RJ45. Simultaneously, two-stage surge protection is added to the power input port: a 14D391K varistor and a 5.0SMDJ33CA TVS. A CML4532A-101T common-mode inductor is connected in series at the DC-DC input. Furthermore, a PBZ1608E600Z0T ferrite bead is connected in series to power the 4G/5G module to suppress radio frequency interference. Actual testing shows a 99.99% success rate for 10MB model downloads with no interruption during ±2kV surges.