How much latency is there in real-time AI data processing for industrial AI edge gateways using the EtherCAT protocol?

The industrial AI edge gateway integrates EtherCAT slaves to support AI data processing and bus synchronization. The typical latency is <50μs. To ensure that the EtherCAT physical layer does not introduce jitter under strong electromagnetic fields, a common-mode inductor CMZ2012A-900T is added to the PHY side, and a high-precision DC coupling is configured. At the same time, the EtherCAT slave controller ESC power supply uses an LC-filtered common-mode inductor CML3225A-101T and a PBZ1608E600Z0T ferrite bead. In addition, the MII/RMII signal lines have a series resistor of 22Ω to suppress overshoot. After testing, the EtherCAT cycle jitter is <15ns under a 10V/m radiated field, which meets the CIA402 drive requirements.