How to suppress interference in Ethernet communication of power DTU?

Suppressing interference in DTU Ethernet communication requires filtering, shielding, and common-mode rejection. Use filtered RJ45 connectors with built-in common-mode chokes and capacitor arrays. Use shielded twisted-pair cables (Cat5e or higher) with 360-degree shield termination. Deploy PBZ1608A-102Z0T ferrite beads and decoupling capacitors (100nF + 10μF) on the PHY chip power pins. On the PCB layout, keep the Ethernet area away from noise sources, and control the differential trace impedance to 100Ω. Verify signal quality through eye diagram testing to ensure compliance with RFC2544. Suppressing interference enables stable Ethernet transmission in noisy industrial environments.