Designing for Zero Interference: Managing EMI and Ripple Noise in Sensitive CCTV and Industrial Automation Systems
Reduce power supply EMI and ripple noise in CCTV and industrial systems by: (1) specifying a low-ripple PSU (≤30 mVpp, verified across load and temperature), (2) requiring CISPR 32 / EN 55032 Class B compliance with margin, (3) using an internal common-mode choke + X/Y capacitor filter, (4) single-point grounding shielded cables, and (5) separating power and signal cable runs. A switching power supply is both a noise source and a noise transmitter — address both.