What are some low-cost EMC optimization solutions for power measurement switches (PMS)?

While ensuring the basic EMC performance of the PMS, low-cost EMC optimization can be achieved through optimized design and selective component use. Solutions include: prioritizing optimized PCB layout and grounding—a zero-cost but highly effective measure, such as ensuring a complete ground plane, keeping sensitive circuits away from noise sources, and shortening critical traces. Selectively using filtering components: adding ferrite beads (PBZ series) and capacitors locally near noise sources (e.g., switching power supply output) and sensitive circuit entry points (e.g., ADC input), instead of laying them across the entire circuit.

Using connectors with integrated filtering and protection functions (e.g., filtered RJ45 connectors) may be more economical than separate designs. Implementing digital filtering and fault-tolerant algorithms in software to replace some hardware filtering. Selecting cost-effective domestic EMC components, such as the CMZ, CML, and PBZ series from Yinte Electronics. Conducting thorough pre-testing to accurately locate out-of-specification points and avoid blindly adding components. Replacing expensive shielding materials with structural design (e.g., utilizing the chassis itself for shielding). These measures can ensure the PMS meets mainstream EMC standards while controlling costs.