Printed circuit board configuration having reduced EMC/EMI interference in electromechanical relay circuits

摘要

Isolated planar conductive structures on separated layers of a PCB provide the normally-open, common, and normally-closed components of an electromechanical relay circuit to minimize inductive area. The isolated planar configuration reduces coupling of relay contact-noise currents to nearby sensitive circuits, and minimizes coupling EMI energy from nearby logic or microprocessor circuits to the relay contact circuits.