How to optimize the wiring in the concentrator terminal area?

The terminal area (power, communication, and acquisition terminals) of the concentrator is the main channel for external interference intrusion and equipment noise radiation, making wiring optimization crucial. The terminal area should be clearly separated from other circuit areas by a protective barrier, typically marked on the PCB with slots or white paint. All signal lines entering from the terminals must immediately pass through filtering and protection devices; for example, power lines should pass through a common-mode inductor CMZ1211-501T and an X capacitor, while communication lines should pass through an ESD protection transistor ESDSM712 and a common-mode inductor CML3225A-510T before entering the internal circuitry. Filtering devices should be placed close to the terminals. The ground plane beneath the terminals should remain intact to provide low-impedance grounding for the filtering capacitors. If the terminals have a metal casing and are connected to the chassis, a ring of grounding vias should be installed around their mounting holes. For highly sensitive acquisition terminals, partial shielding can be used. Cable entry directions should be fixed to avoid parallel and close routing of input and output cables within the terminal area.