How do the concentrator and master station communicate and coordinate (EMC)?

When the concentrator communicates with the main station (monitoring center), EMC design must be coordinated at the system level to prevent the interface from becoming a point of entry for interference. Key points of coordination include: a unified grounding strategy, agreeing to use the concentrator's chassis ground (PE) as the communication reference ground; consistent interface standards, using isolated interfaces and agreeing on protection levels (e.g., 4kV surge voltage); standardized cable specifications, specifying the use of shielded twisted-pair cables, with the shield connected to chassis ground at both ends (or one end); standard protection and filtering design for the interface circuit at the concentrator end; and corresponding protection measures at the main station end. Both parties can agree to add redundancy checks and retransmission mechanisms to the communication protocol. During system installation, ensure good equipotential bonding between the concentrator and the main station equipment. Through coordinated design, the entire communication link can be treated as a whole to resist interference, avoiding communication failures caused by mismatched protection on one side.