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How to suppress interference from long cables in intelligent low-voltage monitoring units?

Time：2026-02-05 Views：4次

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For interference suppression of long cables (>10m), transmission line effects must be considered. Shielded twisted-pair cable with characteristic impedance matching is used.

Termination matching: 120Ω resistor in parallel.

Repeaters: Add signal repeaters every 500 meters.

Common-mode filtering: Add CMZ3225A-510T common-mode inductors at both ends of the cable.

Protection: Install ESDSM712 protection at both ends.

Cabling: Keep away from interference sources.

Through suppression, the bit error rate of long cable transmission is less than 10^-6.

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