PLC Interference Mitigation 2026: Grounding & EMC | KOEED Blog
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PLC Interference Mitigation 2026: Grounding & EMC | KOEED Blog
Use shielded cable, single-point grounding, and EMC-rated cabinets as the baseline for any 2026 PLC install.
Detail
Separate signal, control, and power wiring by at least 200 mm and route them in dedicated trunking.
Add surge protection, ferrite cores, and RC snubbers on every inductive load driven by a PLC output.
Follow IEC 61000-4-2/4/5/6 test levels and validate with on-site EMC measurements after commissioning.
When retrofitting legacy PLCs, pair grounding upgrades with shielded spares sourced from KOEED to keep both safety and signal integrity intact.
This Engineering Notes article refreshes the 2024 piece on PLC interference with 2026 best practices: IEC-aligned EMC design, grounded cabinet layout, surge protection, shielded cabling, and how to source compliant spare parts through KOEED.
Interference still tops the list of field failures on PLC systems , especially on legacy chassis retrofitted with modern EtherNet/IP or Profinet drops. This 2026 refresh walks through the cabinet, cable, and grounding measures that we recommend on every
retrofit, and shows how KOEED sources the shielded spares that keep those measures in service.
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