Safety PLC Selection Criteria 2026: Five Spec Gates That Decide the Build
Safety PLC selection turns on five spec gates: SIL target (SIL 2/3 per IEC 61508), response time, I/O mix, bus protocol compatibility and certifications (TÜV, ATEX 2014/34/EU, IEC 61511). Mismatches drive rework, audits, and re-spec costs.
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