IEC 61508-4:2026 FDIS adds AI, cybersecurity, and diagnostic definitions
Original title: Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 4: Definitions and abbreviations
IEC has released the Final Draft International Standard (FDIS) of IEC 61508-4:2026, the definitions and abbreviations part of the functional safety series, available for purchase and comment until 2026-11-13. This third edition technically revises the 2010 second edition by introducing or modifying a significant set of definitions. Compliance teams implementing E/E/PE safety-related systems will need to review updated terminology — particularly around AI-related software technology classes, tool qualification, and diagnostic functions — as these definitions flow into conformance assessments across the entire IEC 61508 series and dependent sector standards.
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