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Comparing Certification under IEC 61508 1st Edition and 2nd Edition

An updated version of IEC 61508, Functional Safety of Electrical/Electronic and Programmable Electronic Systems was issued in September 2010.  This Second Edition is generally thought to clarify common interpretations of the first edition [N2] and add some refinements that had accumulated in the ten years since the first edition. The fundamental concepts and requirements did not change.

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