EN 61508-6:2010

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Definitions and abbreviations
Annex A (informative) - Application of IEC 61508-2 and of
        IEC 61508-3
Annex B (informative) - Example of technique for evaluating
        probabilities of hardware failure
Annex C (informative) - Calculation of diagnostic coverage
        and safe failure fraction - worked example
Annex D (informative) - A methodology for quantifying the
        effect of hardware-related common cause failures in
        E/E/PE systems
Annex E (informative) - Example applications of software
        safety integrity tables of IEC 61508-3
Bibliography
Annex ZA (normative) - Normative references to international
         publications with their corresponding European
         publications

IEC 61508-6:2010 contains information and guidelines on IEC 61508-2 and IEC 61508 3. Annex A gives a brief overview of the requirements of IEC 61508-2 and IEC 61508-3 and sets out the functional steps in their application. Annex B gives an example technique for calculating the probabilities of hardware failure and should be read in conjunction with 7.4.3 and Annex C of IEC 61508-2 and Annex D. Annex C gives a worked example of calculating diagnostic coverage and should be read in conjunction with Annex C of IEC 61508-2. Annex D gives a methodology for quantifying the effect of hardware-related common cause failures on the probability of failure. Annex E gives worked examples of the application of the software safety integrity tables specified in Annex A of IEC 61508-3 for safety integrity levels 2 and 3. This second edition cancels and replaces the first edition published in 1998. This edition constitutes a technical revision. It has been subject to a thorough review and incorporates many comments received at the various revision stages. NEW! Also available: IEC Standards+ 61508:2010, containing all parts, together with a commented Redline version. Changes made in this 2nd edition are highlighted and commented by a leading world expert.