BS EN 61508-6:2010 Functional safety of electrical/electronic/ programmable electronic safety related systems. Guidelines on the application of IEC 61508-2 and IEC 61508-3
BS EN 61508-6 contains information and guidelines on BS EN 61508-2 and BS EN 61508-3.
Annex A gives a brief overview of the requirements of BS EN 61508-2 and BS EN 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 BS EN 61508-2.
Annex C gives a worked example of calculateing diagnostic coverage and should be read in conjunction with BS EN 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 in BS EN 61508-3 for safety integrity levels 2 and 3.
The BS EN 61508 series consists of 7 parts that cover the functional safety of E/E/PE safety systems: