What is BS EN 61508-5 - Safety integrity levels of programmable electronic about?
BS EN 61508-5 is the fifth part of the BS EN 61508 multi-series. BS EN 61508-5 is a European standard that sets out a generic approach for all safety lifecycle activities for systems comprised of electrical and/or electronic and/or programmable electronic (E/E/PE) elements that are used to perform safety functions.
BS EN 61508-5 provides information on:
The underlying concepts of risk and the relationship of risk to safety integrity
A number of methods that will enable the safety integrity levels for the E/E/PE safety related systems to be determined
The method selected will depend upon the application sector and the specific circumstances
under consideration. Annexes C, D, E, F and G illustrate quantitative and qualitative approaches and have been simplified in order to illustrate the underlying principles. These annexes have been included to illustrate the general principles of a number of methods but do not provide a definitive account. Those intending to apply the methods indicated in these annexes should consult the source material referenced.
Note: For more information on the approaches illustrated in Annexes B, and E, see references [5] and [8] in the Bibliography. See also reference [6] in the Bibliography for a description of an additional approach.
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