IEC 61508-5:1998 PDF

Scope: 1.1 This section provides the following information: 　——Basic concepts of risk and the relationship between risk and safety integrity (see Appendix A); 　——Provides information that can remove E/E/PE safety-related systems, other technical safety-related systems and A set of methods for external risks to reduce the safety integrity level of a facility (see Appendix B, Appendix C, Appendix D and Appendix E). 1.2 The choice of method should depend on the application domain and specific environment. Appendix B, Appendix C, Appendix D and Appendix E list the qualitative and quantitative methods and have been simplified to illustrate the underlying principles. These appendices have been included to illustrate the general principles of a range of methods but do not provide explicit calculations. If you use the method mentioned in the appendix, you need to consult the relevant original materials. Note: For more information on the methods described in Appendix B, Appendix D and Appendix E, see [4], [2] and [3] in the references. For a description of additional methods, see [5] in the reference. 1.3 Figure 1 shows the overall framework of GB/T 20438, and also clarifies the role of this part in achieving the functional safety of E/E/PE safety-related systems.

IEC 61508-5:1998 history

2010 IEC 61508-5:2010 Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 5: Examples of methods for the determination of safety integrity levels
1970 IEC 61508-5:1998/COR1:1999 Corrigendum 1 - Functional safety of electrical/electronic/programmable electronic safety related systems - Part 5: Examples of methods for the determination of safety integrity levels
1998 IEC 61508-5:1998 Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 5: Examples of methods for the determination of safety integrity levels