GB/T 20438.6-2006
Functional safety of electrical/ electronic/ programmable electronic safetyrelated systems. Part 6: Guidelines on the application of GB/T 20438.2 and GB/T 20438.3 (English Version)

Standard No.

GB/T 20438.6-2006

Language

Chinese, Available in English version

Release Date

2006

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Status

Be replaced 2018-07

Replace By

GB/T 20438.6-2017

Latest

GB/T 20438.6-2017

Scope

1.1 This part includes the information and guidance of GB/T20438.2 and GB/T20438.3: ——Appendix A describes the requirements of GB/T20438.2 and GB/T20438.3, as well as the functional steps in the application process . - Appendix B lists how to calculate the probability of hardware failure. When reading, you should combine 7.4.3 and Appendix C of GB/T20438.2-2006 and Appendix D of this part. ——Appendix C gives a calculation example of the diagnostic coverage rate, which should be read in conjunction with Appendix C of GB/T20438.2-2006. - Appendix D describes the methodology for quantifying the hardware common cause failure rate. ——Appendix E gives an application example of the software safety integrity table specified in GB/T 20438.3-2006 Appendix A at safety integrity levels 2 and 3. 1.2 GB/T20438.1, GB/T20438.2, GB/T20438.3 and GB/T20438.4 are basic safety standards, although they are not applicable to simple E/E/PE safety-related systems (see GB/T20438. 3.4.4 of 4-2006), as the underlying safety standard, according to the principles contained in IEC Guide 104 and ISO/IEC Guide 51, which should be used by the relevant technical committees when developing standards. GB/T20438 can also be used independently. 1.3 When applicable, technical committees shall use the Basic Safety Standards when developing their standards. That is, the requirements, test methods or test conditions involved in this basic safety standard can only be applied if they are referenced or included in the development of the standard by the relevant technical committee. 1.4 Figure 1 shows the overall framework of GB/T 20438 and points out the role of this part in realizing the functional safety of E/E/PE safety-related systems.

GB/T 20438.6-2006 Referenced Document

• GB/T 20438.1 Functional safety of electrical/electronic/programmable electronic safety-related systems—Part 1: General requirements*， 2017-12-29 Update
• GB/T 20438.2 Functional safety of electrical/electronic/programmable electronic safety-related systems—Part 2:Requirements for electrical/electronic/programmable electronic safety-related systems*， 2017-12-29 Update
• GB/T 20438.3 Functional safety of electrical/electronic/programmable electronic safety-related systems Part 3: Software requirements*， 2018-07-01 Update
• GB/T 20438.4 Functional safety of electrical/electronic/programmable electronic safety-related systems—Part 4: Definitions and abbreviations*， 2017-12-29 Update
• GB/T 20438.5 Functional safety of electrical/electronic/programmable electronic safety-related systems—Part 5: Examples of methods for the determination of safety integrity levels*， 2017-12-29 Update
• GB/T 20438.7 Functional safety of electrical/electronic/programmable electronic safety-related systems—Part 7: Overview of techniques and measures*， 2017-12-29 Update

GB/T 20438.6-2006 history

• 2017 GB/T 20438.6-2017 Functional safety of electrical/electronic/programmable electronic safety-related systems—Part 6: Guidelines on the application of IEC 61508-2 and IEC 61508-3
• 2006 GB/T 20438.6-2006 Functional safety of electrical/ electronic/ programmable electronic safetyrelated systems. Part 6: Guidelines on the application of GB/T 20438.2 and GB/T 20438.3

GB/T 20438.6-2006 -All Parts