National Foreword
European foreword
Foreword
Introduction
1 Scope
2 Normative references
3 Terms definitions symbols and abbreviated terms
4 Design considerations
5 Safety functions
6 Categories and their relation to MTTFD of each channel
DC[avg] and CCF
7 Fault consideration fault exclusion
8 Validation
9 Maintenance
10 Technical documentation
11 Information for use
Annex A (informative) - Determination of required
performance level (PL[r])
Annex B (informative) - Block method and safety-related
block diagram
Annex C (informative) - Calculating or evaluating MTTF[D]
values for single components
Annex D (informative) - Simplified method for estimating
MTTF[D] for each channel
Annex E (informative) - Estimates for diagnostic coverage
(DC) for functions and modules
Annex F (informative) - Estimates for common cause
failure (CCF)
Annex G (informative) - Systematic failure
Annex H (informative) - Example of combination of several
safety-related parts of the control system
Annex I (informative) - Examples
Annex J (informative) - Software
Annex K (informative) - Numerical representation of Figure 5
Bibliography
Annex ZA (informative) - Relationship between this
European Standard and the Essential
Requirements of EU Directive 2006/42/EC