NBN EN 50129 : 2004

Foreword
1 Scope
2 Normative references
3 Definitions and abbreviations
  3.1 Definitions
  3.2 Abbreviations
4 Overall framework of this standard
5 Conditions for safety acceptance and approval
  5.1 The Safety Case
  5.2 Evidence of quality management
  5.3 Evidence of safety management
  5.4 Evidence of functional and technical safety
  5.5 Safety acceptance and approval
Annex A (normative) Safety Integrity Levels
      A.1 Introduction
      A.2 Safety requirements
      A.3 Safety integrity
      A.4 Allocation of safety integrity requirements
      A.5 Safety Integrity Levels
Annex B (normative) Detailed technical requirements
      B.1 Introduction
      B.2 Assurance of correct functional operation
      B.3 Effects of faults
      B.4 Operation with external influences
      B.5 Safety-related application conditions
      B.6 Safety Qualification Tests
Annex C (normative) Identification of hardware component failure
        modes
      C.1 Introduction
      C.2 General procedure
      C.3 Procedure for integrated circuits (including
          microprocessors)
      C.4 Procedure for components with inherent physical
          properties
      C.5 General notes concerning component failure modes
      C.6 Additional general notes, concerning components with
          inherent physical properties
      C.7 Specific notes concerning components with inherent
          physical properties
Annex D (informative) Supplementary technical information
      D.1 Introduction
      D.2 Achievement of physical internal independence
      D.3 Achievement of physical external independence
      D.4 Example of a method for single-fault analysis
      D.5 Example of a method for multiple-fault analysis
Annex E (informative) Techniques and measures for
        safety-related electronic systems for signaling for
        the avoidance of systematic faults and the control of
        random and systematic faults
Bibliography

Describes safety-related electronic systems (including sub-systems and equipment) for railway signalling applications.