PD IEC/TR 61508-0:2005

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Functional safety
  3.1 What is functional safety?
  3.2 Safety functions and safety-related systems
  3.3 Example of functional safety
  3.4 Challenges in achieving functional safety
4 IEC 61508 - Functional safety of E/E/PE safety-related systems
  4.1 Objectives
  4.2 E/E/PE safety-related systems
  4.3 Technical approach
  4.4 Safety integrity levels
  4.5 Example of functional safety revisited
  4.6 Parts framework of IEC 61508
  4.7 IEC 61508 as a basis for other standards
  4.8 IEC 61508 as a stand-alone standard
  4.9 Further information
Annex A (informative) List of frequently asked questions from
                      IEC "functional safety" zone

Introduces the concept of functional safety and gives an overview of the IEC 61508 series.