IEC 61508-4-2010 PDF

Full title and description

Functional safety of electrical/electronic/programmable electronic safety-related systems — Part 4: Definitions and abbreviations. This part of IEC 61508 contains the definitions and explanation of terms used throughout the IEC 61508 series (Parts 1–7), grouped under general headings to aid consistent interpretation across the series.

Abstract

IEC 61508-4:2010 is the second edition of the definitions and abbreviations for the IEC 61508 functional safety family. It updates and replaces the 1998 edition, consolidating terminology used by the other parts of the series and serving as a basic safety publication to support the preparation and harmonization of related standards.

General information

• Status: Published (second edition; basic safety publication).
• Publication date: 30 April 2010.
• Publisher: International Electrotechnical Commission (IEC).
• ICS / categories: 25.040.40; 29.020.
• Edition / version: Edition 2.0 (2010).
• Number of pages: 68 pages.

Scope

Provides authoritative definitions and commonly used abbreviations for terms that appear in all parts of the IEC 61508 series. The document groups related definitions to promote consistent use of terms across functional-safety documents and to support technical committees preparing related standards. It does not extend the meaning of defined terms beyond their stated definitions.

Key topics and requirements

• Authoritative definitions of functional-safety terminology used across IEC 61508 Parts 1–7.
• Standardized abbreviations and acronyms for safety-related systems and lifecycle activities.
• Grouping and contextual presentation of terms to reduce ambiguity in interpretation of the series.
• Role as a basic safety publication intended to support development and harmonization of other standards.

Typical use and users

Used by standards committees, safety engineers, functional-safety assessors, system integrators, certification bodies and technical authors to ensure consistent terminology when applying, implementing, auditing or referencing the IEC 61508 series and derivative sector standards (for example in process, machinery, automotive or railway sectors).

Related standards

Part of the IEC 61508 family (Parts 1 through 7). Often cited alongside IEC 61508-1 (general requirements), IEC 61508-2 (hardware), IEC 61508-3 (software) and the other parts that address system requirements, supporting documentation and examples. IEC 61508-4:2010 has also been adopted into regional/national variants such as EN 61508-4:2010. Work to prepare an updated edition or IEC/EN alignment has been indicated in subsequent national bodies' records.

Keywords

functional safety; E/E/PE safety-related systems; definitions; abbreviations; IEC 61508; safety terminology; basic safety publication.

FAQ

Q: What is this standard?

A: IEC 61508-4:2010 is Part 4 of the IEC 61508 series and provides the definitions and abbreviations used by the rest of the series to ensure consistent terminology in functional-safety work.

Q: What does it cover?

A: It covers standardized definitions, explanatory notes where helpful, and the abbreviations and acronyms used across IEC 61508 Parts 1–7. It groups related terms but does not extend or change their normative meaning.

Q: Who typically uses it?

A: Standards developers, safety and reliability engineers, certification and conformity-assessment bodies, auditors, and technical authors who need consistent and authoritative functional-safety terminology.

Q: Is it current or superseded?

A: IEC 61508-4:2010 is the second edition (published 30 April 2010) and remains the authoritative definitions document for the 2010 edition of IEC 61508; national and regional adoptions (EN, national bodies) reflect that edition. Users should check national/regional catalogs or the IEC webstore for any later revisions or ongoing revision projects.

Q: Is it part of a series?

A: Yes — it is Part 4 of the IEC 61508 series (Parts 1–7) addressing functional safety for electrical/electronic/programmable electronic safety-related systems.

Q: What are the key keywords?

A: Functional safety, E/E/PE, safety-related systems, definitions, abbreviations, IEC 61508, safety terminology.