IEC 61508-1:2010 covers those aspects to be considered when electrical/electronic/programmable electronic (E/E/PE) systems are used to carry out safety functions. A major objective of this standard is to facilitate the development of product and application sector international standards by the technical committees responsible for the product or application sector. This will allow all the relevant factors, associated with the product or application, to be fully taken into account and thereby meet the specific needs of users of the product and the application sector. A second objective of this standard is to enable the development of E/E/PE safety-related systems where product or application sector international standards do not exist. This second edition cancels and replaces the first edition published in 1998. This edition constitutes a technical revision. It has been subject to a thorough review and incorporates many comments received at the various revision stages. It has the status of a basic safety publication according to IEC Guide 104. NEW! Also available: /2, containing all parts, together with a commented Redline version. Changes made in this 2nd edition are highlighted and commented by a leading world expert. This publication is of high relevance for Smart Grid.

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7	Functional safety of electrical/electronic/programmable electronic safety-related systems – Sécurité fonctionnelle des systèmes électriques/électroniques/électroniques programmables relatifs à la sécurité – Partie 1: PrescriptionsExigences générales (CEI 61508-1:2010) Central Secretariat: rue de Stassart 35Management Centre: Avenue Marnix 17, B – 10500 Brussels
9	EN 61508−1:2001 Endorsement notice
10	Annex ZA (normative)
16	INTERNATIONAL ELECTROTECHNICAL COMMISSION
18	INTRODUCTION
21	FUNCTIONAL SAFETY OF ELECTRICAL/ELECTRONIC/PROGRAMMABLE ELECTRONIC SAFETY-RELATED SYSTEMS – 1 Scope
24	Figure 1 – Overall framework of this standardthe IEC 61508 series
25	2 Normative references 3 Definitions and abbreviations
26	4 Conformance to this standard 5 Documentation 5.1 Objectives 5.2 Requirements
28	6 Management of functional safety 6.1 Objectives 6.2 Requirements
32	7 Overall safety lifecycle requirements 7.1 General 7.1.1 Introduction
34	Figure 2 – Overall safety lifecycle
35	Figure 3 – E/E/PES system safety lifecycle (in realisation phase)
36	Figure 4 – Software safety lifecycle (in realisation phase)
37	Figure 5 – Relationship of overall safety lifecycle to the E/E/PESPE system and software safety lifecycles 7.1.2 Objectives and requirements – general
38	Table 1 – Overall safety lifecycle – overview
43	7.1.4 Requirements 7.2 Concept 7.2.1 Objective
44	7.2.2 Requirements 7.3 Overall scope definition 7.3.1 Objectives 7.3.2 Requirements 7.4 Hazard and risk analysis
45	7.4.1 Objectives 7.4.2 Requirements
46	7.5 Overall safety requirements 7.5.1 Objective
47	7.5.2 Requirements
48	7.6 Safety Overall safety requirements allocation
49	7.6.1 Objectives 7.6.2 Requirements
51	Figure 6 – Allocation of overall safety requirements to the E/E/PE safety-related systems and other technology safety-related systems and external risk reduction facilitiesmeasures
52	Table 2 – Safety integrity levels – target failure measures for a safety function operating in low demand mode of operation
55	7.7 Overall operation and maintenance planning 7.7.1 Objective 7.7.2 Requirements
56	7.8 Overall safety validation planning 7.8.1 Objective 7.8.2 Requirements
57	7.9 Overall installation and commissioning planning 7.9.1 Objectives 7.9.2 Requirements
58	7.10 Realisation: E/E/PESPE system safety requirements specification 7.10.1 Objective 7.10.2 Requirements
60	7.11 E/E/PE safety-related systems – realisation 7.1011.1 Objective 7.1011.2 Requirements 7.12 Realisation: external risk reduction facilitiesOther risk reduction measures – specification and realisation 7.12.1 Objective 7.1112.2 Requirements
61	7.13 Overall installation and commissioning 7.13.1 Objectives 7.13.2 Requirements 7.14 Overall safety validation 7.14.1 Objective 7.14.2 Requirements
62	7.15 Overall operation, maintenance and repair 7.15.1 Objective 7.15.2 Requirements
64	Figure 7 – Example of operations and maintenance activities model
65	Figure 8 – Example of operation and maintenance management model
66	7.16 Overall modification and retrofit 7.16.1 Objective 7.16.2 Requirements
68	Figure 9 – Example of modification procedure model 7.17 Decommissioning or disposal 7.17.1 Objective 7.17.2 Requirements
69	7.18 Verification 7.18.1 Objective 7.18.2 Requirements
70	8 Functional safety assessment 8.1 Objective 8.2 Requirements
73	Table 4 – Minimum levels of independence of those carrying out functional safety assessment (overall safety lifecycle phases 1 to 8 and 12 to 16 inclusive (see fFigure 2))
75	– document kind;
76	A.2 Safety lifecycle document structure
77	Table A.1 – Example of a documentation structure for information related to the overall safety lifecycle
80	Figure A.1 – Structuring information into document sets for user groups
82	(informative)
83	Annex C (informative) Bibliography

Status	Definitive
Pages	149
Publication Date	2019-01-29
ISBN	978 0 539 03590 2
Standard Number	BS EN 61508-1:2010 – TC
Title	Tracked Changes. Functional safety of electrical/electronic/programmable electronic safety-related systems – General requirements
Identical National Standard Of	IEC 61508-1:2010
Descriptors	Computer applications, Equipment safety, Programmable, Personnel, Management, Documents, Commissioning, Risk assessment, Assessed quality, Verification, Hazards, Life cycle, Repair, Planning, Standardization, Failure (quality control), Grades (quality), Installation, Electronic equipment and components, Electrical components, Electrical equipment, Safety engineering, Electrical safety, Safety devices, Conformity, Maintenance, Risk analysis
Publisher	BSI
Committee	GEL/65/1
ICS Codes	13.110 - Safety of machinery


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