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1、BRITISH STANDARD BS EN
61508-1:2002
Incorporating Corrigendum No.1 to BS IEC 61508-1:1998 and Amendment No.1 to BS IEC
61508-1:1998
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Functional safety of
e
2、lectrical/electronic/ programmable electronic
safety-related systems —
Part 1: General requirements
The European Standard EN 61508-1:2001 has the status of a
British Standard
ICS 25.040.40; 29.020
3、
(renumbers the
BS IEC as
BS EN 61508-1:2002)
BS EN 61508-1:2002
National foreword
This British Standard is the official English language version of
EN 61508-1:2001. It is identical with IEC 61508-1:1998 including corrigendum
4、
May 1999.
The UK participation in its preparation was entrusted to Technical Committee GEL/65, Measurement and control, to Subcommittee GEL/65/1, System considerations, which has the responsibility to:
— aid enquirers to understand the text;
— present to the responsible international/Europe
5、an committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed;
— monitor related international and European developments and promulgate them in the UK.
A list of organizations represented on this committee can be obtained on request to its secret
6、ary.
Cross-references
The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index〞, or by using the “Find〞 facility of the BSI Standard
7、s Electronic Catalogue.
A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application.
Compliance with a British Standard does not of itself confer immunity from legal obligations.
8、
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This British Standard, having been prepared under the direction of the Electrotechnical Sector Committee, was published under the authority of the St
9、andards Committee and comes into effect
on 15 June 1999
? BSI 15 March 2002
ISBN 0 580 32719 1
Summary of pages
This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 59 and a back cover.
The BSI copyright date displayed in this
10、 document indicates when the document was last issued.
Amd. No.
Date
Comments
10631
Corrigendum No.1
August 1999
Incorporation of IEC Corrigendum
May 1999
13779
15 March 2002
Implementation of the European Standard
Amendments issued since publication
EUROPEAN S
11、TANDARD EN 61508-1
NORME EUROPéENNE
EUROP?ISCHE NORM December 2001
ICS 13.110;25.040;29.020;35.240.50
English version
Functional safety of electrical/electronic/programmable electronic safety-related systems
Part 1: General requirements
(IEC 61508-1:1998 + corrigendum 1999)
12、
Sécurité fonctionnelle des systèmes électriques/électroniques/électroniques programmables relatifs à la sécurité Partie 1: Prescriptions générales
(CEI 61508-1:1998 + corrigendum 1999)
Funktionale Sicherheit sicherheitsbezogener elektrischer/ elektronischer/programmierbarer elektronischer Sy
13、steme
Teil 1: Allgemeine Anforderungen
(IEC 61508-1:1998 + Corrigendum 1999)
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This European Standard was approved by CENELEC on 2001-07-03. CE
14、NELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtaine
15、d on application to the Central Secretariat or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Cent
16、ral Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, S
17、weden, Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europ?isches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
? 2001 CENELEC -
18、 All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61508-1:2001 E
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Foreword
The text
19、of the International Standard IEC 61508-1:1998 including its corrigendum May 1999, prepared by SC 65A, System aspects, of IEC TC 65, Industrial-process measurement and control, was submitted to the Unique Acceptance Procedure and was approved by CENELEC as EN 61508-1 on 2001-07-03 without an
20、y modification.
The following dates were fixed:
– latest date by which the EN has to be implemented at national level by publication of an identical
national standard or by endorsement (dop) 2002-08-01
– latest date by which the national standards conflicting
with the EN have to be wi
21、thdrawn (dow) 2004-08-01
Annexes designated "normative" are part of the body of the standard. Annexes designated "informative" are given for information only.
In this standard, annex ZA is normative and annexes A, B and C are informative.
Annex ZA has been added by CENELEC.
IEC 61508 is
22、a basic safety publication covering the functional safety of electrical, electronic and programmable electronic safety-related systems. The scope states:
"This International Standard covers those aspects to be considered when electrical/electronic/ programmable electronic systems (E/E/PESs) are u
23、sed to carry out safety functions. A major objective of this standard is to facilitate the development of application sector international standards by the technical committees responsible for the application sector. This will allow all the relevant factors associated with the application, to be ful
24、ly taken into account and thereby meet the specific needs of the application sector. A dual objective of this standard is to enable the development of electrical/electronic/programmable electronic (E/E/PE) safety-related systems where application sector international standards may not exist".
T
25、he CENELEC Report R0BT-004, ratified by 103 BT (March 2000) accepts that some IEC standards, which today are either published or under development, are sector implementations of IEC 61508. For example:
IEC 61511, Functional safety - Safety instrumented systems for the process industry sector;
26、
IEC 62061, Safety of machinery – Functional safety of electrical, electronic and programmable electronic control systems;
IEC 61513, Nuclear power plants – Instrumentation and control for systems important to safety – General requirements for systems.
The railways sector has also devel
27、oped a set of European Standards (EN 50126; EN 50128 and prEN 50129).
NOTE EN 50126 and EN 50128 were based on earlier drafts of IEC 61508. prEN 50129 is based on the principles of the latest version of IEC 61508.
This list does not preclude other sector implementations of IEC 61508 which
28、 could be currently under development or published within IEC or CENELEC.
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Endorsement notice
The text of the International Standard IEC 61508-1:1998
29、 including its corrigendum May 1999 was approved by CENELEC as a European Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 61355:1997 NOTE Harmonized as EN 61355:1997 (not modified).
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CONTENTS
Page
INTRODUCTION .................................................................................................................. 6
Clause
31、
1 Scope ............................................................................................................................ 8
2 Normative references ..................................................................................................... 11
3 Definitions and abbreviations .
32、......................................................................................... 11
4 Conformance to this standard ......................................................................................... 12
5 Documentation .................................................................
33、.............................................. 12
5.1 Objectives ............................................................................................................. 12
5.2 Requirements ...................................................................................................
34、.... 13
6 Management of functional safety .................................................................................... 14
6.1 Objectives ............................................................................................................. 14
6.2 Requirements ..................
35、..................................................................................... 14
7 Overall safety lifecycle requirements .............................................................................. 16
7.1 General..........................................................................
36、....................................... 16
7.2 Concept ................................................................................................................ 25
7.3 Overall scope definition ......................................................................................... 25
37、
7.4 Hazard and risk analysis ....................................................................................... 26
7.5 Overall safety requirements ................................................................................... 28
7.6 Safety requirements allocation ..................
38、............................................................ 29
7.7 Overall operation and maintenance planning ......................................................... 35
7.8 Overall safety validation planning .......................................................................... 36
7.
39、9 Overall installation and commissioning planning .................................................... 37
7.10 Realisation: E/E/PES............................................................................................. 38
7.11 Realisation: other technology .............................
40、................................................... 38
7.12 Realisation: external risk reduction facilities .......................................................... 38
7.13 Overall installation and commissioning .................................................................. 39
7.14
41、 Overall safety validation ........................................................................................ 39
7.15 Overall operation, maintenance and repair............................................................. 40
7.16 Overall modification and retrofit .......................
42、...................................................... 43
7.17 Decommissioning or disposal ................................................................................ 45
7.18 Verification ...................................................................................................
43、......... 46
8 Functional safety assessment......................................................................................... 47
8.1 Objective .............................................................................................................. 47
8.2 Requirements ............
44、........................................................................................... 47
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Annexes
Annex A (informative) Example documentation struc
45、ture ....................................................... 50
A.1 General .................................................................................................................. 50
A.2 Safety lifecycle document structure ................................................................
46、......... 51
A.3 Physical document structure ................................................................................... 54
A.4 List of documents.................................................................................................... 56
Annex B (informative) Competence of pers
47、ons ...................................................................... 57
B.1 Objective ................................................................................................................ 57
B.2 General considerations ...............................................................
48、............................ 57
Annex C (informative) Bibliography ....................................................................................... 58
Annex ZA (normative) Normative references to international publications with their
corresponding European publications ..................
49、................................................................................. 59
Tables
1 Overall safety lifecycle: overview .................................................................................... 20
2 Safety integrity levels: target failure measures for a safety function, al
50、located to
an E/E/PE safety-related system operating in low demand mode of operation ................. 33
3 Safety integrity levels: target failure measures for a safety function, allocated to an E/E/PE safety-related system operating in high demand or continuous mode
of operation .............
51、....................................................................................................... 33
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 figure 2)) ................... 49
5 M
52、inimum levels of independence of those carrying out functional safety assessment
(overall safety lifecycle phase 9 - includes all phases of E/E/PES and software safety
lifecycles (see figures 2, 3 and 4)) ................................................................................. 49
A.1 Exa
53、mple documentation structure for information related to the overall
safety lifecycle ............................................................................................................... 52
A.2 Example documentation structure for information related to the E/E/PES
safety lifecycle .....
54、.......................................................................................................... 53
A.3 Example documentation structure for information related to the software
safety lifecycle ...............................................................................................
55、................ 54
Figures
1 Overall framework of this standard ................................................................................. 10
2 Overall safety lifecycle.................................................................................................... 17
3 E/E/PES sa
56、fety lifecycle (in realisation phase) ............................................................... 18
4 Software safety lifecycle (in realisation phase) ................................................................ 18
5 Relationship of overall safety lifecycle to E/E/PES and software safety
57、lifecycles ............. 19
6 Allocation of safety requirements to the E/E/PE safety-related systems,
other technology safety-related systems and external risk reduction facilities .................. 32
7 Example operations and maintenance activities model ........................................
58、............ 42
8 Example operation and maintenance management model ............................................... 43
9 Example modification procedure model .......................................................................... 45
A.1 Structuring information into document sets for user grou
59、ps ............................................. 55
A.2 Structuring information for large complex systems and small low
complexity systems ........................................................................................................ 55
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INTRODUCTION
Systems comprised of electrical and/or electronic components have been used for many years to perform safety functions in most application sectors. Computer-based systems (genericall
61、y referred to as programmable electronic systems (PESs)) are being used in all application sectors to perform non-safety functions and, increasingly, to perform safety functions. If computer system technology is to be effectively and safely exploited, it is essential that thos
62、e responsible for making decisions have sufficient guidance on the safety aspects on which to make these decisions.
This International Standard sets out a generic approach for all safety lifecycle activities for systems comprised of electrical and/or electronic and/or programmable electronic co
63、mponents (electrical/electronic/programmable electronic systems (E/E/PESs)) that are used to perform safety functions. This unified approach has been adopted in order that a rational and consistent technical policy be developed for all electrically-based safety-related systems. A major obj
64、ective is to facilitate the development of application sector standards.
In most situations, safety is achieved by a number of protective systems which rely on many technologies (for example mechanical, hydraulic, pneumatic, electrical, electronic, programmable electronic). Any safety strategy
65、must therefore consider not only all the elements within an individual system (for example sensors, controlling devices and actuators) but also all the safety-related systems making up the total combination of safety-related systems. Therefore, while this International Standard is concer
66、ned with electrical/electronic/programmable electronic (E/E/PE) safety-related systems, it may also provide a framework within which safety-related systems based on other technologies may be considered.
It is recognized that there is a great variety of E/E/PES applications in a variety of application sectors and covering a wide range of complexity, hazard and risk potentials. In any particular application, the required safety measures will be dependent on many factors specific to
【bs英國(guó)標(biāo)準(zhǔn)】bs en 6150812017 functional safety of electricalelectronic programmable electronic safetyrelated systems — part 1 general requirements
