EN 61508-2:2010
(Main)Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 2: Requirements for electrical/electronic/programmable electronic safety-related systems
Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 2: Requirements for electrical/electronic/programmable electronic safety-related systems
IEC 61508-2:2010 applies to any safety-related system, as defined by IEC 61508-1, that contains at least:
- one electrical, electronic or programmable electronic element;
- applies to all elements within an E/E/PE safety-related system;
- specifies how to refine the E/E/PE system safety requirements specification, developed in accordance with IEC 61508-1, into the E/E/PE system design requirements specification;
- specifies the requirements for activities that are to be applied during the design and manufacture of the E/E/PE safety-related systems except software, which is dealt with in IEC 61508-3. These requirements include the application of techniques and measures that:
- are graded against the safety integrity level, for the avoidance of, and control of, faults and failures;
- specifies the information necessary for carrying out the installation, commissioning and final safety validation of the E/E/PE safety-related system;
- provides requirements for the preparation of information and procedures needed by the user for the operation and maintenance of the E/E/PE safety-related systems;
- specifies requirements to be met by the organisation carrying out any modification of the E/E/PE safety-related systems.
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: IEC Standards+ 61508:2010, 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.
Funktionale Sicherheit sicherheitsbezogener elektrischer/elektronischer/programmierbarer elektronischer Systeme - Teil 2: Anforderungen an sicherheitsbezogene elektrische/elektronische/programmierbare elektronische Systeme
Sécurité fonctionnelle des systèmes électriques/électroniques/électroniques programmables relatifs à la sécurité - Partie 2: Exigences pour les systèmes électriques/électroniques/électroniques programmables relatifs à la sécurité
La CEI 61508-2:2010 s'applique à tout système relatif à la sécurité tel que défini dans la CEI 61508-1, qui contient au moins:
- un composant à base électrique, électronique ou électronique programmable;
- s'applique à tous les éléments d'un système E/E/PE relatif à la sécurité;
- spécifie la manière d'affiner la spécification des exigences de sécurité des systèmes E/E/PE, développée conformément à la CEI 61508-1, dans le cadre de la spécification des exigences de conception des systèmes E/E/PE;
- spécifie les exigences pour des activités qui doivent être appliquées pendant la conception et la fabrication des systèmes E/E/PE relatifs à la sécurité, à l'exception du logiciel qui est traité dans la CEI 61508-3.
Ces exigences comprennent l'application de techniques et de mesures qui sont classées en fonction du:
- niveau d'intégrité de sécurité pour éviter et maîtriser les anomalies et défaillances;
- spécifie les informations nécessaires à l'installation, à la mise en service et à la validation finale de la sécurité des systèmes E/E/PE relatifs à la sécurité;
- fournit des exigences relatives à la préparation des informations et procédures nécessaires à l'utilisateur pour l'exploitation et la maintenance des systèmes E/E/PE relatifs à la sécurité;
- spécifie les exigences auxquelles doit satisfaire l'entité qui effectue une modification des systèmes E/E/PE relatifs à la sécurité.
Cette deuxième édition annule et remplace la première édition publiée en 1998 dont elle constitue une révision technique. Elle a fait l'objet d'une révision approfondie et intègre de nombreux commentaires reçus lors des différentes phases de révision. Elle a le statut d'une publication fondamentale de sécurité conformément au Guide CEI 104.
Funkcijska varnost električnih/elektronskih/programljivih elektronskih varnostnih sistemov - 2. del: Zahteve za električne/elektronske/programljive elektronske varnostne sisteme (IEC 61508-2:2010)
1.1 Ta del serije IEC 61508
a) je namenjen uporabi šele po temeljitem razumevanju IEC 61508-1, ki zagotavlja celovit okvir;
b) velja za vse varnostne sisteme, kot jih opredeljuje IEC 61508-1, ki vsebujejo vsaj en električni, elektronski ali programirljiv elektronski element;
d) velja za vse elemente v varnostnem sistemu E/E/PE (vključno s senzorji, aktuatorji in uporabniškim vmesnikom);
d) določa, kako izboljšati specifikacijo za varnostne zahteve sistema E/E/PE, razvito v skladu z IEC 61508-1 (vključno s specifikacijo za zahteve varnostnih funkcij sistema E/E/PE in specifikacijo za zahteve varnostne celovitosti sistema E/E/PE), v okviru specifikacije za zahteve projektiranja sistema E/E/PE;e) določa zahteve za aktivnosti, potrebne med projektiranjem in proizvodnjo varnostnih sistemov E/E/PE (tj. vzpostavlja model varnostnega cikla za sistem E/E/PE), razen programske opreme, ki jo obravnava IEC 61508-3 (glej slike 2 do 4). te zahteve vključujejo uporabo tehnik in ukrepov, razvrščenih glede na stopnjo varnostne celovitosti za preprečevanje in nadzor napak in okvar;
f) določa potrebne informacije za izvedbo namestitve, začetka obratovanja in končne varnostne validacije varnostnih sistemov E/E/PE;
g) ne velja za obratovalno in vzdrževalno fazo varnostnih sistemov E/E/PE – to obravnava IEC 61508-1 – vendar pa IEC 61508-2 zagotavlja zahteve za pripravo informacij in postopkov, ki jih potrebuje uporabnik za obratovanje in vzdrževanje varnostnih sistemov E/E/PE;
h) določa zahteve, ki jih mora izpolnjevati organizacija, ki kakor koli spreminja varnostne sisteme E/E/PE;
OPOMBA 1: Ta del IEC 61508 je v glavnem namenjen dobaviteljem in/ali notranjim inženirskim oddelkom, zato so vključene zahteve za spreminjanje.
OPOMBA 2: Razmerje med IEC 61508-2 in IEC 61508-3 prikazuje slika 4.
i) ne velja za medicinsko opremo v skladu s serijo IEC 60601.
1.2 IEC 61508-1, IEC 61508-2, IEC 61508-3 in IEC 61508-4 so osnovne varnostne objave, čeprav ta status ne velja v okviru nezapletenih varnostnih sistemov E/E/PE (glej točko 3.4.3 IEC 61508-4). Kot osnovne varnostne objave so namenjeni temu, da jih uporabljajo tehnični odbori pri pripravi standardov v skladu z načeli, opredeljenimi v Vodilu IEC 104 in Vodilu ISO/IEC 51. IEC 61508-1, IEC 61508-2, IEC 61508-3 in IEC 61508-4 so namenjeni tudi uporabi kot samostojni standardi. Horizontalno varnostno delovanje tega mednarodnega standarda ne velja za medicinsko opremo v skladu s serijo IEC 60601.
1.3 Ena od odgovornosti tehničnega odbora je, če je primerno, da uporabi temeljne varnostne objave pri pripravi svojih objav. V tem okviru zahteve, preskusne metode ali preskusni pogoji te temeljne varnostne objave ne veljajo, razen če se objave, ki so jih pripravili tehnični odbori, nanje izrecno sklicujejo ali jih vključujejo.
OPOMBA: Funkcijska varnost varnostnih sistemov E/E/PE se lahko doseže le, ko so izpolnjene vse povezane zahteve. Zato je pomembno, da se vse povezane zahteve natančno obravnavajo in so primerno navedene.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2011
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Functional safety of electrical/electronic/programmable electronic safety-related systems
- Part 2: Requirements for electrical/electronic/programmable electronic safety-related
systems (IEC 61508-2:2010)
Funktionale Sicherheit sicherheitsbezogener
elektrischer/elektronischer/programmierbarer elektronischer Systeme - Teil 2:
Anforderungen an sicherheitsbezogene elektrische/elektronische/programmierbare
elektronische Systeme (IEC 61508-2:2010)
Sécurité fonctionnelle des systèmes électriques/électroniques/électroniques
programmables relatifs à la sécurité - Partie 2: Prescriptions pour les systèmes
électriques/électroniques/électroniques programmables relatifs à la sécurité (CEI 61508-
2:2010)
Ta slovenski standard je istoveten z: EN 61508-2:2010
ICS:
25.040.40 Merjenje in krmiljenje Industrial process
industrijskih postopkov measurement and control
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 61508-2
NORME EUROPÉENNE
May 2010
EUROPÄISCHE NORM
ICS 25.040.40 Supersedes EN 61508-2:2001
English version
Functional safety of electrical/electronic/programmable electronic
safety-related systems -
Part 2: Requirements for electrical/electronic/programmable electronic
safety-related systems
(IEC 61508-2:2010)
Sécurité fonctionnelle des systèmes Funktionale Sicherheit sicherheitsbezogener
électriques/électroniques/électroniques elektrischer/elektronischer/programmierbarer
programmables relatifs à la sécurité - elektronischer Systeme -
Partie 2: Exigences pour les systèmes Teil 2: Anforderungen
électriques/électroniques/électroniques an sicherheitsbezogene
programmables relatifs à la sécurité elektrische/elektronische/programmierbare
(CEI 61508-2:2010) elektronische Systeme
(IEC 61508-2:2010)
This European Standard was approved by CENELEC on 2010-05-01. CENELEC 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 obtained 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 Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Management Centre: Avenue Marnix 17, B - 1000 Brussels
© 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61508-2:2010 E
Foreword
The text of document 65A/549/FDIS, future edition 2 of IEC 61508-2, prepared by SC 65A, System
aspects, of IEC TC 65, Industrial-process measurement, control and automation, was submitted to the
IEC-CENELEC parallel vote and was approved by CENELEC as EN 61508-2 on 2010-05-01.
This European Standard supersedes EN 61508-2:2001.
It has the status of a basic safety publication according to IEC Guide 104.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
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) 2011-02-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2013-05-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61508-2:2010 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
[1] IEC 61511 series NOTE Harmonized in EN 61511 series (not modified).
[2] IEC 62061 NOTE Harmonized as EN 62061.
[3] IEC 61800-5-2 NOTE Harmonized as EN 61800-5-2.
[4] IEC 61508-5:2010 NOTE Harmonized as EN 61508-5:2010 (not modified).
[5] IEC 61508-6:2010 NOTE Harmonized as EN 61508-6:2010 (not modified).
[6] IEC 60601 series NOTE Harmonized in EN 60601 series (partially modified).
[7] IEC 61165 NOTE Harmonized as EN 61165.
[8] IEC 61078 NOTE Harmonized as EN 61078.
[9] IEC 61164 NOTE Harmonized as EN 61164.
[10] IEC 62308 NOTE Harmonized as EN 62308.
[11] IEC 61000-6-2 NOTE Harmonized as EN 61000-6-2.
[12] ISO 14224 NOTE Harmonized as EN ISO 14224.
[14] ISO 9000 NOTE Harmonized as EN ISO 9000.
[15] IEC 60300-3-2 NOTE Harmonized as EN 60300-3-2.
__________
- 3 - EN 61508-2:2010
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year
- - Relays with forcibly guided (mechanically EN 50205 -
linked) contacts
IEC 60947-5-1 - Low-voltage switchgear and controlgear - EN 60947-5-1 -
Part 5-1: Control circuit devices
and switching elements - Electromechanical
control circuit devices
IEC/TS 61000-1-2 - Electromagnetic compatibility (EMC) - - -
Part 1-2: General - Methodology for the
achievement of functional safety of electrical
and electronic systems including equipment
with regard to electromagnetic phenomena
IEC 61326-3-1 - Electrical equipment for measurement, EN 61326-3-1 -
control and laboratory use - EMC
requirements -
Part 3-1: Immunity requirements for safety-
related systems and for equipment intended to
perform safety-related functions (functional
safety) - General industrial applications
IEC 61508-1 2010 Functional safety of EN 61508-1 2010
electrical/electronic/programmable electronic
safety-related systems -
Part 1: General requirements
IEC 61508-3 2010 Functional safety of EN 61508-3 2010
electrical/electronic/programmable electronic
safety-related systems -
Part 3: Software requirements
IEC 61508-4 2010 Functional safety of EN 61508-4 2010
electrical/electronic/programmable electronic
safety-related systems -
Part 4: Definitions and abbreviations
IEC 61508-7 2010 Functional safety of EN 61508-7 2010
electrical/electronic/programmable electronic
safety-related systems -
Part 7: Overview of techniques and measures
IEC 61784-3 - Industrial communication networks - EN 61784-3 -
Profiles -
Part 3: Functional safety fieldbuses - General
rules and profile definitions
Publication Year Title EN/HD Year
IEC 62280-1 - Railway applications - Communication, - -
signalling and processing systems -
Part 1: Safety-related communication in
closed transmission systems
IEC 62280-2 - Railway applications - Communication, - -
signalling and processing systems -
Part 2: Safety-related communication in open
transmission systems
IEC Guide 104 1997 The preparation of safety publications - -
and the use of basic safety publications and
group safety publications
ISO/IEC Guide 51 1999 Safety aspects - Guidelines - -
for their inclusion in standards
IEC 61508-2 ®
Edition 2.0 2010-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ
Functional safety of electrical/electronic/programmable electronic safety-related
systems –
Part 2: Requirements for electrical/electronic/programmable electronic safety-
related systems
Sécurité fonctionnelle des systèmes électriques/électroniques/électroniques
programmables relatifs à la sécurité –
Partie 2: Exigences pour les systèmes électriques/électroniques/électroniques
programmables relatifs à la sécurité
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
XD
CODE PRIX
ICS 25.040.40 ISBN 978-2-88910-525-0
– 2 – 61508-2 © IEC:2010
CONTENTS
FOREWORD.5
INTRODUCTION.7
1 Scope.9
2 Normative references .12
3 Definitions and abbreviations.12
4 Conformance to this standard.12
5 Documentation .13
6 Management of functional safety .13
7 E/E/PE system safety lifecycle requirements .13
7.1 General .13
7.1.1 Objectives and requirements – general.13
7.1.2 Objectives .13
7.1.3 Requirements .13
7.2 E/E/PE system design requirements specification .17
7.2.1 Objective .17
7.2.2 General .17
7.2.3 E/E/PE system design requirements specification.18
7.3 E/E/PE system safety validation planning .19
7.3.1 Objective .19
7.3.2 Requirements .19
7.4 E/E/PE system design and development.19
7.4.1 Objective .20
7.4.2 General requirements .20
7.4.3 Synthesis of elements to achieve the required systematic capability.22
7.4.4 Hardware safety integrity architectural constraints.23
7.4.5 Requirements for quantifying the effect of random hardware failures .32
7.4.6 Requirements for the avoidance of systematic faults .34
7.4.7 Requirements for the control of systematic faults.35
7.4.8 Requirements for system behaviour on detection of a fault .35
7.4.9 Requirements for E/E/PE system implementation .36
7.4.10 Requirements for proven in use elements .38
7.4.11 Additional requirements for data communications .39
7.5 E/E/PE system integration.40
7.5.1 Objective .40
7.5.2 Requirements .40
7.6 E/E/PE system operation and maintenance procedures .41
7.6.1 Objective .41
7.6.2 Requirements .41
7.7 E/E/PE system safety validation .42
7.7.1 Objective .42
7.7.2 Requirements .42
7.8 E/E/PE system modification.43
7.8.1 Objective .43
7.8.2 Requirements .
...
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