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
- Status
- Published
- Publication Date
- 27-May-2010
- Withdrawal Date
- 30-Apr-2013
- Technical Committee
- CLC/TC 65X - Industrial-process measurement, control and automation
- Drafting Committee
- IEC/SC 65A - IEC_SC_65A
- Parallel Committee
- IEC/SC 65A - IEC_SC_65A
- Current Stage
- 6060 - Document made available - Publishing
- Start Date
- 28-May-2010
- Completion Date
- 28-May-2010
Relations
- Effective Date
- 28-Jan-2023
- Effective Date
- 23-Jan-2023
Overview
EN 61508-2:2010 (identical to IEC 61508-2:2010) is Part 2 of the IEC 61508 family addressing the functional safety of electrical/electronic/programmable electronic (E/E/PE) safety‑related systems. It applies to any safety‑related system that contains at least one electrical, electronic or programmable electronic element and covers all elements within an E/E/PE safety‑related system except for software (software requirements are handled in IEC 61508-3). This edition is a technical revision of the original standard and has the status of a basic safety publication.
Key topics and technical requirements
- E/E/PE system safety lifecycle: Requirements for the realisation phase, from design input to validation and modification.
- Refinement of system requirements: How to turn the E/E/PE system safety requirements (from IEC 61508‑1) into detailed design requirements.
- Safety Integrity Levels (SIL): Techniques and measures are graded against the required SIL to avoid and control faults and failures.
- Hardware architecture constraints: Rules for structuring hardware and determining maximum achievable SIL for architectures and subsystems.
- Quantification of random hardware failures: Methods and assumptions for calculating effects of random failures (see normative annexes).
- Avoidance and control of systematic faults: Lifecycle activities and design practices to reduce systematic errors (normative annexes B, F).
- Diagnostics and safe failure fraction: Diagnostic coverage and SFF considerations (Annex C).
- Installation, commissioning and final safety validation: Information and procedures required to install, commission and validate an E/E/PE safety‑related system.
- Operation, maintenance and modification: Requirements for user information, maintenance procedures and organisational responsibilities for system changes.
- Proven-in-use elements & data communications: Rules for using previously deployed components and special considerations for safety‑related communications.
Practical applications
This standard is used to design, build, verify and validate safety functions implemented partly or wholly in electrical/electronic/programmable electronic technologies. Typical applications include:
- Industrial process control and automation
- Smart grid protection and control systems (noted as highly relevant)
- Railway signalling and safety communication subsystems
- Safety instrumented systems and machine safety equipment
Who should use this standard
- Functional safety engineers and system designers
- OEMs and manufacturers of E/E/PE safety-related equipment
- System integrators and control‑system architects
- Safety assessors, certification bodies and compliance teams
- Installation, commissioning and maintenance personnel
Related standards
- IEC 61508‑1 (general requirements)
- IEC 61508‑3 (software requirements)
- IEC 61508‑4 (definitions)
- IEC 61508‑7 (overview of techniques and measures)
- Sector standards that reference or harmonize with IEC 61508 (e.g., EN 61511 for process industry, IEC 62061 for machinery)
Keywords: EN 61508-2:2010, IEC 61508-2:2010, functional safety, E/E/PE safety-related systems, safety lifecycle, SIL, safety validation, smart grid.
Frequently Asked Questions
EN 61508-2:2010 is a standard published by CLC. Its full title is "Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 2: Requirements for electrical/electronic/programmable electronic safety-related systems". This standard covers: 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.
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.
EN 61508-2:2010 is classified under the following ICS (International Classification for Standards) categories: 25.040.40 - Industrial process measurement and control. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 61508-2:2010 has the following relationships with other standards: It is inter standard links to EN 61508-2:2001, prEN IEC 61508-2:2025. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase EN 61508-2:2010 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CLC standards.
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 .43
7.9 E/E/PE system verification .44
7.9.1 Objective .44
61508-2 © IEC:2010 – 3 –
7.9.2 Requirements .44
8 Functional safety assessment.46
Annex A (normative) Techniques and measures for E/E/PE safety-related systems –
control of failures during operation.47
Annex B (normative) Techniques and measures for E/E/PE safety-related systems –
avoidance of systematic failures during the different phases of the lifecycle .62
Annex C (normative) Diagnostic coverage and safe failure fraction.71
Annex D (normative) Safety manual for compliant items .74
Annex E (normative) Special architecture requirements for integrated circuits (ICs)
with on-chip redundancy .76
Annex F (informative) Techniques and measures for ASICs – avoidance of systematic
failures .81
Bibliography.89
Figure 1 – Overall framework of the IEC 61508 series .11
Figure 2 – E/E/PE system safety lifecycle (in realisation phase).14
Figure 3 – ASIC development lifecycle (the V-Model).15
Figure 4 – Relationship between and scope of IEC 61508-2 and IEC 61508-3 .15
Figure 5 – Determination of the maximum SIL for specified architecture (E/E/PE safety-
related subsystem comprising a number of series elements, see 7.4.4.2.3) .28
Figure 6 – Determination of the maximum SIL for specified architecture (E/E/PE safety-
related subsystem comprised of two subsystems X & Y, see 7.4.4.2.4).30
Figure 7 – Architectures for data communication.40
Table 1 – Overview – realisation phase of the E/E/PE system safety lifecycle.16
Table 2 – Maximum allowable safety integrity level for a safety function carried out by
a type A safety-related element or subsystem.26
Table 3 – Maximum allowable safety integrity level for a safety function carried out by
a type B safety-related element or subsystem.27
Table A.1 – Faults or failures to be assumed when quantifying the effect of random
hardware failures or to be taken into account in the derivation of safe failure fraction .49
Table A.2 – Electrical components .51
Table A.3 – Electronic components.51
Table A.4 – Processing units .52
Table A.5 – Invariable memory ranges.52
Table A.6 – Variable memory ranges .53
Table A.7 – I/O units and interface (external communication).53
Table A.8 – Data paths (internal communication) .54
Table A.9 – Power supply .54
Table A.10 – Program sequence (watch-dog).55
Table A.11 – Clock .55
Table A.12 – Communication and mass-storage .55
Table A.13 – Sensors .56
Table A.14 – Final elements (actuators).56
Table A.15 – Techniques and measures to control systematic failures caused by
hardware design .58
– 4 – 61508-2 © IEC:2010
Table A.16 – Techniques and measures to control systematic failures caused by
environmental stress or influences.59
Table A.17 – Techniques and measures to control systematic operational failures.60
Table A.18 – Effectiveness of techniques and measures to control systematic failures .61
Table B.1 – Techniques and measures to avoid mistakes during specification of
E/E/PE system design requirements (see 7.2) .63
Table B.2 – Techniques and measures to avoid introducing faults during E/E/PE
system design and development (see 7.4) .64
Table B.3 – Techniques and measures to avoid faults during E/E/PE system
integration (see 7.5).65
Table B.4 – Techniques and measures to avoid faults and failures during E/E/PE
system operation and maintenance procedures (see 7.6).66
Table B.5 – Techniques and measures to avoid faults during E/E/PE system safety
validation (see 7.7) .67
Table B.6 – Effectiveness of techniques and measures to avoid systematic failures.68
Table E.1 – Techniques and measures that increase β .79
B-IC
Table E.2 – Techniques and measures that decrease β .80
B-IC
Table F.1 – Techniques and measures to avoid introducing faults during ASIC’s design
and development – full and semi-custom digital ASICs (see 7.4.6.7).83
Table F.2 – Techniques and measures to avoid introducing faults during ASIC design
and development: User programmable ICs (FPGA/PLD/CPLD) (see 7.4.6.7) .86
61508-2 © IEC:2010 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FUNCTIONAL SAFETY OF ELECTRICAL/ELECTRONIC/
PROGRAMMABLE ELECTRONIC SAFETY-RELATED SYSTEMS –
Part 2: Requirements for electrical/electronic/programmable
electronic safety-related systems
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
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with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61508-2 has been prepared by subcommittee 65A: System
aspects, of IEC technical committee 65: Industrial-process measurement, control and
automation.
This second edition cancels and replaces the first edition published in 2000. This edition
constitutes a technical revision.
This edition 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.
– 6 – 61508-2 © IEC:2010
The text of this standard is based on the following documents:
FDIS Report on voting
65A/549/FDIS 65A/573/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2
A list of all parts of the IEC 61508 series, published under the general title Functional safety
of electrical / electronic / programmable electronic safety-related systems, can be found on
the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
61508-2 © IEC:2010 – 7 –
INTRODUCTION
Systems comprised of electrical and/or electronic elements have been used for many years to
perform safety functions in most application sectors. Computer-based systems (generically
referred to as programmable electronic systems) 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 those
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 (E/E/PE)
elements 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 objective is to facilitate the development of product and
application sector international standards based on the IEC 61508 series.
NOTE 1 Examples of product and application sector international standards based on the IEC 61508 series are
given in the Bibliography (see references [1], [2] and [3]).
In most situations, safety is achieved by a number of systems which rely on many
technologies (for example mechanical, hydraulic, pneumatic, electrical, electronic,
programmable electronic). Any safety strategy 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 concerned with 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 applications using E/E/PE safety-related
systems 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 the application. This International Standard, by being
generic, will enable such measures to be formulated in future product and application sector
international standards and in revisions of those that already exist.
This International Standard
– considers all relevant overall, E/E/PE system and software safety lifecycle phases (for
example, from initial concept, though design, implementation, operation and maintenance
to decommissioning) when E/E/PE systems are used to perform safety functions;
– has been conceived with a rapidly developing technology in mind; the framework is
sufficiently robust and comprehensive to cater for future developments;
– enables product and application sector international standards, dealing with E/E/PE
safety-related systems, to be developed; the development of product and application
sector international standards, within the framework of this standard, should lead to a high
level of consistency (for example, of underlying principles, terminology etc.) both within
application sectors and across application sectors; this will have both safety and economic
benefits;
– provides a method for the development of the safety requirements specification necessary
to achieve the required functional safety for E/E/PE safety-related systems;
– adopts a risk-based approach by which the safety integrity requirements can be
determined;
– introduces safety integrity levels for specifying the target level of safety integrity for the
safety functions to be implemented by the E/E/PE safety-related systems;
NOTE 2 The standard does not specify the safety integrity level requirements for any safety function, nor does it
mandate how the safety integrity level is determined. Instead it provides a risk-based conceptual framework and
example techniques.
– 8 – 61508-2 © IEC:2010
– sets target failure measures for safety functions carried out by E/E/PE safety-related
systems, which are linked to the safety integrity levels;
– a low demand mode of operation, the lower limit is set at an average probability of a
–5
dangerous failure on demand of 10 ;
– a high demand or a continuous mode of operation, the lower limit is set at an average
–9 –1
frequency of a dangerous failure of 10 [h ];
NOTE 3 A single E/E/PE safety-related system does not necessarily mean a single-channel architecture.
NOTE 4 It may be possible to achieve designs of safety-related systems with lower values for the target safety
integrity for non-complex systems, but these limits are considered to represent what can be achieved for relatively
complex systems (for example programmable electronic safety-related systems) at the present time.
– sets requirements for the avoidance and control of systematic faults, which are based on
experience and judgement from practical experience gained in industry. Even though the
probability of occurrence of systematic failures cannot in general be quantified the
standard does, however, allow a claim to be made, for a specified safety function, that the
target failure measure associated with the safety function can be considered to be
achieved if all the requirements in the standard have been met;
– introduces systematic capability which applies to an element with respect to its confidence
that the systematic safety integrity meets the requirements of the specified safety integrity
level;
– adopts a broad range of principles, techniques and measures to achieve functional safety
for E/E/PE safety-related systems, but does not explicitly use the concept of fail safe.
However, the concepts of “fail safe” and “inherently safe” principles may be applicable and
adoption of such concepts is acceptable providing the requirements of the relevant
clauses in the standard are met.
61508-2 © IEC:2010 – 9 –
FUNCTIONAL SAFETY OF ELECTRICAL/ELECTRONIC/
PROGRAMMABLE ELECTRONIC SAFETY-RELATED SYSTEMS –
Part 2: Requirements for electrical/electronic/programmable
electronic safety-related systems
1 Scope
1.1 This part of the IEC 61508 series
a) is intended to be used only after a thorough understanding of IEC 61508-1, which provides
the overall framework for the achievement of functional safety;
b) applies to any safety-related system, as defined by IEC 61508-1, that contains at least
one electrical, electronic or programmable electronic element;
c) applies to all elements within an E/E/PE safety-related system (including sensors,
actuators and the operator interface);
d) specifies how to refine the E/E/PE system safety requirements specification, developed in
accordance with IEC 61508-1 (comprising the E/E/PE system safety functions
requirements specification and the E/E/PE system safety integrity requirements
specification), into the E/E/PE system design requirements specification;
e) specifies the requirements for activities that are to be applied during the design and
manufacture of the E/E/PE safety-related systems (i.e. establishes the E/E/PE system
safety lifecycle model) except software, which is dealt with in IEC 61508-3 (see Figures 2
to 4). 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;
f) specifies the information necessary for carrying out the installation, commissioning and
final safety validation of the E/E/PE safety-related systems;
g) does not apply to the operation and maintenance phase of the E/E/PE safety-related
systems – this is dealt with in IEC 61508-1 – however, IEC 61508-2 does provide
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;
h) specifies requirements to be met by the organisation carrying out any modification of
the E/E/PE safety-related systems;
NOTE 1 This part of IEC 61508 is mainly directed at suppliers and/or in-company engineering departments, hence
the inclusion of requirements for modification.
NOTE 2 The relationship between IEC 61508-2 and IEC 61508-3 is illustrated in Figure 4.
i) does not apply for medical equipment in compliance with the IEC 60601 series.
1.2 IEC 61508-1, IEC 61508-2, IEC 61508-3 and IEC 61508-4 are basic safety publications,
although this status does not apply in the context of low complexity E/E/PE safety-related
systems (see 3.4.3 of IEC 61508-4). As basic safety publications, they are intended for use by
technical committees in the preparation of standards in accordance with the principles
contained in IEC Guide 104 and ISO/IEC Guide 51. IEC 61508-1, IEC 61508-2, IEC 61508-3
and IEC 61508-4 are also intended for use as stand-alone standards. The horizontal safety
function of this international standard does not apply to medical equipment in compliance with
the IEC 60601 series.
1.3 One of the responsibilities of a technical committee is, wherever applicable, to make use
of basic safety publications in the preparation of its publications. In this context, the
requirements, test methods or test conditions of this basic safety publication will not apply
– 10 – 61508-2 © IEC:2010
unless specifically referred to or included in the publications prepared by those technical
committees.
NOTE The functional safety of an E/E/PE safety-related system can only be achieved when all related
requirements are met. Therefore, it is important that all related requirements are carefully considered and
adequately referenced.
1.4 Figure 1 shows the overall framework of the IEC 61508 series and indicates the role that
IEC 61508-2 plays in the achievement of functional safety for E/E/PE safety-related systems.
Annex A of IEC 61508-6 describes the application of IEC 61508-2 and IEC 61508-3.
61508-2 © IEC:2010 – 11 –
Figure 1 – Overall framework of the IEC 61508 series
– 12 – 61508-2 © IEC:2010
2 Normative references
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.
IEC 60947-5-1, Low-voltage switchgear and controlgear – 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, 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 electrical/electronic/programmable electronic safety-
related systems – Part 1: General requirements
IEC 61508-3: 2010, Functional safety of electrical/electronic/programmable electronic safety-
related systems – Part 3: Software requirements
IEC 61508-4: 2010, Functional safety of electrical/electronic/programmable electronic safety-
related systems – Part 4: Definitions and abbreviations
IEC 61508-7: 2010, Functional safety of electrical/electronic/programmable electronic safety
related systems – Part 7: Overview of techniques and measures
IEC 61784-3, Industrial communication networks – Profiles – Part 3: Functional safety
fieldbuses – General rules and profile definitions
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
EN 50205, Relays with forcibly guided (mechanically linked) contacts
3 Definitions and abbreviations
For the purposes of this document, the definitions and abbreviations given in IEC 61508-4
apply.
4 Conformance to this standard
The requirements for conformance to this standard are as detailed in Clause 4 of
IEC 61508-1.
61508-2 © IEC:2010 – 13 –
5 Documentation
The requirements for documentation are as detailed in Clause 5 of IEC 61508-1.
6 Management of functional safety
The requirements for management of functional safety are as detailed in Clause 6 of
IEC 61508-1.
7 E/E/PE system safety lifecycle requirements
7.1 General
7.1.1 Objectives and requirements – general
7.1.1.1 This subclause sets out the objectives and requirements for the E/E/PE system
safety lifecycle phases.
NOTE The objectives and requirements for the overall safety lifecycle, together with a general introduction to the
structure of the standard, are given in IEC 61508-1.
7.1.1.2 For all phases of the E/E/PE system safety lifecycle, Table 1 indicates
– the objectives to be achieved;
– the scope of the phase;
– a reference to the subclause containing the requirements;
– the required inputs to the phase;
– the outputs required to comply with the subclause.
7.1.2 Objectives
7.1.2.1 The first objective of the requirements of this subclause is to structure, in a
systematic manner, the phases in the E/E/PE system safety lifecycle that shall be considered
in order to achieve the required functional safety of the E/E/PE safety-related systems.
7.1.2.2 The second objective of the requirements of this subclause is to document all
information relevant to the functional safety of the E/E/PE safety-related systems throughout
the E/E/PE system safety lifecycle.
7.1.3 Requirements
7.1.3.1 The E/E/PE system safety lifecycle that shall be used in claiming conformance with
this standard is that specified in Figure 2. A detailed V-model of the ASIC development
lifecycle for the design of ASICs (see IEC 61508-4, 3.2.15) is shown in Figure 3. If another
E/E/PE system safety lifecycle or ASIC development lifecycle is used, it shall be specified as
part of the management of functional safety activities (see Clause 6 of IEC 61508-1), and all
the objectives and requirements of each subclause of IEC 61508-2 shall be met.
NOTE 1 The relationship between and scope for IEC 61508-2 and IEC 61508-3 are shown in Figure 4.
NOTE 2 There are significant similarities between the ASIC and the software design processes. IEC 61508-3
recommends the V-model for designing safety-related software. The V-model requires a clearly structured design
process and a modular software structure for avoiding and controlling systematic faults. The ASIC development
lifecycle for the design of ASICs in Figure 3 follows this model. At first the requirements for the ASIC specification
are derived from the system requirements. ASIC architecture, ASIC design and module design follow. The results
of each step on the left-hand side of the V become the input to the next step, and are also fed back to the
preceding step for iteration where appropriate, until the final code is created. This code is verified against the
corresponding design through post-layout simulation, module testing, module integration testing and verification of
the complete ASIC. The results of any step may necessitate a revision to any of the preceding steps. Finally, the
ASIC is validated after its integration into the E/E/PE safety-related system.
– 14 – 61508-2 © IEC:2010
7.1.3.2 The procedures for management of functional safety (see Clause 6 of IEC 61508-1)
shall run in parallel with the E/E/PE system safety lifecycle phases.
7.1.3.3 Each phase of the E/E/PE system safety lifecycle shall be divided into elementary
activities, with the scope, inputs and outputs specified for each phase (see Table 1).
7.1.3.4 Unless justified as part of the management of functional safety activities (see
Clause 6 of IEC 61508-1), the outputs of each phase of the E/E/PE system safety lifecycle
shall be documented (see Clause 5 of IEC 61508-1).
7.1.3.5 The outputs for each E/E/PE system safety lifecycle phase shall meet the objectives
and requirements specified for each phase (see 7.2 to
...
제목: EN 61508-2:2010 - 전기/전자/프로그래밍 가능한 전자 안전관련 시스템의 기능적 안전성 - 제2부: 전기/전자/프로그래밍 가능한 전자 안전관련 시스템의 요구사항 내용: IEC 61508-2:2010은 IEC 61508-1에 정의된 대로 적어도 한 개의 전기, 전자 또는 프로그래밍 가능한 전자 요소를 포함하는 모든 안전관련 시스템에 적용됩니다. - E/E/PE 안전관련 시스템 내의 모든 요소에 적용됩니다. - IEC 61508-1에 따라 개발된 E/E/PE 시스템 안전 요구사항 명세를 E/E/PE 시스템 설계 요구사항 명세로 세분화하는 방법을 지정합니다. - 소프트웨어에 대해서는 IEC 61508-3에서 다루기 때문에, E/E/PE 안전관련 시스템의 설계 및 제조에 적용되는 활동의 요구사항을 지정합니다. 이러한 요구사항에는 결함 및 장애의 회피 및 통제를 위한 안전 무결성 수준에 따라 그레이드가 매겨지는 기법과 조치의 적용이 포함됩니다. - E/E/PE 안전관련 시스템의 설치, 적용 및 최종 안전 검증을 수행하기 위해 필요한 정보를 지정합니다. - 사용자가 E/E/PE 안전관련 시스템의 운영 및 유지보수를 위해 필요한 정보 및 절차의 준비를 위한 요구사항을 제공합니다. - E/E/PE 안전관련 시스템의 수정을 수행하는 조직이 충족해야 할 요구사항을 지정합니다. 이 제2판은 1998년에 발표된 첫 번째 판을 취소하고 대신에 발간되었습니다. 이 판은 기술적 개정으로, 다양한 개정 단계에서 수신된 많은 의견을 포함하고 있는 철저한 검토를 거쳤습니다. IEC 가이드 104에 따라 기본 안전 출판물의 지위를 가지고 있습니다. 새로 추가된 항목! IEC Standards+ 61508:2010도 제공됩니다. 모든 부분과 함께 코멘트가 있는 레드라인 버전입니다. 이 2판에서의 변경 사항은 세계적인 전문가에 의해 강조되고 코멘트가 달려있습니다. 본 출판물은 스마트 그리드에 매우 관련이 있습니다.
The article discusses the standard EN 61508-2:2010, which focuses on the functional safety of electrical/electronic/programmable electronic safety-related systems. This standard applies to any safety-related system that includes at least one electrical, electronic, or programmable electronic element. It provides requirements for refining the system safety requirements into the system design requirements. The standard also specifies activities to be applied during the design and manufacture of the safety-related systems, excluding software. It addresses techniques and measures for fault and failure control, installation, commissioning, safety validation, operation, maintenance, and modifications of the systems. The second edition of EN 61508-2, published in 2010, is a technical revision that incorporates comments received during the review stages. It is considered a basic safety publication according to IEC Guide 104 and is relevant to the Smart Grid.
記事のタイトル：EN 61508-2:2010- 電気/電子/プログラム可能な電子安全関連システムの機能的安全性- 第2部：電気/電子/プログラム可能な電子安全関連システムの要件 記事の内容：IEC 61508-2:2010は、少なくとも1つの電気、電子またはプログラム可能な電子要素を含むすべての安全関連システムに適用されます。- E/E/PE安全関連システム内のすべての要素に適用されます。- IEC 61508-1によって開発されたE/E/PEシステムの安全要件仕様をE/E/PEシステムの設計要件仕様に詳細化する方法を指定します。- ソフトウェアはIEC 61508-3で取り扱われるため、E/E/PE安全関連システムの設計および製造に適用される活動の要件が指定されます。これらの要件には、故障および障害の回避および制御のための安全整合性レベルによって評価された技術と手段の適用が含まれています。- E/E/PE安全関連システムのインストール、起動、最終的な安全検証に必要な情報を指定します。- E/E/PE安全関連システムの運用および保守に必要な情報と手順の作成に対するユーザーの要件を指定します。- E/E/PE安全関連システムの修正を行う組織が満たすべき要件を指定します。この第2版は、1998年に発行された第1版を取り消し、改訂版としています。この版は、IECガイド104による基本的な安全出版物の地位を持っています。 新しい！IEC Standards+ 61508:2010も利用可能であり、すべての部分とコメント付きのレッドラインバージョンも含まれています。本2版での変更点は、世界的な専門家によって強調され、コメントが付けられています。 本出版物は、スマートグリッドに関連性が非常に高いです。
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