EN 61326-3-1:2017
(Main)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
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
NEW!IEC 61326-3-1:2017 is available as IEC 61326-3-1:2017 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 61326-3-1:2017 covers all equipment within the scope of IEC 61326-1, but is limited to systems and equipment for industrial applications intended to perform safety functions as defined in IEC 61508 with SIL 1-3. This second edition cancels and replaces the first edition published in 2008. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - extension of the frequency range up to 6 GHz for the radio-frequency electromagnetic field test according to IEC 61000-4-3, - replacement of the performance criterion FS with DS according to the generic standard IEC 61000-6-7, - adding Table 1 - Aspects to be considered during application of performance criterion DS, - including immunity tests for devices with current consumption > 16 A according to IEC 61000-4-34, - updating Table 8 - Frequency ranges of mobile transmitters and ISM equipment, - updating Figure A.1 and Figure 1 for better readability.
Elektrische Mess-, Steuer-, Regel- und Laborgeräte - EMV-Anforderungen - Teil 3-1: Störfestigkeitsanforderungen für sicherheitsbezogene Systeme und für Geräte, die für sicherheitsbezogene Funktionen vorgesehen sind (Funktionale Sicherheit) - Allgemeine industrielle Anwendungen
Matériel électrique de mesure, de commande et de laboratoire - Exigences relatives à la CEM - Partie 3-1: Exigences d'immunité pour les systèmes relatifs à la sécurité et pour les matériels destinés à réaliser des fonctions relatives à la sécurité (sécurité fonctionnelle) - Applications industrielles générales
NEW!IEC 61326-3-1:2017 est disponible sous forme de IEC 61326-3-1:2017 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.L’IEC 61326-3-1:2017 couvre tous les matériels qui relèvent du domaine d’application de l’IEC 61326-1, mais est limitée aux systèmes et matériels pour applications industrielles destinés à réaliser des fonctions de sécurité telles que définies dans l’IEC 61508, avec un niveau d’intégrité de sécurité (SIL) 1-3. Cette deuxième édition annule et remplace la première édition parue en 2008. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: - extension de la plage de fréquences jusqu’à 6 GHz pour l’essai de champ électromagnétique à fréquences radioélectriques, conformément à l’IEC 61000-4-3, - remplacement du critère de performance FS par DS, conformément à la norme générique IEC 61000-6-7, - ajout du Tableau 1 – aspects à prendre en considération lors de l'application du critère de performance DS, - intégration d’essais d’immunité pour les dispositifs ayant une consommation de courant > 16 A, conformément à l’IEC 61000-4-34, - mise à jour du Tableau 8 - Plages de fréquences des émetteurs mobiles et des matériels ISM, - mise à jour de la Figure A.1 et de la Figure 1 pour une meilleure lisibilité.
Električna oprema za merjenje, nadzor in laboratorijsko uporabo - Zahteve elektromagnetne združljivosti (EMC) - 3-1. del: Zahteve za odpornost sistemov, povezanih z varnostjo, in opreme, namenjene za opravljanje funkcij, povezanih z varnostjo (funkcijska varnost) - Splošna industrijska uporaba (IEC 61326-3-1:2017)
Ta del standarda IEC 61326 zajema vso opremo, ki sodi na področje uporabe standarda IEC 61326-1, vendar se omejuje na sisteme in opremo za industrijsko uporabo, ki so namenjeni izvajanju varnostnih funkcij, kot je opredeljeno v standardu IEC 61508, z ravnjo celovite varnosti 1-3.
Elektromagnetna okolja, ki so zajeta v tem standardu za skupino proizvodov, so industrijska okolja, tako notranja kot zunanja, kot je opisano za industrijske lokacije v standardu IEC 61000-6-2 ali opredeljeno v točki 3.8 standarda IEC 61326-1. Oprema in sistemi, namenjeni za uporabo v drugih elektromagnetnih okoljih, na primer v procesni industriji, ali v okoljih s potencialno eksplozivnimi atmosferami, ne spadajo na področje uporabe tega dokumenta.
Oprema in sistemi, ki so obravnavani kot »dokazani z uporabo« v skladu s standardom IEC 61508 ali kot »pred uporabo« v skladu s standardom IEC 61511, ne spadajo na področje uporabe tega dokumenta.
Sistemi za javljanje požara in varnostni alarmni sistemi, namenjeni za zaščito stavb, ne spadajo na področje uporabe tega dokumenta.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2017
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SIST EN 61326-3-1:2008
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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 61326-3-1:2017)
Elektrische Mess-, Steuer-, Regel- und Laborgeräte - EMV-Anforderungen - Teil 3-1:
Störfestigkeitsanforderungen für sicherheitsbezogene Systeme und für Geräte, die für
sicherheitsbezogene Funktionen vorgesehen sind (Funktionale Sicherheit) - Allgemeine
industrielle Anwendungen (IEC 61326-3-1:2017)
Matériel électrique de mesure, de commande et de laboratoire - Exigences relatives à la
CEM - Partie 3-1: Exigences d'immunité pour les systèmes relatifs à la sécurité et pour
les matériels destinés à réaliser des fonctions relatives à la sécurité (sécurité
fonctionnelle) - Applications industrielles générales (IEC 61326-3-1:2017)
Ta slovenski standard je istoveten z: EN 61326-3-1:2017
ICS:
25.040.40 Merjenje in krmiljenje Industrial process
industrijskih postopkov measurement and control
33.100.20 Imunost Immunity
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN 61326-3-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2017
ICS 25.040.40; 33.100.20 Supersedes EN 61326-3-1:2008
English Version
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 61326-3-1:2017)
Matériel électrique de mesure, de commande et de Elektrische Mess-, Steuer-, Regel- und Laborgeräte - EMV-
laboratoire - Exigences relatives à la CEM - Partie 3-1: Anforderungen - Teil 3-1: Störfestigkeitsanforderungen für
Exigences d'immunité pour les systèmes relatifs à la sicherheitsbezogene Systeme und für Geräte, die für
sécurité et pour les matériels destinés à réaliser des sicherheitsbezogene Funktionen vorgesehen sind
fonctions relatives à la sécurité (sécurité fonctionnelle) - (Funktionale Sicherheit) - Allgemeine industrielle
Applications industrielles générales Anwendungen
(IEC 61326-3-1:2017) (IEC 61326-3-1:2017)
This European Standard was approved by CENELEC on 2017-06-20. 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 CEN-CENELEC
Management Centre 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 CEN-CENELEC Management Centre 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 61326-3-1:2017 E
European foreword
The text of document 65A/819/FDIS, future edition 2 of IEC 61326-3-1, 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 approved by CENELEC as EN 61326-3-1:2017.
The following dates are fixed:
(dop) 2018-03-20
• latest date by which the document has to be implemented at
national level by publication of an identical national
standard or by endorsement
• latest date by which the national standards conflicting with (dow) 2020-06-20
the document have to be withdrawn
This document supersedes EN 61326-3-1:2008.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard IEC 61326-3-1:2017 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:
IEC 60204-1:2005 NOTE Harmonized as EN 60204-1:2006.
IEC 61000 (series) NOTE Harmonized as EN 61000 (series).
IEC 61000-1-2:2005 NOTE Harmonized as EN 60204-1:2006.
IEC 61000-6-5 NOTE Harmonized as EN 61000-6-5.
IEC 61000-6-7 NOTE Harmonized as EN 61000-6-7.
IEC 61326-2-1:2012 NOTE Harmonized as EN 61326-2-1:2013.
IEC 61326-2-2:2012 NOTE Harmonized as EN 61326-2-2:2013.
IEC 61326-2-3:2012 NOTE Harmonized as EN 61326-2-3:2013.
IEC 61326-2-4:2012 NOTE Harmonized as EN 61326-2-4:2013.
IEC 61326-2-5:2012 NOTE Harmonized as EN 61326-2-5:2013.
IEC 61326-3-1:2008 NOTE Harmonized as EN 61326-3-1:2008.
IEC 61508 (series) NOTE Harmonized as EN 61508 (series).
IEC 61508-1:2010 NOTE Harmonized as EN 61508-1:2010.
IEC 61508-4:2010 NOTE Harmonized as EN 61508-4:2010.
IEC 61511 (series) NOTE Harmonized as EN 61511 (series).
IEC 61784-3 NOTE Harmonized as EN 61784-3.
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60050-161 - International Electrotechnical Vocabulary - -
(IEV) -- Chapter 161: Electromagnetic
compatibility
IEC 61000-4-2 2008 Electromagnetic compatibility (EMC) -- PartE N 61000-4-2 2009
4-2: Testing and measurement techniques
- Electrostatic discharge immunity test
IEC 61000-4-3 2006 Electromagnetic compatibility (EMC) -- PartE N 61000-4-3 2006
4-3: Testing and measurement techniques
- Radiated, radio-frequency,
electromagnetic field immunity test
+ A1 2007 + A1 2008
+ A2 2010 + A2 2010
IEC 61000-4-4 2012 Electromagnetic compatibility (EMC) -- PartE N 61000-4-4 2012
4-4: Testing and measurement techniques
- Electrical fast transient/burst immunity
test
IEC 61000-4-5 2014 Electromagnetic compatibility (EMC) - PartEN 61000-4-5 2014
4-5: Testing and measurement techniques
- Surge immunity test
IEC 61000-4-6 2013 Electromagnetic compatibility (EMC) -- PartE N 61000-4-6 2014
4-6: Testing and measurement techniques
- Immunity to conducted disturbances,
induced by radio-frequency fields
IEC 61000-4-8 2009 Electromagnetic compatibility (EMC) -- PartE N 61000-4-8 2010
4-8: Testing and measurement techniques
- Power frequency magnetic field immunity
test
IEC 61000-4-11 2004 Electromagnetic compatibility (EMC) -- PartE N 61000-4-11 2004
4-11: Testing and measurement
techniques - Voltage dips, short
interruptions and voltage variations
immunity tests
IEC 61000-4-16 2015 Electromagnetic compatibility (EMC) - PartE N 61000-4-16 2016
4-16: Testing and measurement
techniques - Test for immunity to
conducted, common mode disturbances in
the frequency range 0 Hz to 150 kHz
IEC 61000-4-29 2000 Electromagnetic compatibility (EMC) -- PartE N 61000-4-29 2000
4-29: Testing and measurement
techniques - Voltage dips, short
interruptions and voltage variations on d.c.
input power port immunity tests
IEC 61000-4-34 2005 Electromagnetic compatibility (EMC) -- PartE N 61000-4-34 2007
4-34: Testing and measurement
techniques - Voltage dips, short
interruptions and voltage variations
immunity tests for equipment with input
current more than 16 A per phase
+ A1 2009 + A1 2009
IEC 61000-6-2 2016 Electromagnetic compatibility (EMC) - PartE N 61000-6-2 2017
6-2: Generic standards - Immunity
standard for industrial environments
IEC 61326-1 2012 Electrical equipment for measurement, EN 61326-1 2013
control and laboratory use - EMC
requirements -- Part 1: General
requirements
IEC 61326-3-2 - - -
IEC 61508-2 2010 Functional safety of EN 61508-2 2010
electrical/electronic/programmable
electronic safety-related systems -- Part 2:
Requirements for
electrical/electronic/programmable
electronic safety-related systems
IEC 61326-3-1 ®
Edition 2.0 2017-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
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
Matériel électrique de mesure, de commande et de laboratoire – Exigences
relatives à la CEM –
Partie 3-1: Exigences d'immunité pour les systèmes relatifs à la sécurité et
pour les matériels destinés à réaliser des fonctions relatives à la sécurité
(sécurité fonctionnelle) – Applications industrielles générales
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.040.40; 33.100.20 ISBN 978-2-8322-4212-4
– 2 – IEC 61326-3-1:2017 © IEC 2017
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 8
2 Normative references . 8
3 Terms, definitions and abbreviations . 9
3.1 Terms and definitions . 9
3.2 Abbreviations . 12
4 General . 13
5 EMC test plan . 13
5.1 General . 13
5.2 Instruction for testing . 13
5.3 Configuration of EUT during testing . 14
5.3.1 General . 14
5.3.2 Composition of EUT . 14
5.3.3 Assembly of EUT . 14
5.3.4 I/O ports . 14
5.3.5 Auxiliary equipment (AE) . 14
5.3.6 Cabling and earthing (grounding) . 14
5.4 Operation conditions of EUT during testing . 14
5.4.1 Operation modes . 14
5.4.2 Environmental conditions . 15
5.4.3 EUT software during test . 15
5.5 Specification of performance criteria . 15
5.6 Test description . 15
6 Performance criteria . 15
6.1 Performance criterion DS . 15
6.2 Application of the performance criterion DS . 16
6.3 Aspects to be considered during application of performance criterion DS . 16
7 Immunity requirements . 17
8 Test set-up and test philosophy for EUTs with functions intended for safety
applications . 22
8.1 Testing of safety-related systems and equipment intended to be used in
safety-related systems . 22
8.2 Test philosophy for equipment intended for use in safety-related systems . 22
8.3 Test philosophy for safety-related systems . 23
8.4 Test configuration and test performance . 23
8.5 Monitoring . 24
9 Test results and test report . 24
Annex A (informative) Approaches on how to apply IEC 61326-3 series . 27
Annex B (informative) Evaluation of electromagnetic phenomena . 30
Annex C (informative) Allowed effects during immunity tests . 34
Bibliography . 39
Figure 1 – Typical test set-up for equipment intended for use in safety-related system,
tested as stand-alone equipment or entire system . 25
IEC 61326-3-1:2017 © IEC 2017 – 3 –
Figure 2 – Typical test set-up for equipment intended for use in a safety-related system
integrated into a representative safety-related system during test . 26
Figure A.1 – Correlation between the standards IEC 61326-1, IEC 61326-2-x,
IEC 61326-3-1 and IEC 61326-3-2 . 29
Figure B.1 – Emission/immunity levels and compatibility level, with an example of
emission/immunity levels for a single emitter and susceptor, as a function of some
independent variables (see IEC TR 61000-1-1) . 31
Table 1 – Reaction of EUT during test . 16
Table 2 – Immunity test requirements – Enclosure port . 17
Table 3 – Immunity test requirements – Input and output AC power ports . 18
Table 4 – Immunity test requirements – Input and output DC power ports . 19
Table 5 – Immunity test requirements – I/O signal/control ports . 19
Table 6 – Immunity test requirements – I/O signal/control ports connected direct to
power supply networks. 20
Table 7 – Immunity test requirements – Functional earth port . 20
Table 8 – Frequency ranges of mobile transmitters and ISM equipment for tests with
electromagnetic fields . 21
Table 9 – Frequency ranges of mobile transmitters and ISM equipment for the
conducted RF tests . 22
Table 10 – Applicable performance criteria and observed behaviour during test for
equipment intended for use in safety-related systems . 23
Table B.1 – Exemplary considerations on electromagnetic phenomena and test levels
with regard to functional safety in industrial applications . 33
Table C.1 – Allowed effects during immunity tests on functions of equipment . 35
Table C.2 – Allowed effects during immunity tests on functions of a system . 37
– 4 – IEC 61326-3-1:2017 © IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
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
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-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
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 61326-3-1 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 2008. This edition
constitutes a technical revision. This edition includes the following significant technical
changes with respect to the previous edition:
• extension of the frequency range up to 6 GHz for the radio-frequency electromagnetic field
test according to IEC 61000-4-3,
• replacement of the performance criterion FS with DS according to the generic standard
IEC 61000-6-7,
• adding Table 1 – Aspects to be considered during application of performance criterion DS,
IEC 61326-3-1:2017 © IEC 2017 – 5 –
• including immunity tests for devices with current consumption > 16 A according to
IEC 61000-4-34,
• updating Table 8 – Frequency ranges of mobile transmitters and ISM equipment,
• updating Figure A.1 and Figure 1 for better readability.
IEC 61326-3-1 is to be read in conjunction with IEC 61326-1.
The text of this standard is based on the following documents:
FDIS Report on voting
65A/819/FDIS 65A/825/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 the parts of the IEC 61326 series, under the general title Electrical equipment for
measurement, control and laboratory use – EMC requirements, can be found on the IEC
website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website 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.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
– 6 – IEC 61326-3-1:2017 © IEC 2017
INTRODUCTION
Functional safety is that part of the overall safety relating to the equipment under control
(EUC) and the EUC control system which depends on the correct functioning of the electrical
safety-related systems. To achieve this, all items of equipment of the safety-related system
which are involved in the performance of the safety functions must behave in a specified
manner under all relevant conditions.
The IEC basic safety publication for functional safety of electrical/electronic/programmable
electronic safety-related systems is IEC 61508. It sets the overall requirements to achieve
functional safety. Sufficient immunity to electromagnetic disturbances is one of those
requirements.
The concept of IEC 61508 distinguishes between the consideration of the application and the
design of safety-related electrical and electronic systems. The overall safety requirements
specification specifies all relevant requirements of the intended application, as follows:
a) definition of the safety functions, based on a risk assessment of the intended application
(which functions are intended to reduce risk);
b) appropriate safety integrity level (SIL) for each safety-function based on a risk assessment
of the intended application;
c) definition of the environment in which the system is intended to work including the
electromagnetic environment as required by IEC 61508-2.
The requirements for each safety function are then specified in one or more system safety
requirements specifications (SSRS). Hence, with regard to immunity against electromagnetic
phenomena, the essential starting point is that the electromagnetic environment and its
phenomena are considered in the SSRS, as required by IEC 61508. The safety-related
system intended to implement the specified safety function has to fulfil the SSRS, and, from it,
corresponding immunity requirements have to be derived for the items of equipment, which
results in an equipment requirement specification. With respect to the electromagnetic
environment, the SSRS and the equipment requirement specification should be based on a
competent assessment of the foreseeable electromagnetic threats in the real environment
over the whole operational life of the equipment. Hence, immunity requirements for the
equipment depend on the characteristics of the electromagnetic environment in which the
equipment is intended to be used.
The equipment manufacturer, therefore, has to prove that the equipment fulfils the equipment
requirement specification and the system integrator must prove that the system fulfils the
SSRS. Evidence has to be produced by application of appropriate methods. They do not need
to consider any other aspects of the application, for example, risk of the application
associated to any failure of the safety-related system. The objective is for all equipment in the
system to comply with particular performance criteria taking into account functional safety
aspects (for example, the performance criterion DS) up to levels specified in the SSRS
independent of the required safety integrity level (SIL).
For approaches on how to apply IEC 61326-3 series, see Annex A.
There exists meanwhile the generic EMC standard IEC 61000-6-7 dealing with functional
safety aspects in industrial environments. Generic EMC standards are designed to apply for a
defined electromagnetic environment, to products for which no dedicated product family
EMC/product EMC standards exist. However, for the equipment in the scope of this document,
the information given in the generic EMC standard was considered not to be sufficient. More
detailed information and specifications were needed, for example specific test set-ups,
consideration of the functional earth port or the deliberate differentiation between types of
electromagnetic environments relevant for the equipment in the scope of this document.
IEC 61326-3-1:2017 © IEC 2017 – 7 –
Though historically this product standard was developed several years before the generic
nd
EMC standard, this 2 edition considers the information given in the generic EMC standard
and applies it where appropriate.
– 8 – IEC 61326-3-1:2017 © IEC 2017
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
1 Scope
This part of IEC 61326 covers all equipment within the scope of IEC 61326-1, but is limited to
systems and equipment for industrial applications intended to perform safety functions as
defined in IEC 61508 with SIL 1-3.
The electromagnetic environments encompassed by this product family standard are
industrial, both indoor and outdoor, as described for industrial locations in IEC 61000-6-2 or
defined in 3.8 of IEC 61326-1. Equipment and systems intended for use in other
electromagnetic environments, for example, in the process industry or in environments with
potentially explosive atmospheres, are excluded from the scope of this document.
Equipment and systems considered as “proven-in-use” according to IEC 61508 or “prior use”
according to IEC 61511 are excluded from the scope of this document.
Fire alarm systems and security alarm systems intended for protection of buildings are
excluded from the scope of this document.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements 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 60050-161, International Electrotechnical Vocabulary – Part 161: Electromagnetic
compatibility (available at
IEC 61000-4-2:2008, Electromagnetic compatibility (EMC) – Part 4-2: Testing and
measurement techniques – Electrostatic discharge immunity test
IEC 61000-4-3:2006, Electromagnetic compatibility (EMC) – Part 4-3: Testing and
measurement techniques – Radiated, radio-frequency, electromagnetic field immunity test
IEC 61000-4-3:2006/AMD1:2007
IEC 61000-4-3:2006/AMD2:2010
IEC 61000-4-4:2012, Electromagnetic compatibility (EMC) – Part 4-4: Testing and
measurement techniques – Electrical fast transient/burst immunity test
IEC 61000-4-5:2014, Electromagnetic compatibility (EMC) – Part 4-5: Testing and
measurement techniques – Surge immunity test
IEC 61000-4-6:2013, Electromagnetic compatibility (EMC) – Part 4-6: Testing and
measurement techniques – Immunity to conducted disturbances, induced by radio-frequency
fields
IEC 61326-3-1:2017 © IEC 2017 – 9 –
IEC 61000-4-8:2009, Electromagnetic compatibility (EMC) – Part 4-8: Testing and
measurement techniques – Power frequency magnetic field immunity test
IEC 61000-4-11:2004, Electromagnetic compatibility (EMC) – Part 4-11: Testing and
measurement techniques – Voltage dips, short interruptions and voltage variations immunity
tests
IEC 61000-4-16:2015, Electromagnetic compatibility (EMC) – Part 4-16: Testing and
measurement techniques – Test for immunity to conducted, common mode disturbances in
the frequency range 0 Hz to 150 kHz
IEC 61000-4-29:2000, Electromagnetic compatibility (EMC) – Part 4-29: Testing and
measurement techniques – Voltage dips, short interruptions and voltage variations on d.c.
input power port immunity tests
IEC 61000-4-34:2005, Electromagnetic compatibility (EMC) – Part 4-34: Testing and
measurement techniques – Voltage dips, short interruptions and voltage variations immunity
tests for equipment with input current more than 16 A per phase
IEC 61000-4-34:2005/AMD1:2009
IEC 61000-6-2:2016, Electromagnetic compatibility (EMC) – Part 6-2: Generic standards –
Immunity for industrial environments
IEC 61326-1:2012, Electrical equipment for measurement, control and laboratory use – EMC
requirements – Part 1: General requirements
IEC 61326-3-2:___ , Electrical equipment for measurement, control and laboratory use –
EMC requirements – Part 3-2: Immunity requirements for safety-related systems and for
equipment intended to perform safety-related functions (functional safety) – Industrial
applications with specified electromagnetic environment
IEC 61508-2:2010, Functional safety of electrical/electronic/programmable electronic safety-
related systems – Part 2: Requirements for electrical/electronic/programmable electronic
safety-related systems
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 61326-1 and
IEC 60050-161 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
NOTE Other definitions, not included in IEC 60050-161 and in this document, but nevertheless necessary for the
application of the different tests, are given in the EMC basic publications of the IEC 61000 series.
3.1.1
dangerous failure
failure of an element and/or subsystem and/or system that plays a part in implementing the
safety function that:
_____________
Under preparation. Stage at the time of publication: IEC/DIS 61326-3-2:2016.
– 10 – IEC 61326-3-1:2017 © IEC 2017
a) prevents a safety function from operating when required (demand mode) or causes a
safety function to fail (continuous mode) such that the EUC is put into a hazardous or
potentially hazardous state; or
b) decreases the probability that the safety function operates correctly when required
[SOURCE: IEC 61508-4:2010, 3.6.7]
3.1.2
equipment
subsystems, apparatus, appliances and other assemblies of products
3.1.3
equipment under control
EUC
equipment, machinery, apparatus or plant used for manufacturing, process, transportation,
medical or other activities
Note 1 to entry: The EUC control system is separate and distinct from the EUC.
[SOURCE: IEC 61508-4:2010, 3.2.1]
3.1.4
functional safety
part of the overall safety relating to the EUC and the EUC control system that depends on the
correct functioning of the E/E/PE safety-related systems and other risk reduction measures
[SOURCE: IEC 61508-4:2010, 3.1.12]
3.1.5
harm
physical injury or damage to the health of people, or damage to property or the environment
[SOURCE: ISO/IEC Guide 51:2014, 3.1, modified – "physical" has been added]
3.1.6
hazard
potential source of harm
Note 1 to entry: The term includes short-term or immediate danger (such as from fire or explosion) and long-term
effects on health (such as from release of a toxic substance).
[SOURCE: ISO/IEC Guide 51:2014, 3.2, modified – the note to entry has been added]
3.1.7
safe failure
failure of an element and/or subsystem and/or system that plays a part in implementing the
safety function that:
a) results in the spurious operation of the safety function to put the EUC (or part thereof) into
a safe state or maintain a safe state; or
b) increases the probability of the spurious operation of the safety function to put the EUC (or
part thereof) into a safe state or maintain a safe state
[SOURCE: IEC 61508-4:2010, 3.6.8]
IEC 61326-3-1:2017 © IEC 2017 – 11 –
3.1.8
safety function
function to be implemented by an E/E/PE safety-related system or other risk reduction
measures, that is intended to achieve or maintain a safe state for the EUC, in respect of a
specific hazardous event
EXAMPLE Examples of safety functions include:
– functions that are required to be carried out as positive actions to avoid hazardous situations (for example
switching off a motor); and
– functions that prevent actions being taken (for example preventing a motor starting).
[SOURCE: IEC 61508-4:2010, 3.5.1]
3.1.9
programmable electronic
PE
based on computer technology which may be comprised of hardware, software and of input
and/or output units
EXAMPLE The following are all programmable electronic devices:
– microprocessors;
– micro-controllers;
– programmable controllers;
– application specific integrated circuits (ASICs);
– programmable logic controllers (PLCs);
– other computer-based devices (for example, smart sensors, transmitters, actuators).
Note 1 to entry: This term covers microelectronic devices based on one or more central processing units (CPUs)
together with associated memories, etc.
[SOURCE: IEC 61508-4:2010, 3.2.12]
3.1.10
electrical/electronic/programmable electronic
E/E/PE
based on electrical (E) and/or electronic (E) and/or programmable electronic (PE) technology
EXAMPLE Electrical/electronic/programmable electronic devices include
– electro-mechanical devices (electrical);
– solid-state non-programmable electronic devices (electronic);
– electronic devices based on computer technology (programmable electronic); see 3.2.5
(of IEC 61326-1:2012).
Note 1 to entry: The term is intended to cover any and all devices or systems operating on electrical principles.
[SOURCE: IEC 61508-4:2010, 3.2.13, modified – the reference in the last dash is modified]
3.1.11
DC distribution network
local DC electricity supply network in the infrastructure of a certain site or building intended
for connection of any type of equipment
Note 1 to entry: Connection to a local or remote battery is not regarded as a DC distribution network if such a link
comprises the power supply for only a single piece of equipment.
3.1.12
safety-related system
designated system that both
– 12 – IEC 61326-3-1:2017 © IEC 2017
• implements the required safety functions necessary to achieve or maintain a safe state for
the EUC; and
• is intended to achieve, on its own or with other E/E/PE safety-related systems and other
risk reduction measures, the necessary safety integrity for the required safety functions
Note 1 to entry: A safety-related system includes all the hardware, software and supporting services (for example,
power supplies) necessary to carry out the specified safety function (sensors, other input devices, final elements
(actuators) and other output devices are therefore included in the safety-related system).
[SOURCE: IEC 61508-4:2010, 3.4.1, modified – notes 1, 2, 3, 4, 5 and 7 have been removed]
3.1.13
equipment under test
EUT
the equipment (devices, appliances and systems) subjected to immunity tests
3.1.14
auxiliary equipment
AE
equipment necessary to provide the equipment under test (EUT) with the signals required for
normal operation and equipment to verify the performance of the EUT
3.1.15
system safety requirements specification
SSRS
specification containing the requirements for the safety functions and their associated safety
integrity levels
3.1.16
safety integrity level
SIL
discrete level (one out of a possible four), corresponding to a range of safety integrity values,
where safety integrity level 4 has the highest level of safety integrity and safety integrity
level 1 has the lowest
Note 1 to entry: The target failure measures for the four safety integrity levels are specified in Tables 2 and 3 of
IEC 61508-1:2010.
Note 2 to entry: Safety integrity levels are used for specifying the safety integrity requirements of the safety
functions to be allocated to the E/E/PE safety-related systems.
Note 3 to entry: A safety integrity level (SIL) is not a property of a system, subsystem, element or component.
The correct interpretation of the phrase “SIL n safety-related system” (where n is 1, 2, 3 or 4) is that the system is
potentially capable of supporting safety functions with a safety integrity level up to n.
[SOURCE: IEC 61508-4:2010, 3.5.8, modified – the reference to 3.5.17 of IEC 61508-1 has
been removed and its date of publication added]
3.2 Abbreviations
AE auxiliary equipment
DS defined state
E/E/PE electrical/electronic/programmable electronic
EUC equipment under control
EUT equipment under test
ISM industrial, scientific and medical
PE protective earth
SIL safety integrity level
SSRS system safety requirements specification
IEC 61326-3-1:2017 © IEC 2017 – 13 –
4 General
In addition to the requirements in IEC 61326-1, this standard specifies requirements for
systems and equipment for industrial applications intended to perform safety functions
according to IEC 61508. These requirements do not apply to the non-safety-related functions
of the equipment or systems.
NOTE The overall design process and the necessary design features to achieve functional safety of electrical and
electronic systems are defined in IEC 61508. This includes requirements for design features that make the system
tolerant (IEC 61508-2:2010, 7.4.7.1) of electromagnetic disturbances.
The immunity requirements in IEC 61326-1 have been selected to ensure an adequate level of
immunity for equipment used in non-safety-related applications, but the required immunity
levels do not cover extreme cases that may occur at any location but with an extremely low
probability of occurrence.
Increased immunity test levels compared to IEC 61326-1 are defined as a systematic measure
intended to avoid dangerous failures caused by electromagnetic phenomena. Consequently, it
is not necessary to take into account the effect of electromagnetic phenomena in the
quantification of hardware safety integrity, for example, probability of failure on demand.
Increased immunity test levels are defined where necessary.
Increased immunity test levels are related to functional safety aspects only; they are not
applicable for the assessment of reliability and availability aspects. The increased immunity
test levels apply only to the safety-related functions having a specific performance criterion
for functional safety (performance criterion DS). The increased immunity test levels set the
limits for the maximum test values. Further tests with higher values are not required for
compliance with this standard.
5 EMC test plan
5.1 General
An EMC test plan shall be established prior to testing. It shall contain as a minimum the
elements given in 5.2 to 5.6.
If any tests are deemed unnecessary to
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