EN 61500:2011

SLOVENSKI STANDARD
01-oktober-2011
Jedrske elektrarne - Merilna in nadzorna oprema za zagotavljanje varnosti -
Podatkovne komunikacije v sistemih, ki izvajajo funkcije A
Nuclear power plants - Instrumentation and control systems important to safety - Data
communication in systems performing A functions
Kernkraftwerke - Leittechnik mit sicherheitstechnischer Bedeutung -
Datenkommunikation in Systemen, die Kategorie-A-Funktionen ausführen
Centrales nucléaires de puissance - Instrumentation et systèmes contrôle-commande
importants pour la sûreté - Communication de données dans les systèmes réalisant des
fonctions de catégorie A
Ta slovenski standard je istoveten z: EN 61500:2011
ICS:
27.120.20 Jedrske elektrarne. Varnost Nuclear power plants. Safety
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 61500
NORME EUROPÉENNE
August 2011
EUROPÄISCHE NORM
ICS 27.120.20
English version
Nuclear power plants -
Instrumentation and control important to safety -
Data communication in systems performing category A functions
(IEC 61500:2009)
Centrales nucléaires de puissance -  Kernkraftwerke -
Instrumentation et contrôle-commande Leittechnik mit sicherheitstechnischer
importants pour la sûreté - Bedeutung -
Communication de données dans les Datenkommunikation in Systemen, die
systèmes réalisant des fonctions de Kategorie-A-Funktionen ausführen
catégorie A (IEC 61500:2009)
(CEI 61500:2009)
This European Standard was approved by CENELEC on 2011-08-08. 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

© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61500:2011 E
Foreword
The text of the International Standard IEC 61500:2009, prepared by SC 45A, Instrumentation and control
of nuclear facilities, of IEC TC 45, Nuclear instrumentation, was submitted to the formal vote and was
approved by CENELEC as EN 61500 on 2011-08-08 without any modification.
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
(dop) 2012-08-08
national standard or by endorsement
– latest date by which the national standards conflicting
(dow) 2014-08-08
with the EN have to be withdrawn
As stated in the nuclear safety directive 2009/71/EURATOM, Chapter 1, Article 2, item 2, Member States
are not prevented from taking more stringent safety measures in the subject-matter covered by the
Directive, in compliance with Community law.

In a similar manner, this European standard does not prevent Member States from taking more stringent
nuclear safety measures in the subject-matter covered by this standard.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61500:2009 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 60068 series NOTE  Harmonized in EN 60068 series (not modified).
IEC 60721 series NOTE  Harmonized in EN 60721 series (not modified).
IEC 60964 NOTE  Harmonized as EN 60964.
IEC 60965 NOTE  Harmonized as EN 60965.
IEC 61158-3-19 NOTE  Harmonized as EN 61158-3-19.
IEC 61508-1 NOTE  Harmonized as EN 61508-1.
IEC 61508-2 NOTE  Harmonized as EN 61508-2.
IEC 61508-3 NOTE  Harmonized as EN 61508-3.
IEC 61508-4 NOTE  Harmonized as EN 61508-4.
IEC 61784-3 NOTE  Harmonized as EN 61784-3.
IEC 62138 NOTE  Harmonized as EN 62138.
__________
- 3 - EN 61500:2011
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

IEC 60709 - Nuclear power plants - Instrumentation and EN 60709 -
control systems important to safety -
Separation
IEC 60780 1998 Nuclear power plants - Electrical equipment - -
of the safety system - Qualification

IEC 60880 2006 Nuclear power plants - Instrumentation and EN 60880 2009
control systems important to safety - Software
aspects for computer-based systems
performing category A functions

IEC 60980 - Recommended practices for seismic - -
qualification of electrical equipment of the
safety system for nuclear generating stations

IEC 60987 (mod) 2007 Nuclear power plants - Instrumentation and EN 60987 2009
control important to safety - Hardware design
requirements for computer-based systems

IEC 61000 Series Electromagnetic compatibility (EMC) EN 61000 Series

IEC 61226 - Nuclear power plants - Instrumentation and EN 61226 -
control important to safety - Classification of
instrumentation and control functions

IEC 61513 - Nuclear power plants - Instrumentation and - -
control for systems important to safety -
General requirements for systems

IEC 62340 2007 Nuclear power plants - Instrumentation and EN 62340 2010
control systems important to safety -
Requirements for coping with common cause
failure (CCF)
IAEA Safety guide 2002 Instrumentation and control systems important - -
NS-G-1.3 to safety in nuclear power plants

IEC 61500 ®
Edition 2.0 2009-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Nuclear power plants – Instrumentation and control important to safety – Data
communication in systems performing category A functions

Centrales nucléaires de puissance – Instrumentation et contrôle-commande
importants pour la sûreté – Communication de données dans les systèmes
réalisant des fonctions de catégorie A

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
P
CODE PRIX
ICS 27.120.20 ISBN 978-2-88910-523-6
– 2 – 61500 © IEC:2009
CONTENTS
FOREWORD.3
INTRODUCTION.5
1 Scope.7
2 Normative references .7
3 Terms and definitions .8
4 Symbols and abbreviations.9
5 General requirements .9
5.1 Principles of selection of data communication techniques and equipment.9
5.2 Functional requirements .9
5.3 Performance requirements .10
5.4 Failure detection .10
5.5 Communication within division.10
5.6 Interfaces to systems of lower importance to safety.10
6 Physical separation and isolation.11
6.1 Electrical isolation .11
6.2 Physical separation .11
7 Functional independence.11
8 Reliability .12
8.1 Self-supervision and failure mitigation .12
8.1.1 Communication error detection .12
8.1.2 Response to failure .12
8.2 Test.12
8.3 Prevention of failures (including CCF) .13
9 Qualification .13
10 Maintenance and modification .14
Bibliography.15

61500 © IEC:2009 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
NUCLEAR POWER PLANTS –
INSTRUMENTATION AND CONTROL IMPORTANT TO SAFETY –
DATA COMMUNICATION IN SYSTEMS PERFORMING
CATEGORY A FUNCTIONS
FOREWORD
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