SIST EN 60079-27:2008
Explosive atmospheres -- Part 27: Fieldbus intrinsically safe concept (FISCO)
Explosive atmospheres -- Part 27: Fieldbus intrinsically safe concept (FISCO)
This part of IEC 60079 contains the details of apparatus, systems and installation practice for use with the Fieldbus Intrinsically Safe Concept (FISCO). It is based on the concepts of Manchester encoded, bus powered systems designed in accordance with IEC 61158-2 which is the physical layer standard for Fieldbus installations. The constructional and installation requirements of FISCO apparatus and systems are determined by IEC 60079-11, IEC 60079-14, and IEC 60079-25, except as modified by this standard. Part of a Fieldbus device may be protected by any of the methods of explosion protection listed in IEC 60079-0, appropriate to the zone of intended use. In these circumstances, the requirements of this standard apply only to that part of the apparatus directly connected to the intrinsically safe trunk or spurs.
Explosionsfähige Atmosphäre - Teil 27: Konzept für eigensichere Feldbussysteme (FISCO)
Atmosphères explosives -- Partie 27: Concept de réseau de terrain de sécurité intrinsèque (FISCO)
La présente partie de la CEI 60079 contient des précisions concernant les matériels, les systèmes et les méthodes d'installation pour une utilisation selon le concept de réseau de terrain de sécurité intrinsèque (FISCO). Elle est basée sur les concepts des systèmes d'alimentation en réseau codés en Manchester conçus selon la CEI 61158-2 qui est la norme de la couche physique pour les installations de réseau de terrain. Les modifications principales par rapport à l'édition précédente sont que dans cette norme les exigences FNICO sont remplacées par les exigences d'un système FISCO 'ic'.
Eksplozivne atmosfere - 27. del: Zasnova lastnovarnega procesnega vodila (FISCO) (IEC 60079-27:2008)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 60079-27:2008
01-september-2008
1DGRPHãþD
SIST EN 60079-27:2006
Eksplozivne atmosfere - 27. del: Zasnova lastnovarnega procesnega vodila
(FISCO) (IEC 60079-27:2008)
Explosive atmospheres - Part 27: Fieldbus intrinsically safe concept (FISCO)
Explosionsfähige Atmosphäre - Teil 27: Konzept für eigensichere Feldbussysteme
(FISCO)
Atmospheres explosives - Partie 27: Concept de réseau de terrain de sécurité
intrinseque (FISCO)
Ta slovenski standard je istoveten z: EN 60079-27:2008
ICS:
29.260.20 (OHNWULþQLDSDUDWL]D Electrical apparatus for
HNVSOR]LYQDR]UDþMD explosive atmospheres
SIST EN 60079-27:2008 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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EUROPEAN STANDARD
EN 60079-27
NORME EUROPÉENNE
May 2008
EUROPÄISCHE NORM
ICS 29.260.20 Supersedes EN 60079-27:2006
English version
Explosive atmospheres -
Part 27: Fieldbus intrinsically safe concept (FISCO)
(IEC 60079-27:2008)
Atmosphères explosives - Explosionsfähige Atmosphäre -
Partie 27: Concept de réseau de terrain Teil 27: Konzept für eigensichere
de sécurité intrinsèque (FISCO) Feldbussysteme (FISCO)
(CEI 60079-27:2008) (IEC 60079-27:2008)
This European Standard was approved by CENELEC on 2008-04-01. 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, 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
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60079-27:2008 E
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EN 60079-27:2008 - 2 -
Foreword
The text of document 31G/169/CDV, future edition 2 of IEC 60079-27, prepared by SC 31G,
Intrinsically-safe apparatus, of IEC TC 31, Equipment for explosive atmospheres, was submitted to the
IEC-CENELEC Parallel Unique Acceptance Procedure and was approved by CENELEC as EN 60079-27
on 2008-04-01.
This European Standard supersedes EN 60079-27:2006.
The significant change with respect to EN 60079-27:2006 is that EN 60079-27:2008 replaces the FNICO
requirements with the requirements of an “ic” FISCO system.
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) 2009-01-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2011-04-01
This European Standard has been prepared under a mandate given to CENELEC by the European
Commission and the European Free Trade Association and covers essential requirements of
EC Directive (94/9/EC). See Annex ZZ.
Annexes ZA and ZZ have been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60079-27:2008 was approved by CENELEC as a European
Standard without any modification.
__________
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- 3 - EN 60079-27:2008
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
1) 2)
IEC 60079-0 (mod) - Explosive atmospheres - EN 60079-0 2006
Part 0: Equipment - General requirements
1) 2)
IEC 60079-11 - Explosive atmospheres - EN 60079-11 2007
Part 11: Equipment protection by intrinsic
safety "i"
1) 2)
IEC 60079-14 - Electrical apparatus for explosive gas EN 60079-14 2003
atmospheres -
Part 14: Electrical installations in hazardous
areas (other than mines)
1) 2)
IEC 60079-15 - Electrical apparatus for explosive gas EN 60079-15 2005
atmospheres -
Part 15: Construction, test and marking of
type of protection "n" electrical apparatus
1) 2)
IEC 60079-25 - Electrical apparatus for explosive gas EN 60079-25 2004
atmospheres - + corr. April 2006
Part 25: Intrinsically safe systems
1) 2)
IEC 61158-2 - Industrial communication networks - EN 61158-2 2008
Fieldbus specifications -
Part 2: Physical layer specification and service
definition
1)
Undated reference.
2)
Valid edition at date of issue.
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EN 60079-27:2008 - 4 -
Annex ZZ
(informative)
Coverage of Essential Requirements of EC Directives
This European Standard has been prepared under a mandate given to CENELEC by the European
Commission and the European Free Trade Association and within its scope the standard covers only the
following essential requirements out of those given in Annex II of the EC Directive 94/9/EC:
– ER 1.0.1, ER 1.0.2, ER 1.0.3, ER 1.0.4, ER 1.0.5 (partly)
– ER 1.1
– ER 1.2.1, ER 1.2.2, ER 1.2.4 (partly), ER 1.2.6, ER 1.2.7 (partly)
– ER 1.3.1, ER 1.3.2
– ER 1.4.1
– ER 2.0.1, ER 2.0.2
– ER 2.1.1, ER 2.2.1
Compliance with this standard provides one means of conformity with the specified essential
requirements of the Directive concerned.
WARNING: Other requirements and other EC Directives may be applicable to the products falling within
the scope of this standard.
___________
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IEC 60079-27
Edition 2.0 2008-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Explosive atmospheres –
Part 27: Fieldbus intrinsically safe concept (FISCO)
Atmosphères explosives –
Partie 27: Concept de réseau de terrain de sécurité intrinsèque (FISCO)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
M
CODE PRIX
ICS 29.260.20 ISBN 2-8318-9539-1
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– 2 – 60079-27 © IEC:2008
CONTENTS
FOREWORD.3
1 Scope.5
2 Normative references .5
3 Terms, definitions and abbreviations .6
3.1 Terms and definitions .6
3.2 Abbreviations .6
4 Apparatus requirements .6
4.1 General .6
4.2 FISCO power supplies.6
4.2.1 General .6
4.2.2 Additional requirements of “ia” and “ib” FISCO power supplies .6
4.2.3 Additional requirements of “ic” FISCO power supplies .7
4.3 FISCO field devices.7
4.3.1 General .7
4.3.2 Additional requirements of “ia” and “ib” FISCO field devices .8
4.3.3 Additional requirement of “ic” FISCO field devices .8
4.4 Terminator.8
4.5 Simple apparatus .8
4.6 Marking .9
4.7 Examples of marking .9
5 System requirements.10
5.1 General .10
5.2 Additional requirements of “ic” FISCO systems.11
Annex A (informative) Typical system .12
Bibliography.13
Figure A.1 – Typical system.12
Table 1 – Assessment of maximum output current for use with “ia” and “ib” FISCO
rectangular supplies.7
Table 2 – Assessment of maximum output current for use with “ic” FISCO rectangular
supplies .7
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60079-27 © IEC:2008 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
EXPLOSIVE ATMOSPHERES –
Part 27: Fieldbus intrinsically safe concept (FISCO)
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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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 60079-27 has been prepared by subcommittee 31G: Intrinsically-
safe apparatus, of IEC technical committee 31: Equipment for explosive atmospheres.
This second edition cancels and replaces the first edition issued in 2005. It constitutes a
technical revision.
The significant change with respect to the first edition is that this standard replaces the
FNICO requirements with the requirements of an “ic” FISCO system.
The text of this standard is based on the following documents:
CDV Report on voting
31G/169/CDV 31G/176A/RVC
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
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– 4 – 60079-27 © IEC:2008
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of the IEC 60079 series, under the general title: Explosives atmospheres 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.
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60079-27 © IEC:2008 – 5 –
EXPLOSIVE ATMOSPHERES –
Part 27: Fieldbus intrinsically safe concept (FISCO)
1 Scope
This part of IEC 60079 contains the details of apparatus, systems and installation practice for
use with the Fieldbus Intrinsically Safe Concept (FISCO). It is based on the concepts of
Manchester encoded, bus powered systems designed in accordance with IEC 61158-2 which
is the physical layer standard for Fieldbus installations.
The constructional and installation requirements of FISCO apparatus and systems are
determined by IEC 60079-11, IEC 60079-14, and IEC 60079-25, except as modified by this
standard. Part of
...
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