SIST EN 60793-2-40:2004

EUROPEAN STANDARD EN 60793-2-40
NORME EUROPÉENNE
EUROPÄISCHE NORM April 2002
ICS 33.180.10
English version
Optical fibres
Part 2-40: Product specifications –
Sectional specification for category A4 multimode fibres
(IEC 60793-2-40:2002)
Fibres optiques Lichtwellenleiter
Partie 2-40: Spécifications de produits - Teil 2-40: Produktspezifikationen -
Spécification intermédiaire pour les fibres Rahmenspezifikation für
multimodales de catégorie A4 Mehrmodenfasern der Kategorie A4
(CEI 60793-2-40:2002) (IEC 60793-2-40:2002)
This European Standard was approved by CENELEC on 2002-03-05. 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, Czech Republic,
Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands,
Norway, Portugal, Spain, Sweden, Switzerland and 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
© 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60793-2-40:2002 E

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EN 60793-2-40:2002 - 2 -
Foreword
The text of document 86A/737/FDIS, future edition 1 of IEC 60793-2-40, prepared by SC 86A, Fibres
and cables, of IEC TC 86, Fibre optics, was submitted to the IEC-CENELEC parallel vote and was
approved by CENELEC as EN 60793-2-40 on 2002-03-05.
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) 2002-12-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2005-03-01
Annexes designated "normative" are part of the body of the standard.
In this standard, annexes A, B, C, D and ZA are normative.
Annex ZA has been added by CENELEC.
Compared to IEC 60793-1:1989 and IEC 60793-2:1992, IEC/SC 86A has adopted a revised structure
of the new IEC 60793 series: The individual measurement methods and test procedures for optical
fibres are published as "Part 1-XX"; the product standards are published as "Part 2-XX".
The general relationship between the new series of EN 60793 and the superseded European
Standards of the EN 188000 series is as follows:
EN Title supersedes
EN 60793-1-XX Optical fibres -- Part 1-XX: Measurement methods Individual subclauses of
and test procedures EN 188000:1992
EN 188100:1995
EN 60793-2-XX Optical fibres -- Part 2-XX: Product specifications
EN 188101:1995
EN 188102:1995
EN 188200:1995
EN 188201:1995
EN 188202:1995
__________
Endorsement notice
The text of the International Standard IEC 60793-2-40:2002 was approved by CENELEC as a
European Standard without any modification.
__________

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- 3 - EN 60793-2-40:2002
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of any
of these publications apply to this European Standard only when incorporated in it by amendment or
revision. For undated references the latest edition of the publication referred to applies (including
amendments).
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 60068-1 - Environmental testing EN 60068-1 1994
Part 1: General and guidance
IEC 60793-1 Series Optical fibres EN 60793-1 Series
Part 1: Generic specification
IEC 60793-1-20 2001 Part 1-20: Measurement methods and EN 60793-1-20 2002
test procedures - Fibre geometry
IEC 60793-1-21 2001 Part 1-21: Measurement methods and EN 60793-1-21 2002
test procedures - Coating geometry
IEC 60793-1-22 2001 Part 1-22: Measurement methods and EN 60793-1-22 2002
test procedures - Length measurement
3)
IEC 60793-1-40 2001 Part 1-40: Measurement methods and EN 60793-1-40 -
test procedures - Attenuation
IEC 60793-1-41 2001 Part 1-41: Measurement methods and EN 60793-1-41 2002
test procedures - Bandwidth
IEC 60793-1-46 2001 Part 1-46: Measurement methods and EN 60973-1-46 2002
test procedures - Monitoring of changes
in optical transmittance
IEC 60793-1-50 2001 Part 1-50: Measurement methods and EN 60793-1-50 2002
test procedures - Damp heat (steady
state)
IEC 60793-1-51 2001 Part 1-51: Measurement methods and EN 60793-1-51 2002
test procedures - Dry heat

1)
Undated reference.
2)
Valid edition at date of issue.
3)
To be published.

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EN 60793-2-40:2002 - 4 -
Publication Year Title EN/HD Year
IEC 60793-1-52 2001 Part 1-52: Measurement methods and EN 60793-1-52 2002
test procedures - Change of
temperature
IEC 60793-1-53 2001 Part 1-53: Measurement methods and EN 60793-1-53 2002
test procedures - Water immersion
4)
IEC 60793-2 - Part 2: Product specifications - General - -
1) 2)
IEC 60794-1-1 - Optical fibre cables EN 60794-1-1 2002
Part 1-1: Generic specification -General
1) 2)
IEC 60794-1-2 - Part 1-2: Generic specification - Basic EN 60794-1-2 1999
optical cable test procedures

4)
Under consideration.

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NORME CEI
INTERNATIONALE IEC
60793-2-40
INTERNATIONAL
Première édition
STANDARD
First edition
2002-01
Fibres optiques –
Partie 2-40:
Spécifications de produits –
Spécification intermédiaire pour les fibres
multimodales de catégorie A4
Optical fibres –
Part 2-40:
Product specifications –
Sectional specification for category A4
multimode fibres
© IEC 2002 Droits de reproduction réservés ⎯ Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun procédé, any form or by any means, electronic or mechanical,
électronique ou mécanique, y compris la photocopie et les including photocopying and microfilm, without permission in
microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http://www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale
R
PRICE CODE
International Electrotechnical Commission
Pour prix, voir catalogue en vigueur
For price, see current catalogue

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60793-2-40 © IEC:2002 – 3 –
CONTENTS
FOREWORD.5
1 Scope and object.9
2 Normative references .9
3 Specifications .11
3.1 Dimensional requirements .11
3.2 Mechanical requirements.13
3.2.1 Tensile performance measurement.13
3.2.2 Torsion test measurement .15
3.2.3 Buffered fibre bend test measurement .15
3.2.4 Repeated bending test measurement.17
3.2.5 Crush test measurement.17
3.2.6 Impact test measurement .19
3.3 Transmission requirements.19
3.4 Environmental requirements .21
Annex A (normative)  Family specifications for A4a multimode fibres .23
Annex B (normative) Family specifications for A4b multimode fibres .27
Annex C (normative) Family specifications for A4c multimode fibres .31
Annex D (normative) Family specifications for A4d multimode fibres.35
Table 1 – Relevant dimensional attributes and measurement methods.11
Table 2 – Requirements common to all fibres of category A4 .11
Table 3 – Additional attributes required in family specifications.13
Table 4 – Relevant mechanical attributes and test methods .13
Table 5 – Requirements common to fibres of category A4.13
Table 6 – Additional attributes required in family specifications.13
Table 7 – Relevant transmission and measurement methods .19
Table 8 – Additional attributes required in family specifications.21
Table 9 – Relevant environmental attributes and test methods.21
Table A.1 – Dimensional requirements specific to A4a fibres .23
Table A.2 – Mechanical requirements specific to A4a fibres.23
Table A.3 – Transmission requirements specific to A4a fibres.25
Table B.1 – Dimensional requirements specific to A4b fibres .27
Table B.2 – Mechanical requirements specific to A4b fibres.27
Table B.3 – Transmission requirements specific to A4b fibres.29
Table C.1 – Dimensional requirements specific to A4c fibres .31
Table C.2 – Mechanical requirements specific to A4c fibres.31
Table C.3 – Transmission requirements specific to A4c fibres.33
Table D.1 – Dimensional requirements specific to A4d fibres .35
Table D.2 – Mechanical requirements specific to A4d fibres.35
Table D.3 – Transmission requirements specific to A4d fibres.37

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60793-2-40 © IEC:2002 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRES –
Part 2-40: Product specifications –
Sectional specification for category A4 multimode fibres
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60793-2-40 has been prepared by subcommittee 86A: Fibres and
cables, of IEC technical committee 86: Fibre optics.
This part 2-40 constitutes part of the IEC 60793-2 series, fifth edition. This series has been
1
restructured and is composed of IEC 60793-2: Product specifications – General as well as
various parts IEC 60793-2-x, devoted to different types of fibres. The IEC 60793-2 series as a
whole replaces the fourth edition of IEC 60793-2, published in 1998, of which it constitutes a
technical revision
The text of this standard is based on the following documents:
FDIS Report on voting
86A/737/FDIS 86A/755/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 3.
___________
1
Under consideration

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60793-2-40 © IEC:2002 – 7 –
Annexes A, B, C and D form an integral part of this standard.
The committee has decided that the contents of this publication will remain unchanged until
2003. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.

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60793-2-40 © IEC:2002 – 9 –
OPTICAL FIBRES –
Part 2-40: Product specifications –
Sectional specification for category A4 multimode fibres
1 Scope and object
This part of IEC 60793-2 is applicable to optical fibre types A4a, A4b, A4c, and A4d. These
fibres are used or can be incorporated in information transmission equipment and optical fibre
cables (typically up to 100 m).
Three types of requirements apply to these fibres:
• general requirements, as defined in IEC 60793-2;
• specific requirements common to the category A4 multimodal fibres covered in this
standard and which are given in clause 3;
• particular requirements applicable to individual fibre types or specific applications, which
are defined in the normative family specification annexes.
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 60068-1, Environmental testing – Part 1: General and guidance
IEC 60793-1 (all parts), Optical fibres – Part 1: Generic specification
IEC 60793-1-20:2001, Optical fibres – Part 1-20: Measurement methods and test procedures
– Fibre geometry
IEC 60793-1-21:2001, Optical fibres – Part 1-21: Measurement methods and test procedures
– Coating geometry
IEC 60793-1-22:2001, Optical fibres – Part 1-22: Measurement methods and test procedures
– Length measurement
IEC 60793-1-40:2001, Optical fibres – Part 1-40: Measurement methods and test procedures
– Attenuation
IEC 60793-1-41:2001, Optical fibres – Part 1-41: Measurement methods and test pr
...