EN 61753-121-2:2017

SLOVENSKI STANDARD
01-januar-2018
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Fibre optic interconnecting devices and passive components - Performance standards -
Part 121-2: Simplex and duplex cords with singlemode fibre and cylindrical ferrule
connectors for category C - Controlled environment (IEC 61753-121-2:2017)
Lichtwellenleiter - Verbindungselemente und passive Bauteile - Betriebsverhalten - Teil
121-2: Simplex- und Duplexkabel mit Einmoden-Lichtwellenleiter-Steckverbindern mit
zylindrischen Ferrulen für die Kategorie C - Kontrollierte Umgebung (IEC 61753-121-
2:2017)
Dispositifs d'interconnexion et composants passifs à fibres optiques - Norme de qualité
de fonctionnement - Partie 121-2: Cordons simplex et duplex avec fibres unimodales,
munis de connecteurs à férule cylindrique pour catégorie C - Environnement contrôlé
(IEC 61753-121-2:2017)
Ta slovenski standard je istoveten z: EN 61753-121-2:2017
ICS:
33.180.20 3RYH]RYDOQHQDSUDYH]D Fibre optic interconnecting
RSWLþQDYODNQD devices
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 61753-121-2

NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2017
ICS 33.180.20 Supersedes EN 61753-121-2:2010
English Version
Fibre optic interconnecting devices and passive components -
Performance standard - Part 121-2: Simplex and duplex cords
with single-mode fibre and cylindrical ferrule connectors for
category C - Controlled environment
(IEC 61753-121-2:2017)
Dispositifs d'interconnexion et composants passifs Lichtwellenleiter - Verbindungselemente und passive
fibroniques - Norme de performance - Bauteile -Betriebsverhalten - Teil 121-2: Simplex- und
Partie 121-2: Cordons simplex et duplex avec fibres Duplexkabel mit Einmoden-Lichtwellenleiter-
unimodales, munis de connecteurs à férule cylindrique pour Steckverbindern mit zylindrischen Ferrulen für die Kategorie
catégorie C - Environnement contrôlé C - Kontrollierte Umgebung
(IEC 61753-121-2:2017) (IEC 61753-121-2:2017)
This European Standard was approved by CENELEC on 2017-06-27. 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 61753-121-2:2017 E

European foreword
The text of document 86B/4076/FDIS, future edition 2 of IEC 61753-121-2, prepared by SC 86B "Fibre
optic interconnecting devices and passive components" of IEC/TC 86 "Fibre optics" was submitted to
the IEC-CENELEC parallel vote and approved by CENELEC as EN 61753-121-2:2017.

The following dates are fixed:
(dop) 2018-04-20
• 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 (dow) 2020-10-20
standards conflicting with the
document have to be withdrawn
This document supersedes EN 61753-121-2:2010.

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 61753-121-2:2017 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 60794-1-2:2017 NOTE Harmonized as EN 60794-1-2:2017 (not modified).
IEC 60794-2 NOTE Harmonized as EN 60794-2.
IEC 61300 Series NOTE Harmonized as EN 61300 Series.
IEC 61753 Series NOTE Harmonized as EN 61753 Series.
IEC 61756-1 NOTE Harmonized as EN 61756-1.
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

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.
NOTE 1  Where 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 60793-2-50 -  Optical fibres - EN 60793-2-50 -
Part 2-50: Product specifications -
Sectional specification for class B single-
mode fibres
IEC 60794-2-50 -  Optical fibre cables - EN 60794-2-50 -
Part 2-50: Indoor cables - Family
specification for simplex and duplex cables
for use in terminated cable assemblies
IEC 60794-2-51 -  Optical fibre cables - EN 60794-2-51 -
Part 2-51: Indoor cables - Detail
specification for simplex and duplex cables
for use in cords for controlled environment
IEC 61300-1 -  Fibre optic interconnecting devices and EN 61300-1 -
passive components - Basic test and
measurement procedures -
Part 1: General and guidance
IEC 61300-2-4 -  Fibre optic interconnecting devices and EN 61300-2-4 -
passive components - Basic test and
measurement procedures -
Part 2-4: Tests - Fibre/cable retention
IEC 61300-2-22 -  Fibre optic interconnecting devices and EN 61300-2-22 -
passive components - Basic test and
measurement procedures -
Part 2-22: Tests - Change of temperature
IEC 61300-2-42 -  Fibre optic interconnecting devices and EN 61300-2-42 -
passive components - Basic test and
measurement procedures - Part 2-42:
Tests - Static side load for strain relief
IEC 61300-2-44 -  Fibre optic interconnecting devices and EN 61300-2-44 -
passive components - Basic test and
measurement procedures -
Part 2-44: Tests - Flexing of the strain relief
of fibre optic devices
Publication Year Title EN/HD Year

IEC 61300-3-1 -  Fibre optic interconnecting devices and EN 61300-3-1 -
passive components - Basic test and
measurement procedures -
Part 3-1: Examinations and measurements
- Visual examination
IEC 61300-3-3 -  Fibre optic interconnecting devices and EN 61300-3-3 -
passive components - Basic test and
measurement procedures -
Part 3-3: Examinations and measurements
- Active monitoring of changes in
attenuation and return loss
IEC 61300-3-6 -  Fibre optic interconnecting devices and EN 61300-3-6 -
passive components - Basic test and
measurement procedures -
Part 3-6: Examinations and measurements
- Return loss
IEC 61300-3-22 -  Fibre optic interconnecting devices and EN 61300-3-22 -
passive components - Basic test and
measurement procedures -
Part 3-22: Examinations and
measurements - Ferrule compression force
IEC 61300-3-25 -  Fibre optic interconnecting devices and EN 61300-3-25 -
passive components - Basic test and
measurement procedures -
Part 3-25: Examinations and
measurements - Concentricity of non-
angled ferrules and non-angled ferrules
with fibre installed
IEC 61300-3-26 -  Fibre optic interconnecting devices and EN 61300-3-26 -
passive components - Basic test and
measurement procedures -
Part 3-26: Examinations and
measurements - Measurement of the
angular misalignment between fibre and
ferrule axes
IEC 61300-3-28 -  Fibre optic interconnecting devices and EN 61300-3-28 -
passive components - Basic test and
measurement procedures -
Part 3-28: Examinations and
measurements - Transient loss
IEC 61300-3-34 -  Fibre optic interconnecting devices and EN 61300-3-34 -
passive components - Basic test and
measurement procedures -
Part 3-34: Examinations and
measurements - Attenuation of random
mated connectors
IEC 61300-3-35 -  Fibre optic interconnecting devices and EN 61300-3-35 -
passive components - Basic test and
measurement procedures -
Part 3-35: Examinations and
measurements - Visual inspection of fibre
optic connectors and fibre-stub
transceivers
Publication Year Title EN/HD Year

IEC 61300-3-47 -  Fibre optic interconnecting devices and EN 61300-3-47 -
passive components - Basic test and
measurement procedures -
Part 3-47: Examinations and
measurements - Endface geometry of
PC/APC spherically polished ferrules using
interferometry
IEC 61753-1 -  Fibre optic interconnecting devices and EN 61753-1 -
passive components performance standard
- Part 1: General and guidance for
performance standards
IEC 61753-021-2 -  Fibre optic interconnecting devices and EN 61753-021-2 -
passive components performance standard
- Part 021-2: Grade C/3 single-mode fibre
optic connectors for category C -
Controlled environment
IEC 61754 Series Fibre optic interconnecting devices and EN 61754 Series
passive components - Fibre optic
connector interfaces
IEC 61755 Series Fibre optic interconnecting devices and EN 61755 Series
passive components - connector optical
interfaces
IEC/TR 61931 -  Fibre optic - Terminology - -

IEC 61753-121-2 ®
Edition 2.0 2017-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components – Performance

standard –
Part 121-2: Simplex and duplex cords with single-mode fibre and cylindrical

ferrule connectors for category C – Controlled environment

Dispositifs d’interconnexion et composants passifs fibroniques – Norme de

performance –
Partie 121-2: Cordons simplex et duplex avec fibres unimodales, munis de

connecteurs à férule cylindrique pour catégorie C – Environnement contrôlé

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.20 ISBN 978-2-8322-4390-9

– 2 – IEC 61753-121-2:2017 © IEC 2017
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 7
4 Description . 8
4.1 General . 8
4.2 Optical fibres . 8
4.3 Cable design and construction . 8
4.4 Optical connectors . 8
4.4.1 Mechanical connectivity . 8
4.4.2 Optical performance requirements . 8
4.4.3 Connector set performance requirements . 8
4.5 Cable bend radius . 8
5 Tests . 8
5.1 General . 8
5.2 Measurement wavelengths . 9
5.3 Device under test . 9
5.4 Test report . 9
6 Test procedure . 9
6.1 General . 9
6.2 Visual examination . 9
6.3 Fibre optic connector plug end face . 9
6.4 Optical performance requirements . 10
6.5 Environmental performance requirements . 11
6.6 Mechanical performance requirements . 12
Annex A (normative) Sample size requirements . 14
Annex B (normative) Visual examination of outer cable sheath movement . 15
B.1 Scope . 15
B.2 Preparation of the DUT and initial visual examination . 15
B.3 Final visual examination of outer cable sheath movement . 15
Annex C (normative) Change of temperature . 16
Bibliography . 17

Figure B.1 – Initial marking of the cable sheath . 15
Figure B.2 – Final visual examination. 15
Figure C.1 – Change of temperature test configuration . 16

Table 1 – Wavelengths for attenuation and return loss measurements . 9
Table 2 – Visual examination requirements . 9
Table 3 – End face requirements . 10
Table 4 – Optical performance requirements . 10
Table 5 – Environmental performance requirements . 11
Table 6 – Mechanical performance requirements . 12
Table A.1 – Sample size requirements . 14

IEC 61753-121-2:2017 © IEC 2017 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING DEVICES
AND PASSIVE COMPONENTS –
PERFORMANCE STANDARD –
Part 121-2: Simplex and duplex cords with single-mode
fibre and cylindrical ferrule connectors for category C –
Controlled environment
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
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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
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services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
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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 61753-121-2 has been prepared by subcommittee 86B: Fibre optic
interconnecting devices and passive components, of IEC technical committee 86: Fibre optics.
This second edition cancels and replaces the first edition published in 2010. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) merge an optical performance requirement of a reference cord;
b) delete Annexes D and E due to updated relevant standard document;

– 4 – IEC 61753-121-2:2017 © IEC 2017
c) modify the whole document structure according to the latest ISO/IEC Directives.
The text of this International Standard is based on the following documents:
FDIS Report on voting
86B/4076/FDIS 86B/4084/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of IEC 61753 series, published under the general title Fibre optic
interconnecting devices and passive components – Performance standard, can be found on
the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• a
...