EN IEC 61756-1:2020

Fibre optic interconnecting devices and passive components - Interface standard for fibre management systems - Part 1: General and guidance

IEC 61756-1:2019 covers general information on fibre management system interfaces. It includes the definitions and rules under which a fibre management system interface is created and it provides also criteria to identify the minimum bending radius for stored fibres. This document allows both single-mode and multimode fibre to be used. Liquid, gas or dust sealing requirements at the cable entry area or cable element ending are not covered in this document. This second edition cancels and replaces the first edition published in 2006. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - addition of figures to show the interface between protective housing and fibre management system; - addition of definitions for protective housing, closure, wall box, street cabinets and optical distribution frame modules; - addition of table with dimensions of fusion splice protectors and mechanical splices; - addition of method to identify the minimum bending radius for stored fibres; - addition of clause for other factors relevant to fibre management systems; - addition of annex A for example of calculating the minimum bending radius of stored fibres in a fibre management system. Keywords: fibre management system interfaces, minimum bending radius for stored fibres

Lichtwellenleiter - Verbindungselemente und passive Bauteile - Schnittstellennorm für Einzelfasermanagementsysteme - Teil 1: Allgemeines und Leitfaden

Dispositifs d'interconnexion et composants passifs fibroniques - Norme d'interface pour les systèmes de gestion de fibres - Partie 1: Généralités et recommandations

IEC 61767-1:2019 englobe des informations générales sur les interfaces de système de gestion des fibres. Elle comprend les définitions et les règles régissant la création d'une interface de système de gestion des fibres et elle fournit des critères permettant d'identifier le rayon de courbure minimal des fibres stockées. Le présent document permet d'utiliser les fibres unimodales et les fibres multimodales. Les exigences relatives à l'étanchéité aux liquides, aux gaz ou à la poussière au niveau de la zone d'entrée de câble ou à l'extrémité des éléments de câble ne sont pas couvertes par le présent document. Cette deuxième édition annule et remplace la première édition parue en 2006 dont elle constitue une révision technique. La présente édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: - ajout de figures de représentation de l'interface entre une enveloppe de protection et le système de gestion des fibres; - ajout des définitions d'enveloppe de protection, de boîtier, de boîte murale, d'armoire située dans un environnement urbain et de module répartiteur optique; - ajout d'un tableau qui donne les dimensions des protecteurs d'épissures par fusion et des épissures mécaniques; - ajout d'une méthode permettant d'identifier le rayon de courbure minimal des fibres stockées; - ajout d'un article portant sur d'autres facteurs applicables aux systèmes de gestion des fibres; - ajout de l'Annexe A qui donne un exemple de calcul du rayon de courbure minimal des fibres stockées dans un système de gestion des fibres. Mots clés : interfaces de système de gestion des fibres, rayon de courbure minimal des fibres stockées

Povezovalne naprave in pasivne komponente optičnih vlaken - Vmesniški standard za sisteme upravljanja z optičnimi kabli - 1. del: Splošno in smernice (IEC 61756-1:2019)

General Information

• Status: Published
• Publication Date: 05-Mar-2020
• Withdrawal Date: 31-Dec-2020
• ICS: 33.180.01 - Fibre optic systems in general
• Technical Committee: CLC/TC 86BXA - Fibre optic interconnect, passive and connectorised components
• Drafting Committee: IEC/SC 86B - IEC_SC_86B
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 06-Mar-2020
• Completion Date: 06-Mar-2020
• Ref Project: SIST EN IEC 61756-1:2020 - Fibre optic interconnecting devices and passive components - Interface standard for fibre management systems - Part 1: General and guidance (IEC 61756-1:2019)

Relations

• Replaces: EN 61756-1:2006 - Fibre optic interconnecting devices and passive components - Interface standard for fibre management systems - Part 1: General and guidance
• Effective Date: 20-Dec-2016

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2020
Nadomešča:
SIST EN 61756-1:2006
Povezovalne naprave in pasivne komponente optičnih vlaken - Vmesniški
standard za sisteme upravljanja z optičnimi kabli - 1. del: Splošno in smernice (IEC
61756-1:2019)
Fibre optic interconnecting devices and passive components - Interface standard for fibre
management systems - Part 1: General and guidance (IEC 61756-1:2019)
Lichtwellenleiter - Verbindungselemente und passive Bauteile - Schnittstellennorm für
Einzelfasermanagementsysteme - Teil 1: Allgemeines und Leitfaden (IEC 61756-1:2019)
Dispositifs d'interconnexion et composants passifs à fibres optiques - Norme d'interface
pour les systèmes de gestion de fibres - Partie 1: Généralités et lignes directrices (IEC
61756-1:2019)
Ta slovenski standard je istoveten z: EN IEC 61756-1:2020
ICS:
33.180.20 Povezovalne naprave za Fibre optic interconnecting
optična vlakna devices
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 61756-1

NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2020
ICS 33.180.01 Supersedes EN 61756-1:2006 and all of its amendments
and corrigenda (if any)
English Version
Fibre optic interconnecting devices and passive components -
Interface standard for fibre management systems - Part 1:
General and guidance
(IEC 61756-1:2019)
Dispositifs d'interconnexion et composants passifs Lichtwellenleiter - Verbindungselemente und passive
fibroniques - Norme d'interface pour les systèmes de Bauteile - Schnittstellennorm für
gestion de fibres - Partie 1: Généralités et Einzelfasermanagementsysteme - Teil 1: Allgemeines und
recommandations Leitfaden
(IEC 61756-1:2019) (IEC 61756-1:2019)
This European Standard was approved by CENELEC on 2020-01-01. 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 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, 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: Rue de la Science 23, B-1040 Brussels
© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61756-1:2020 E

European foreword
The text of document 86B/4228/FDIS, future edition 2 of IEC 61756-1, 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 IEC 61756-1:2020.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2020-10-01
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2021-01-01
document have to be withdrawn
This document supersedes EN 61756-1:2006 and all of its amendments and corrigenda (if any).
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 61756-1:2019 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 60794-2 NOTE Harmonized as EN 60794-2
IEC 60794-3 NOTE Harmonized as EN 60794-3
IEC 60874-1:2011 NOTE Harmonized as EN 60874-1:2012 (not modified)
IEC 61753 (series) NOTE Harmonized as EN 61753 (series)
IEC 62134-1 NOTE Harmonized as EN 62134-1

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 60793-2-10 -  Optical fibres - Part 2-10: Product EN IEC 60793-2-10 -
specifications - Sectional specification for
category A1 multimode fibres
IEC 60793-2-50 -  Optical fibres - Part 2-50: Product EN IEC 60793-2-50 -
specifications - Sectional specification for
class B single-mode fibres
IEC 61756-1 ®
Edition 2.0 2019-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Fibre optic interconnecting devices and passive components – Interface

standard for fibre management systems –

Part 1: General and guidance
Dispositifs d'interconnexion et composants passifs fibroniques – Norme

d'interface pour les systèmes de gestion de fibres –

Partie 1: Généralités et recommandations

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.01 ISBN 978-2-8322-7511-5

– 2 – IEC 61756-1:2019 © IEC 2019
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
3.1 Fibre management related definitions . 6
3.2 Component related definitions . 9
3.3 Protective housing related definitions . 11
4 Abbreviated terms . 12
5 Description of a fibre management system . 13
6 Parts and functions of a fibre management system . 14
6.1 General . 14
6.2 Splice trays . 15
6.3 Minimum bending radius for stored fibres . 16
6.4 Splice protector . 19
6.5 Splice holder . 20
6.6 Guiding elements . 21
6.7 Patchcords and pigtails . 22
6.8 Identification of fibres, fibre tubes or single elements . 22
7 Other factors relevant to fibre management systems . 22
7.1 Re-entry and access . 22
7.2 Quality of mouldings . 22
7.3 Polymer materials . 22
7.4 Marked or colour coded parts . 22
Annex A (informative) Use of flow chart for calculation of the minimum bending radius
for stored fibres . 23
A.1 Example of calculation minimum bending radius . 23
A.2 Results for various fibre types with a 1 m storage length . 28
A.3 Results for various fibre types with 2 m storage length . 29
Bibliography . 31

Figure 1 – Multiple element management system . 7
Figure 2 – Single circuit management system. 8
Figure 3– Single element management system . 8
Figure 4– Patchcord . 11
Figure 5– Pigtail . 11
Figure 6 – Functional parts diagram of a protective housing. 13
Figure 7 – Functional parts diagram of FMS . 14
Figure 8 – Typical required failure probabilities of various networks . 17
Figure 9 – Lifetimes per bent fibre metre versus failure probability for various
bending radii . 18
Figure 10 – Flow chart for minimum bending radius of stored fibres . 19
Figure 11 – F type splice protector . 20
Figure 12– S type splice protector. 20
Figure 13 – M type fibre splice . 20

IEC 61756-1:2019 © IEC 2019 – 3 –
Figure A.1 – Step 1: Find radius that matches the failure probability target requirement. 23
Figure A.2 – Find bending radius for specified failure probability target and fibre length . 24
Figure A.3 – Step 2: Estimate the maximum attenuation increase for bending radius . 25
Figure A.4 – Estimated maximum attenuation increase for bending radius of 15 mm . 25
Figure A.5 – Step 3: Compare estimated maximum attenuation with requirement . 26
Figure A.6 – Estimated attenuation increase for bending radius of 20 mm . 27
Figure A.7 – Step 5: Check the estimated attenuation with requested maximum limit . 28
Figure A.8 – Estimated maximum attenuation increase for bending radius . 29

Table 1 – Optical fibre fusion splice protectors – Outline and nominal dimensions . 20
Table 2 – Mechanical fibre splices – Outline and nominal dimensions . 20
Table A.1 – Minimum bending radius for storage of the various fibre types with typical
mechanical failure probability targets for different network locations and fibre storage

length of 1 metre and maximum attenuation increase of 0,05 dB at 1 625 nm . 29
Table A.2 – Minimum storage radius for the various fibre types with typical mechanical
failure probability targets for different network locations and fibre storage length of 2
metres and maximum allowed attenuation increase of 0,1 dB at 1 550 nm . 30

– 4 – IEC 61756-1:2019 © IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
INTERFACE STANDARD FOR FIBRE MANAGEMENT SYSTEMS –

Part 1: General and guidance
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 pro
...