Aerospace series - Cables, optical 125 μm diameter cladding - Part 301: Tight structure 50/125 μm GI, fibre nominal 1,8 mm, outside diameter - Product standard

This document specifies the general characteristics, conditions for qualification, acceptance and quality
assurance for a fibre optic cable with a 50/125 µm Graded Index fibre core, 1,8 mm outside diameter
for non pull-proof contact designs.

Luft- und Raumfahrt - Lichtwellenleiterkabel, Claddingdurchmesser 125 μm - Teil 301: Festaderaufbau GI 50/125 μm, Faser Kabelaußendurchmesser 1,8 mm - Produktnorm

Série aérospatiale - Câbles, optiques, diamètre extérieur de la gaine optique 125 μm - Partie 301 : Câble à structure serrée, fibre à gradient d'indice 50/125 μm, diamètre extérieur 1,8 mm - Norme de produit

Aeronavtika - Optični kabli, premer vlakna z oklepom 125 µm - 301. del: Kompaktna struktura 50/125 µm GI, imenski zunanji premer kabla 1,8 mm - Standard za izdelek

Ta dokument določa splošne značilnosti ter pogoje kvalifikacije, sprejemljivosti in zagotavljanja kakovosti za optični kabel z jedrom iz gradientnih indeksnih vlaken 50/125 µm ter zunanjim premerom 1,8 mm za spoje, ki se v primeru sile ne razdružijo.

General Information

Status
Published
Publication Date
05-Apr-2022
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
30-Mar-2022
Due Date
04-Jun-2022
Completion Date
06-Apr-2022

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SLOVENSKI STANDARD
SIST EN 4641-301:2022
01-maj-2022
Nadomešča:
SIST EN 4641-301:2011
Aeronavtika - Optični kabli, premer vlakna z oklepom 125 µm - 301. del:
Kompaktna struktura 50/125 µm GI, imenski zunanji premer kabla 1,8 mm -
Standard za izdelek

Aerospace series - Cables, optical 125 μm diameter cladding - Part 301: Tight structure

50/125 μm GI, fibre nominal 1,8 mm, outside diameter - Product standard

Luft- und Raumfahrt - Lichtwellenleiterkabel, Claddingdurchmesser 125 μm - Teil 301:

Festaderaufbau GI 50/125 μm, Faser Kabelaußendurchmesser 1,8 mm - Produktnorm

Série aérospatiale - Câbles, optiques, diamètre extérieur de la gaine optique 125 μm -

Partie 301 : Câble à structure serrée, fibre à gradient d'indice 50/125 μm, diamètre

extérieur 1,8 mm - Norme de produit
Ta slovenski standard je istoveten z: EN 4641-301:2022
ICS:
33.180.10 (Optična) vlakna in kabli Fibres and cables
49.060 Letalska in vesoljska Aerospace electric
električna oprema in sistemi equipment and systems
SIST EN 4641-301:2022 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 4641-301:2022
---------------------- Page: 2 ----------------------
SIST EN 4641-301:2022
EN 4641-301
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2022
EUROPÄISCHE NORM
ICS 49.090 Supersedes EN 4641-301:2011
English Version
Aerospace series - Cables, optical 125 µm diameter
cladding - Part 301: Tight structure 50/125 µm GI, fibre
nominal 1,8 mm, outside diameter - Product standard

Série aérospatiale - Câbles, optiques, diamètre Luft- und Raumfahrt - Lichtwellenleiterkabel,

extérieur de la gaine optique 125 µm - Partie 301 : Claddingdurchmesser 125 µm - Teil 301:

Câble à structure serrée, fibre à gradient d'indice Festaderaufbau GI 50/125 µm, Faser

50/125 µm, diamètre extérieur 1,8 mm - Norme de Kabelaußendurchmesser 1,8 mm - Produktnorm

produit
This European Standard was approved by CEN on 25 January 2021.

CEN 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 CEN

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 CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 4641-301:2022 E

worldwide for CEN national Members.
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SIST EN 4641-301:2022
EN 4641-301:2022 (E)
Contents Page

European foreword ...................................................................................................................................................... 3

1 Scope .................................................................................................................................................................... 4

2 Normative references .................................................................................................................................... 4

3 Terms and definitions ................................................................................................................................... 4

4 Required characteristics .............................................................................................................................. 5

5 Cable construction .......................................................................................................................................... 5

6 Materials ............................................................................................................................................................ 6

7 Test methods and performances ............................................................................................................... 7

8 Tooling .............................................................................................................................................................. 13

9 Quality assurance ......................................................................................................................................... 13

10 Designation and marking ........................................................................................................................... 14

11 Delivery conditions ...................................................................................................................................... 14

12 Storage .............................................................................................................................................................. 15

13 Technical specification ............................................................................................................................... 15

Bibliography ................................................................................................................................................................. 16

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SIST EN 4641-301:2022
EN 4641-301:2022 (E)
European foreword

This document (EN 4641-301:2022) has been prepared by the Aerospace and Defence Industries

Association of Europe — Standardization (ASD STAN).

After enquiries and votes carried out in accordance with the rules of this Association, this document has

received the approval of the National Associations and the Official Services of the member countries of

ASD, prior to its presentation to CEN.

This document shall be given the status of a national standard, either by publication of an identical text

or by endorsement, at the latest by September 2022, and conflicting national standards shall be

withdrawn at the latest by September 2022.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 4641-301:2011.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the

following countries are bound to implement this document: Austria, Belgium, Bulgaria, Croatia, Cyprus,

Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,

Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North

Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United

Kingdom.
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SIST EN 4641-301:2022
EN 4641-301:2022 (E)
1 Scope

This document specifies the general characteristics, conditions for qualification, acceptance and quality

assurance for a fibre optic cable with a 50/125 µm Graded Index fibre core, 1,8 mm outside diameter

for non pull-proof contact designs.
2 Normative references

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.

EN 2424, Aerospace series — Marking of aerospace products

EN 3475-601, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 601: Smoke

density

EN 3745- , Aerospace series — Fibres and cables, optical, aircraft use — Test methods

EN 3909, Aerospace series — Test fluids and test methods for electrical and optical components and sub-

assemblies

EN 4641-001, Aerospace series — Cables, Optical, 125 µm diameter cladding — Part 001: Technical

specification
3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 3745-100 apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

• ISO Online browsing platform: available at https://www.iso.org/obp
• IEC Electropedia: available at https://www.electropedia.org/
All parts quoted in this document.
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SIST EN 4641-301:2022
EN 4641-301:2022 (E)
4 Required characteristics

The characteristics of the cables, tested according to the methods described hereafter, shall comply

with the values defined in this document.
5 Cable construction
See Figure 1 and Table 1.
Key
1 Core
2 Cladding
3 Primary buffer
4 Secondary buffer
5 Strength member
6 Outer jacket
Figure 1 — Cable construction
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SIST EN 4641-301:2022
EN 4641-301:2022 (E)
Table 1 — Cable dimensional information
Property Value
Core diameter (50 ± 3,0) µm
Cladding diameter (125 ± 2,0) µm
Core/cladding concentricity ≤ 3 µm
Core non circularity ≤ 5 %
Cladding non circularity ≤ 2 %
Primary Buffer (245 ± 15) µm
Attenuation at 850 nm (+20 °C) ≤ 5 dB/km
Attenuation at 1 300 nm (+20 °C) ≤ 3 dB/km
Finished Cable Diameter (1,80 ± 0,1) mm
Cable Mass ≤ 5 kg/km
Operating temperature -60 °C to 135 °C
Installation: 20 mm
Minimum bend radius (+20 °C) Long term: 20 mm
Storage: 40 mm
Strength member weave pitch 3 mm ≤ p ≤ 20 mm
Tensile strength > 200 N
6 Materials
See Table 2.
Table 2 — Cable materials
Element Material
Core
Fibre Silica
Cladding
Primary buffer High temperature Polyacrylate
Secondary buffer High temperature Polymer(s)
Mechanical strength reinforcement Aramid/aramid-fibre glass woven braid
Jacket(s) High temperature Polymer
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SIST EN 4641-301:2022
EN 4641-301:2022 (E)
7 Test methods and performances
7.1 Tests in accordance with EN 3745-100.
7.1.1 Optical fibre
See Table 3.
Table 3 — Optical fibre performance requirements
Test method
Designation of the test Test conditions and results
EN 3745-
201 Visual examination Pass
202 Fibre core dimensions Method A: Core diameter = (50 ± 3) µm
501 Optical fibre proof test > 1 %
Cladding diameter: (125 ± 2) µm
Method A or B
202 Fibre cladding dimension
Sample should be in accordance with test methods
Number of samples: 1
Primary coating outside
203 Not applicable
diameter
Fibre dimensions, core non- Core non circularity: ≤ 5 % (3 µm)
202
circularity Number of samples: 1
Fibre dimensions, cladding Cladding non-circularity: ≤ 2 % (2,5 µm)
202
non-circularity Number of samples: 1
Concentricity error: ≤ 3 µm
Fibre dimensions,
202
concentricity error
Number of samples: 1
Numerical aperture:
(0,2 ± 0,015) at λ = (850 ± 20) nm
302 Numerical aperture
Sample length: 2 m
Bandwidth ≥ 500 MHz/km at 850 nm
Bandwidth ≥ 500 MHz/km at 1 300 nm
Number of samples: 1
303 Bandwidth
Minimum sample length: 1 km
Central wavelengths: (850 ± 10) nm, (1 300 ± 10) nm
Spectral width (-3 dB): ≤ 10 nm for 850 nm
7.1.2 Fibre optic cable
Fibre optic cable performance requirements.
See Table 4.
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