prEN 4641-001

SLOVENSKI STANDARD
01-maj-2023
Aeronavtika - Kabli, optični - 001. del: Tehnična specifikacija
Aerospace series - Cables, optical - Part 001: Technical specification
Luft- und Raumfahrt - Kabel, optisch - Teil 001: Technische Spezifikation
Série aérospatiale - Câbles, optiques - Partie 001 : Spécification technique
Ta slovenski standard je istoveten z: prEN 4641-001
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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2023
ICS 49.060 Will supersede EN 4641-001:2018
English Version
Aerospace series - Cables, optical - Part 001: Technical
specification
Série aérospatiale - Câbles, optiques - Partie 001 : Luft- und Raumfahrt - Kabel, optisch - Teil 001:
Spécification technique Technische Spezifikation
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee ASD-
STAN.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 4641-001:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Required characteristics . 5
4.1 Description . 5
4.2 Materials and construction of cables . 5
4.3 Fibre construction . 5
4.4 Cable construction . 6
5 Test methods . 8
5.1 Tests in accordance with EN 3745-100 . 8
5.1.1 Optical fibre . 8
5.1.2 Fibre optic cable . 9
5.2 Special tests . 10
6 Quality assurance . 10
6.1 General. 10
6.2 Qualification . 10
6.2.1 Qualification conditions . 10
6.2.2 Qualification tests . 10
6.3 Sampling and definition of specimens . 16
6.3.1 Introduction . 16
6.3.2 Preparation of specimens . 16
6.4 Qualification group and maintenance of qualification . 16
6.5 Quality control . 16
7 Designation and marking . 16
7.1 General principle of designation . 16
7.2 General principle of codification . 16
7.3 Dynamic product standard cross table . 16
7.4 Marking . 17
7.5 Colours . 17
8 Delivery conditions . 17
8.1 Packaging . 17
8.2 Labelling . 18
8.3 Delivery lengths. 18
9 Storage . 18
Bibliography . 19

European foreword
This document (prEN 4641-001:2023) 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-STAN, prior to its presentation to CEN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 4641-001:2018.
1 Scope
This document specifies the general characteristics, conditions for qualification, acceptance and quality
assurance, as well as the test methods and groups for fibre optic cables with a cladding of 125 µm
outside diameter.
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 3745-100, Aerospace series — Fibres and cables, optical, aircraft use — Test methods — Part 100:
General
EN 3838, Aerospace series - Requirements and tests on user-applied markings on aircraft electrical cables
EN 60793-1-30, Optical fibres - Part 1-30: Measurement methods and test procedures - Fibre proof test
(IEC 60793-1-30)
EN 60793-1-41, Optical fibres - Part 1-41: Measurement methods and test procedures – Bandwidth (IEC
60793-1-41)
EN 60793-1-42, Optical fibres - Part 1-42: Measurement methods and test procedures - Chromatic
dispersion (IEC 60793-1-42)
ISO 2574, Aircraft — Electrical cables — Identification marking
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 3745-100 and the following
apply.
ISO and IEC maintain terminology 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/
3.1
tight simplex cable
structure that allows no movement between the secondary buffer (or buffer) and the outer layers
3.2
semi-loose simplex cable
structure that allows a limited movement of the secondary buffer (or buffer) compared to the outer
layers
3.3
loose simplex cable
structure that allows an unlimited movement of the secondary buffer compared to the outer layers

And all parts quoted in this document.
3.4
tight multifibre cable
structure that allows no movement between the fibres and the outer layers
3.5
semi loose multifibre cable
structure that allows a limited movement of the secondary buffers (or buffers or inner sheaths)
compared to the outer layers
3.6
loose multifibre cable
structure that allows an unlimited movement of the fibres compared to the outer layers
3.7
tight buffer
structure that allows no movement between fibre and secondary buffer (or buffer)
3.8
loose buffer
structure that allows an unlimited movement of the fibre compared to the secondary buffer (or buffer)
4 Required characteristics
4.1 Description
The characteristics of the cables, tested according to the methods described hereafter shall comply with
the values defined in the product standard.
4.2 Materials and construction of cables
The configuration, dimensions and mass of the cable shall meet the values specified in the product
standard as well as the requirements hereafter.
Materials and colour shall meet the product standard:
— configuration (see Clause 3, no. of fibre, brais, jackets);
— dimensions;
— mass;
— colours;
— materials.
4.3 Fibre construction
The fibre shall consist of a single all silica core and a silica cladding protected by a primary coating in
accordance with the product standards.
See Figure 1.
Key
1 Core
2 Cladding
3 Primary coating
4 Buffer (optional)
Figure 1 — Fibre construction (axial view)
4.4 Cable construction
The typical requirements of the cable shall be an outer jacket, strength member, buffer and fibre, which
is protected by a primary coating. See example at Figure 2.
Details of the materials used for the outer sheath, strength member, inner sheath and buffer shall be
defined in the product standard.

Key
1 Fibre (core + primary 3 Strength members 5 External strength members
buffer) (only for ruggedised
cable)
2 Secondary buffer 4 Outer jacket for simplex 6 Outer jacket (only for
|inner sheath for ruggedised cables)
ruggedised cable
Figure 2 — Example of cable construction
5 Test methods
5.1 Tests in accordance with EN 3745-100
5.1.1 Optical fibre
See Table 1.
Table 1 — Optical fibre test methods
Test Test
Designation of
method method Test performance/conditions/criteria
test
EN 3745- EN 60793
The primary coating and buffer shall have the correct
Visual
201 / identification outer colour if specified in the product
examination
standard.
202 / Fibre dimensions See product standard.
Optical fibre
501 −1–30 See product standard.
proof test
Attenuation See product standard.
Method A
Numerical
302 / See product standard.
aperture
/ −1–41 Bandw
...