Bsi bs en 04641 001 2009

BS EN 4641 001 2009 ICS 49 060 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BRITISH STANDARD Aerospace series — Cables, optical, 125 µm diameter cladding Part 001 Technical s[.]

ICS 49.060

Aerospace series —

Cables, optical, 125 µm

diameter cladding

Part 001: Technical specification

This British Standard

was published under the

authority of the Standards

Policy and Strategy

Committee on 30 April

2009

© BSI 2009

ISBN 978 0 580 57056 8

Amendments/corrigenda issued since publication

Date Comments

National foreword

This British Standard is the UK implementation of EN 4641-001:2009 The UK participation in its preparation was entrusted to Technical Committee ACE/6, Aerospace avionic electrical and fibre optic technology

A list of organizations represented on this committee can be obtained on request to its secretary

This publication does not purport to include all the necessary provisions

of a contract Users are responsible for its correct application

Compliance with a British Standard cannot confer immunity from legal obligations.

NORME EUROPÉENNE

ICS 49.060

English Version

Aerospace series Cables, optical, 125 µm diameter cladding

-Part 001: Technical specification

Série aérospatiale - Câbles, optiques, diamètre extérieur de

la gaine optique 125 µm - Partie 001 : Spécification

technique

Luft- und Raumfahrt - Kabel, optisch, 125 µm Außendurchmesser des Fasermantels - Teil 001:

Technische Spezifikation

This European Standard was approved by CEN on 7 February 2009.

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 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 Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION

C O M I T É E U R O P É E N D E N O R M A L I S A T I O N

E U R O P Ä I S C H E S K O M I T E E F Ü R N O R M U N G

Contents Page

Foreword 3

1 Scope 4

2 Normative references 4

3 Terms and definitions, symbols and abbreviations 4

4 Required characteristics 5

5 Test methods 6

6 Quality assurance 8

7 Designation and marking 12

8 Delivery conditions 13

9 Storage 13

Foreword

This document (EN 4641-001:2009) 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 Standard 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 European Standard shall be given the status of a national standard, either by publication of an identical

text or by endorsement, at the latest by September 2009, and conflicting national standards shall be withdrawn at the latest by September 2009

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

rights CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom

1 Scope

This standard 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 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

EN 2591-602, Aerospace series — Elements of electrical and optical connection — Test methods — Part 602:

Optical elements — Variation of attenuation and optical discontinuity

EN 3745-100:2008*, 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 1)

EN 3909, Aerospace series — Test fluids and test methods for electric components and sub-assemblies

EN 9133, Aerospace series — Quality management systems — Qualification procedure for aerospace

standard parts

IEC 60793-1-42, Optical fibres — Part 1-42: Measurement methods and test procedures — Chromatic

dispersion

ISO 2574, Aircraft — Electrical cables — Identification marking

3 Terms and definitions, symbols and abbreviations

For the purposes of this document, the following terms and definitions and the symbols and abbreviations

given in EN 3745-100:2008 apply

3.1

tight structure cable

cable where there is very limited movement of the fibre within the buffer and other elements of the cable

construction; typically designed for use with non-pull proof fibre optic contacts

3.2

semi-loose structure cable

cable where the fibre is designed to move within the buffer and other elements of the cable construction;

typically designed for use with full pull proof fibre optic contacts

* And all parts quoted in this standard

1) In preparation at the date of publication of this standard

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

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 Buffer

2 Primary coating

3 Cladding

4 Core

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

1 2 3 4

Key

1 Outer jacket

2 Strength member

3 Inner sheath

4 Buffer

5 Core

6 Cladding

7 Primary coating

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 method

EN 3745- Designation of test Test performance/conditions/criteria

201 Visual examination The primary coating and buffer shall have the correct

identification outer colour if specified in the product standard

202 Fibre dimensions See product standard

501 Optical fibre proof test See product standard

301

302 Numerical aperture See product standard

1 2 3 4

5 6 7

5.1.2 Fibre optic cable

See Table 2

Table 2 — Fibre optic cable test methods Test method

EN 3745- Designation of test Test performance/conditions/criteria

201 Visual examination The outer jacket shall have the correct identification if

specified in the appropriate product standard

The coating shall be continuous and free of visible defects such as lumps, abrasions, cracks, splits or blisters

See product standard

203 Cable dimensions

Primary coating outside diameter

Buffer diameter

Outer jacket outside diameter

Outer jacket wall thickness

To be measured at both ends of each batch

205 Cable longitudinal

dimensional stability See product standard

301:

Method A Attenuation See product standard

402 Temperature cycling See product standard

301:

Method C Attenuation during temperature cycling See product standard

404 Thermal shock See product standard

406 Cold bend test See product standard

407 Flammability See product standard

410 Thermal life See product standard

411 Resistance to fluids See product standard

412 Humidity resistance See product standard

503 Scrape abrasion See product standard

504 Micro bending test See product standard

505 Cable tensile strength See product standard

506 Impact resistance See product standard

507 Cut-through See product standard

509 Kink test See product standard

510 Bending test See product standard

Table 2 — Fibre optic cable test methods (concluded)

Test method

EN 3745- Designation of test Test performance/conditions/criteria

512 Flexure endurance See product standard

513 Crush resistance See product standard

514 Cable twist bend See product standard

601 Smoke density See product standard

603 Nuclear radiation See product standard

701 Strippability See product standard

703 Durability of manufacturer's marking See product standard

705 Contrast measurement See product standard

706

EN 3838 except

"Voltage test"

Durability of user identification markings See product standard

202 Include all sections of concentricity See product standard

5.2 Special tests

Additional tests particular to the product may be defined in the specific product standard

6 Quality assurance

6.1 General

See EN 9133

6.2 Qualification

6.2.1 Qualification conditions

The cables shall be submitted for qualification tests on drums, spools or in coils of sufficient length, wound

evenly and uniformly

Each drum, spool or coil shall have a label containing information given in 8.2

6.2.2 Qualification tests

See Table 3 Tests indicated by ‘X’ in the ‘Qualification’ column are applicable

EN

Table 3 — Tests: methods, application and requirements

Description Standard

Requirements (and / or particulars) Sanction / Approval

Optical fibre

Fibre dimension EN 3745 X X Test method 202 As detailed in the appropriate product standard

Fibre dimension

Coating / cladding EN 3745 X X Test method 202 As detailed in the appropriate product standard

Numerical aperture EN 3745 X X Test method 302 Method A or B As detailed in the appropriate product standard

Index of refraction IEC 60793 X X IEC 60793-1-42 Not applicable for singlemode fibre As detailed in the appropriate product standard

Bandwidth IEC 60793 X X IEC 60793-1-42 Not applicable to singlemode fibre As detailed in the appropriate product standard

Fibre chromatic

dispersion IEC 60793 X IEC 60793-1-42 As detailed in the appropriate product standard

Optical cable

Visual inspection EN 3745 X X X Test method 201 As detailed in the appropriate product standard

Cable primary coating EN 3745 X X Test method 202 As detailed in the appropriate product standard

Cable external dimension EN 3745 X X Test method 202 As detailed in the appropriate product standard

Cable longitudinal

stability EN 3745 X X Test method 205 As detailed in the appropriate product standard

Cable attenuation 20 °C EN 3745 X X Test method 301 Method A or B as defined in the product standard As detailed in the appropriate product standard

Cable attenuation

– 55 °C / 125 °C EN 3745 X X Test method 301 Method C As detailed in the appropriate product standard

EN

Table 3 — Tests: methods, application and requirements (continued)

Description Standard

Requirements (and / or particulars) Sanction / Approval

Optical cable (continued)

Optical discontinuity EN 2591 X Test method 602 Method B ‘Optical Discontinuity’ As detailed in the appropriate product standard

Immunity to ambient light

coupling EN 3745 X Test method 305 As detailed in the appropriate product standard

Variation of attenuation

during temperature

cycling EN 3745 X X Test method 306

As detailed in the appropriate product standard

Accelerated ageing EN 3745 X Test method 401 Test to be carried out at 125 °C As detailed in the appropriate product standard

Thermal shock EN 3745 X Test method 404 As detailed in the appropriate product standard

Cold bend test EN 3745 X Test method 406 Method A or B as defined in the product standard As detailed in the appropriate product standard

Flammability EN 3745 X Test method 407 As detailed in the appropriate product standard

Thermal life EN 3745 X Test method 410 As detailed in the appropriate product standard

Resistance to fluids EN 3909 X Tests required to be defined in the appropriate product standard As detailed in the appropriate product standard

Humidity resistance EN 3745 X Test method 412 As detailed in the appropriate product standard

Optical fibre proof test EN 3745 X Test method 501 As detailed in the appropriate product standard

Scrape abrasion EN 3745 X Test method 503 As detailed in the appropriate product standard

Micro bending EN 3745 X Test method 504 As detailed in the appropriate product standard

continued

EN

Table 3 — Tests: methods, application and requirements (concluded)

Description Standard

Requirements (and / or particulars) Sanction / Approval

Optical cable (concluded)

Tensile strength EN 3745 X X Test method 505 Method A or B as defined in the appropriate product standard As detailed in the appropriate product standard

Impact test EN 3745 X Test method 506 As detailed in the appropriate product standard

Cut-through EN 3745 X Test method 507 As detailed in the appropriate product standard

Torsion test EN 3745 X Test method 508 As detailed in the appropriate product standard

Kink test EN 3745 X Test method 509 As detailed in the appropriate product standard

Bending test EN 3745 X X Test method 510 As detailed in the appropriate product standard

Cable to cable abrasion EN 3745 X Test method 511 As detailed in the appropriate product standard

Flexure endurance EN 3745 X Test method 512 As detailed in the appropriate product standard

Crush resistance EN 3745 X Test method 513 As detailed in the appropriate product standard

Smoke density EN 3745 X Test method 601 As detailed in the appropriate product standard

Toxicity EN 3745 X Test method 602 As detailed in the appropriate product standard

Nuclear radiation EN 3745 X Test method 603 As detailed in the appropriate product standard

Strippability EN 3745 X Test method 701 As detailed in the appropriate