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STANDARD
SIST EN 4532:2009
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 4532February 2009ICS 49.060 English VersionAerospace series - Cables, optical, single core 200 µm/280 µmfibre, 2,5 mm outer jacket - Technical specificationSérie aérospatiale - Câbles, optiques, fibre 200 µm/280µm, diamètre extérieur 2,5 mm - Spécification techniqueLuft- und Raumfahrt - LWL-Kabel, 200 µm/280 µm Faser,2,5 mm Aussendurchmesser - TechnischeLieferbedingungenThis European Standard was approved by CEN on 5 October 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial 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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre:
Avenue Marnix 17,
B-1000 Brussels© 2009 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 4532:2009: ESIST EN 4532:2009
EN 4532:2009 (E) 2 Contents Page Foreword . 3 1 Scope . 4 2 Normative references . 4 3 Terms and definitions . 5 4 Description . 5 4.1 Construction of type 'A' primary fibre (Jacketed fibre) . 5 4.2 Construction of type 'B' single core cable . 5 5 Cable characteristics . 6 5.1 Optical performance of cable . 6 5.2 Construction data of cable (Type B) . 6 5.3 Mechanical characteristics of cable (Type B) . 7 6 Fibre characteristics . 7 6.1 Optical and material data of primary fibre . 7 6.2 Geometrical data of primary fibre and concentricity of primary coating . 8 7 Environmental conditions . 8 7.1 Temperature range . 8 7.2 Operating pressure range . 8 7.3 Humidity . 8 7.4 Nuclear radiation . 8 8 Production acceptance (routine) tests . 9 8.1 General . 9 8.2 Group A – Production acceptance (routine) tests. 9 8.3 Group B – Production verification (quality) tests .11 8.4 Group D – Qualification approval tests (cable type 'B') .12 9 Additional test information .14 9.1 Repeatability of test results .14 9.2 Definition of full launch conditions .15 9.3 Full launch techniques .15 9.4 Additional requirements .15 9.5 Practical realisation .15 9.6 Test arrangement for low- and high- temperature tests .15 10 Marking and packaging requirements .16 10.1 Designation of type 'A' primary fibre .16 10.2 Designation of type 'B' cable .16 10.3 Marking of cable .16 10.4 Ordering information .17 10.5 Cable length .17 10.6 Storage reel .17
SIST EN 4532:2009
EN 4532:2009 (E) 3 Foreword This document (EN 4532:2009) 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 August 2009, and conflicting national standards shall be withdrawn at the latest by August 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. SIST EN 4532:2009
EN 4532:2009 (E) 4 1 Scope This standard covers two cable types, Type A and Type B. Type A, jacketed fibre, is intended for printed circuit board inter-connection applications inside equipment.
Type B, single core, is intended for general airframe and equipment inter-connection cable suitable for installation in all aircraft locations, with exception of power plant compartments. These cables are particularly suitable for use in military aircraft as well as for general civil aircraft applications. 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 2591-306, Aerospace series — Elements of electrical and optical connection — Test methods — Part 306: Mould growth EN 2591-316, Aerospace series — Elements of electrical and optical connection — Test methods — Part 316: Ozone resistance EN 3733-001, Aerospace series — Connector, optical , circular, single channel, coupled by self-locking ring, operating temperature up to 150 °C continuous — Part 001: Technical specification 1) EN 3745-100*, Aerospace series — Fibres and cables, optical, aircraft use — Test methods — Part 100: General ISO 1817, Rubber, vulcanized — Determination of the effect of liquids ISO 2574, Aircraft — Electrical cables — Identification marking IEC 60793-1-1, Optical fibres — Part 1-1: Measurement methods and test procedures — General and guidance IEC 60794-1-2, Optical fibre cables — Part 1-2: Generic specification — Basic optical cable test procedures IEC 60874-1, Connectors for optical fibres and cables — Part 1: Generic specification MIL-HDBK-454B, General guidelines for electronic equipment
* And all applicable parts quoted. 1) Published as ASD Prestandard at the date of publication of this standard. SIST EN 4532:2009
EN 4532:2009 (E) 5 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 3745-100 and the following apply. 3.1 batch of fibre a batch of fibre is defined as a continuous pull from a single identifiable preform 3.2 batch of cable a batch of cable is defined as all cable arising from one continuous extrusion and stranding operation on fibre from a single batch 4 Description 4.1 Construction of type 'A' primary fibre (Jacketed fibre) The cable shall consist of a single, step-index, multimode, all silica fibre (pure silica core with sufficiently high OH content to meet nuclear radiation hardening requirements) and suitably doped silica cladding which is protected by a primary coating. The cable shall have a tight buffer, all dielectric (non-conducting) construction and have an operating temperature range of − 60 °C to 150 °C. The primary fibre shall consist of core, cladding and primary coating. For a cable end view and side view drawing (3rd angle), see Figure 1.
Key 1 Buffer 2 Primary coating 3 Cladding 4 Core 5 Refractive index Figure 1 — Construction of type 'A' primary fibre
4.2 Construction of type 'B' single core cable The cable shall consist of a single, step-index, multimode, all silica fibre (pure silica core with sufficiently high OH content to meet nuclear radiation hardening requirements) and suitably doped silica cladding which is protected by a primary coating. The cable shall have a tight buffer, all dielectric (non-conducting) construction, with strength members and outer sheath, and have an operating temperature range of − 60 °C to 150 °C. The cable shall comprise an outer sheath, strength member, inner sheath, buffer, and fibre, which is protected by a primary coating. For a cable end view and side view drawing (3rd angle), see Figure 2. 1 2 3 4 5 SIST EN 4532:2009
EN 4532:2009 (E) 6
Key 1 Outer sheath 2 Inner sheath 3 Primary coating 4 Core 5 Cladding 6 Buffer 7 Strength member Figure 2 — Construction of type 'B' cable 5 Cable characteristics 5.1 Optical performance of cable 5.1.1 Optical isolation of cable jacketing
The cable jacketing shall provide sufficient optical isolation so that any possible ambient light pick up is not more than 1 nW over a length characteristic for the installed fibre-optic network. 5.1.2 Useful installed lifetime
The useful installed lifetime shall be ≥ 25 years. 5.1.3 Mean time between failure (MTBF) Cable failure rate of 0,02/100 m over 25 years life. 5.2 Construction data of cable (Type B) 5.2.1 Sheath colour The sheath shall be coloured light violet. 5.2.2 Cable design Tight buffer, all dielectric construction with strength members suitable for single connectors. 1 2 3 4 5 6 7 SIST EN 4532:2009
EN 4532:2009 (E) 7 5.3 Mechanical characteristics of cable (Type B) Minimum cable bend radius: during installation: ≥ 12 mm; installed long term (≥ 25 years): 30 mm. The installed cable shall have this narrow bending radius only over shorter distances, which shall add up to a total of not more than 200 mm per individual light path. 6 Fibre characteristics 6.1 Optical and material data of primary fibre 6.1.1 Fibre type All silica, step index exponent g > 30, multimode. Deviation from ideal step index profile at a relative core diameter of 0,90 shall be less than 4 % of refractive index difference nco − ncl. In the case of a structured cladding, the region adjacent to the core shall be a homogeneous cladding having an outer diameter of at least 1,15 × Dcore, wherein the refractive index variation nmax. − nmin. is ≤ 14 × 10-4. 6.1.2 Refractive index difference of core/cladding Test method according to IEC 60793-1-A1A. Refractive index difference between core/cladding Nco − Ncl = (20 ± 1,2) × 10-3 at a wavelength of 633 nm; this value refers to the mean value of Ncl in the depressed cladding. Step index g-factor g > 30. Outer diameter of inner cladding: DDinn.cladd ≥ 1,15 × Dcore. Refractive index homogeneity of inner cladding: nmax. − nmin. < 14 × 10-4. 6.1.3 Numerical aperture (Theoretical) Defined by nco − ncl based on a refractive index for pure silica, with high OH content, of 1,4571 at a wavelength of 633 nm (Helium neon laser). NAtheor = 0,24 ± 0,01. 6.1.4 Fibre core material composition The optical fibre is to be pure silica undoped. The UV-absorption of the fibre shall be measured close to absorption edge, using cut back technique with: fibre length = 4 m cut back to 1 m length, source λ = (220 ± 5) nm, α < 6,0 dB/m. 6.1.5 Cladding material composition The cladding material shall be suitable doped silica. Material analysis by micro probe or corresponding x-ray analysis. SIST EN 4532:2009
EN 4532:2009 (E) 8 6.2 Geometrical data of primary fibre and concentricity of primary coating To prevent microbending d1/d2 ≥ 0,9. Primary coatings shall be easily removable for splice fabrication and connector mounting and compatible with cabling and connector fitting processes. They shall provide a water barrier to ensure long lifetime in humid environments. See Figure 3.
Key 1 Primary coating 2 Fibre Figure 3 — Concentricity of primary coating 7 Environmental conditions 7.1 Temperature range The operating temperature shall be − 60 °C to 150 °C. 7.2 Operating pressure range The operating pressure range sh
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