1、ASD STANDARD NORME ASD ASD NORM prEN 4532 Edition P 1 October 2005 PUBLISHED BY THE AEROSPACE AND DEFENSE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATION Gulledelle 94 - B-1200 Brussels - Tel. + 32 2 775 8126 - Fax. + 32 2 775 8111 - www.asd-stan.orgICS: 49.060 Descriptors: ENGLISH VERSION Aerosp
2、ace series Cables, optical, single core 200 m/280 m fibre, 2,5 mm outer jacket Technical specification Srie arospatiale Cbles, optiques, fibre 200 m/280 m, diamtre extrieur 2,5 mm Spcification technique Luft- und Raumfahrt LWL-Kabel, 200 m/280 m Faser, 2,5 mm Aussendurchmesser Technische Lieferbedin
3、gungen This “Aerospace Series“ Prestandard has been drawn up under the responsibility of ASD-STAN (The European Association of Aerospace Industries - Standardization). It is published for the needs of the European Aerospace Industry. It has been technically approved by the experts of the concerned D
4、omain following member comments. Subsequent to the publication of this pre-standard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identification of the standard. After examination and review by users and formal ag
5、reement of ASD-STAN, it will be submitted as a draft European Standard (prEN) to CEN (European Committee for Standardization) for formal vote and transformation to full European Standard (EN). The CEN national members have then to implement the EN at national level by giving the EN the status of a n
6、ational standard and by withdrawing any national standards conflicting with the EN. Edition approved for publication 31 October 2005 Comments should be sent within six months after the date of publication to ASD-STAN Electrical Domain Copyright 2005 by ASD-STAN Copyright Association Europeene des Co
7、nstructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 4532:20052 Foreword This standard was reviewed by the Domain Technical Coordinator of ASD-STANs Electrical Domain. After inquiries and v
8、otes carried out in accordance with the rules of ASD-STAN defined in ASD-STANs General Process Manual, this standard has received approval for Publication. Contents Page 1 Scope . 4 2 Normative references 4 3 Terms and definitions . 5 4 Description 5 4.1 Construction of type A primary fibre (Jackete
9、d fibre) 5 4.2 Construction of type B single core cable 5 5 Cable characteristics . 6 5.1 Optical performance of cable. 6 5.1.1 Optical isolation of cable jacketing . 6 5.1.2 Useful installed lifetime. 6 5.1.3 Mean time between failure (MTBF). 6 5.2 Construction data of cable (Type B). 6 5.2.1 Sheat
10、h colour . 6 5.2.2 Cable design 6 5.3 Mechanical characteristics of cable (Type B) 7 6 Fibre characteristics. 7 6.1 Optical and material data of primary fibre. 7 6.1.1 Fibre type. 7 6.1.2 Refractive index difference of core/cladding . 7 6.1.3 Numerical aperture (Theoretical) 7 6.1.4 Fibre core mater
11、ial composition. 7 6.1.5 Cladding material composition 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 7.3.1 Operating humidity. 8 7.3.2 Storage humidity. 8 7.4 Nuclea
12、r radiation. 8 8 Production acceptance (routine) tests 9 8.1 General. 9 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 4532:20053 8.1.1 Measureme
13、nt conditions 9 8.1.2 Recovery conditions . 9 8.1.3 Declaration of design and performance . 9 8.2 Group A Production acceptance (routine) tests. 9 8.2.1 Acceptance tests. 9 8.2.2 Primary fibre (for cable types A and B) 9 8.2.3 Completed cable (Type B). 10 8.3 Group B production verification (quality
14、) 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 f
15、or 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 10.3.1 General 16 10.3.2 Requirements for packaging and labelling . 16 10.4 Ordering information 17 10.5 Cable l
16、ength 17 10.6 Storage reel 17 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 4532:20054 1 Scope This standard covers two cable types, Type A and
17、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 compartm
18、ents. 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 un
19、dated 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 method
20、s 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 metho
21、ds Part 100: General. 2)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
22、: Generic specification Basic optical cable test procedures. IEC 60874-1, Connectors for optical fibres and cables Part 1: Generic specification. MIL-HDBK-454A, General guidelines for electronic equipment. * And all applicable parts quoted 1) Published as AECMA Prestandard at the date of publication
23、 of this standard. 2) In preparation at the date of publication of this standard. Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 4532:20055 3 Ter
24、ms 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 fr
25、om 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 ra
26、diation 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 consists of core, cladding a
27、nd 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, mu
28、ltimode, 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
29、 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 Co
30、pyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 4532:20056 Key 1 Outer sheath 2 Inner sheath 3 Primary coating 4 Core 5 Cladding 6 Buffer 7 Strength
31、 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 characterist
32、ic 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 colou
33、red 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 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networ
34、king permitted without license from IHS-,-,-prEN 4532:20057 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 sha
35、ll 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 t
36、han 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 co
37、re/cladding Test method according to IEC60793-1-A1A. Refractive index difference between core/cladding Nco Ncl= (20 1,2) 10-3at a wavelength of 633 nm; this value refers to the mean value of Nclin the depressed cladding. Step index g-factor g 30. Outer diameter of inner cladding: DDinn.cladd 1,15 Dc
38、ore. Refractive index homogeneity of inner cladding: nmax- nmin. 14 10-4. 6.1.3 Numerical aperture (Theoretical) Defined by nco nclbased 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
39、 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 = 220 nm 5 nm. 6,0 dB/m 6.1.5 Cladding material composition The cladding material s
40、hall be suitable doped silica. Material analysis by micro probe or corresponding x-ray analysis. Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 4
41、532:20058 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 bar
42、rier 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 shall
43、 be 2 000 mbar to 11 mbar. 7.3 Humidity 7.3.1 Operating humidity Equivalent to a water content of equipment cooling air max. 27 g H2O per 1 kg air. This water content corresponds to an operative relative humidity which may approach 100 % at medium or lower temperatures. 7.3.2 Storage humidity Relati
44、ve humidity max. 75 %. 7.4 Nuclear radiation After a down-time of 1 msec the induced attenuation is 15 dB/km at T = 24 C and 82 dB/km at T = 60 C d1 d21 2Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or
45、 networking permitted without license from IHS-,-,-prEN 4532:20059 8 Production acceptance (routine) tests 8.1 General 8.1.1 Measurement conditions Unless otherwise specified, all tests shall be carried out under standard atmospheric conditions. 8.1.2 Recovery conditions Unless otherwise specified,
46、recovery conditions for the interval after a conditioning test shall be as stated in the relevant test method. 8.1.3 Declaration of design and performance The qualification approval tests are listed in 8.2, 8.3 and 8.4. At satisfactory conclusion of qualification, a preliminary or a formal Declarati
47、on of Design and Performance (DDP) including test results shall be submitted to the approving authority. 8.2 Group A Production acceptance (routine) tests 8.2.1 Acceptance tests The acceptance tests shall be carried out routinely during F.O. cable production. 8.2.2 Primary fibre (for cable types A a
48、nd B) Comprising core, cladding, and primary coating to be measured at each end of a fibre batch. See Table 1. Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 4532:200510 Table 1 Acceptance tests on primary fibre (for cable types A and B) Test Test method Test performance/conditions Fibre core diameter EN 3745-202 2
