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 prEN 4532:20052 Foreword This standard
7、 was reviewed by the Domain Technical Coordinator of ASD-STANs Electrical Domain. After inquiries and votes 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 ref
8、erences 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 5.1.1 Optical isolation of cable jacketing . 6 5.1.2 Useful installed lifet
9、ime. 6 5.1.3 Mean time between failure (MTBF). 6 5.2 Construction data of cable (Type B). 6 5.2.1 Sheath 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 Refractiv
10、e index difference of core/cladding . 7 6.1.3 Numerical aperture (Theoretical) 7 6.1.4 Fibre core material 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 Ope
11、rating pressure range 8 7.3 Humidity 8 7.3.1 Operating humidity. 8 7.3.2 Storage humidity. 8 7.4 Nuclear radiation. 8 8 Production acceptance (routine) tests 9 8.1 General. 9 prEN 4532:20053 8.1.1 Measurement conditions 9 8.1.2 Recovery conditions . 9 8.1.3 Declaration of design and performance . 9
12、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) tests 11 8.4 Group D qualification approval tests (cable type B) 12 9 Additional test inform
13、ation 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 Designat
14、ion 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 length 17 10.6 Storage reel 17 prEN 4532:20054 1 Scope This standard covers two cable types, Ty
15、pe 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
16、 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 applie
17、s. 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 Te
18、st 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 T
19、est methods 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
20、 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-454A, General guidelines for electronic equipment. * And all applicable parts quoted 1) Published as AECMA Prestandard at the date of pu
21、blication of this standard. 2) In preparation at the date of publication of this standard. prEN 4532:20055 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
22、 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
23、, 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) constructio
24、n and have an operating temperature range of 60 C to 150 C. The primary fibre shall consists 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
25、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 p
26、rimary 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 pr
27、otected by a primary coating. For a cable end view and side view drawing (3rd angle), see Figure 2. 1 2 3 4 5 prEN 4532:20056 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 per
28、formance 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
29、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 s
30、trength members suitable for single connectors. 1 2 3 4 5 6 7 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 di
31、stances, 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,
32、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 inde
33、x difference of core/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: D
34、Dinn.cladd 1,15 Dcore. 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 F
35、ibre 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 = 220 nm 5 nm. 6,0 dB/m 6.1.5 Cladding material composition The c
36、ladding material shall be suitable doped silica. Material analysis by micro probe or corresponding x-ray analysis. prEN 4532:20058 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 fabri
37、cation 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 Temperatur
38、e range The operating temperature shall be 60 C to 150 C. 7.2 Operating pressure range The operating pressure range shall 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
39、to an operative relative humidity which may approach 100 % at medium or lower temperatures. 7.3.2 Storage humidity Relative 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 2prEN 4532:20059 8 Product
40、ion 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, recovery conditions for the interval after a conditioning test shall be as s
41、tated 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 Declaration of Design and Performance (DDP) including test results shall be submitted
42、 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 and B) Comprising core, cladding, and primary coating to be measured at each
43、end of a fibre batch. See Table 1. 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 3745-202 200 m 3 m e.g. using a calibrated optical microscope Non circularity of core EN 3745-202 2,5 m Fibre cl
44、adding diameter EN 3745-202 278 m 2 m e.g. using a calibrated optical microscope Non circularity of cladding EN 3745-202 2,0 m Concentricity error of fibre core/cladding EN 3745-202 1 m 1 m e.g. using a calibrated optical microscope Fibre proof test IEC60793-1-B1 Ambient conditions; 65 N. 100 % of f
45、ibre to be tested. 65 N at fibre which is equivalent to 1,4 % strain at the fibre. Fibre attenuation EN 3745-301 Fibre attenuation loss 15,0 dB/km. Full launch technique. Launching fibre specification: Length = 220 m 20 m. R = 150 mm. Coupling with micro manipulators. Fibre length = 200 m min. Cut-b
46、ack = 2 m to 3 m. Source = 810 nm 40 nm. 8.2.3 Completed cable (Type B) See Table 2. prEN 4532:200511 Table 2 Acceptance tests on completed cable (for cable type B) Test Test method Test performance/conditions/criteria Cable sheath outside diameter EN 3745-203 2,5 mm 0,15 mm. Cable sheath wall thick
47、ness EN 3745-203 0,2 mm minimum. To be measured at both ends of each batch. Optical cable attenuation EN 3745-301: Method A Cable fibre attenuation: 20 dB/km Launching fibre specification: Length = 220 m 20 m. R = 150 mm. Coupling with micro manipulators. Test sample fibre length = 200 m min. Cut-ba
48、ck = 2 m to 3 m. Source = 810 nm 40 nm. Temperature cycling: EN 3745-402 a) Optical attenuation test EN 3745-301: Method C 10 m of sample length shall be subjected to 10 cycles between 60 C and 150 C. 10 m of the sample shall be loosely coiled within the chamber with radius of R = 150 mm. 0,5 dB max
49、. during cycling. One cycle shall consist of 30 min. at 60 C and 60 min. of heating period to reach 150 C; 30 min. at 150 C and 60 min. of cooling to 60 C. Recovery within 1 h at ambient temperature to 0,2 dB. Measurements shall be made at = (810 30) nm and the overfilled launch conditions shall be in accordance with 9, using the test arrangement illustrated in Figur
