1、STD-AECMA PREN 3708-001-ENGL L79b 1012311 OOLZL90 OTO = Edition approved for publication AECMA STANDARD NORME AECMA AECMA NORM C2 Chairman Comments should be sent within six months after the date of publication to prEN 3708-001 Edition P 2 November 1996 ICs : 49.060 PUBLISHED BY THE EUROPEAN ASSOCIA
2、TION OF AEROSPACE INDUSTRIES (AECMA) Guiledelle 94 - 8-1200 BRUXELLES - Tel. (32) 2 775 81 10 - Fax. (32) 2 775 81 11 Supersedes edition P 1 September 1995 Descriptors : Aircraft industry, connecting equipment, terminai strips, specifications, characteristics, tests, quality assurance, qualification
3、, testing conditions ENGLISH VERSION Aerospace series Modular interconnection systems Terminal junction systems Part O0 1 : Technical specification Srie arospatiale Luft- und Raumfahrt Systmes dinterconnexions modulaires Verteilersystem in modularer Bauweise Partie O01 : Spcification technique Barre
4、ttes de raccordement Vertefiermodule Teil 001 : Technische Lieferbedingungen This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA (The European Association of Aerospace Industries). It is published on green paper for the needs of AECMA-Members. It has been technica
5、lly approved by the experts of the concerned Technical Committee following comment by the Member countries. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identific
6、ation of the standard. After examination and signature of the AECMA Standard Checking Centre INPS) and formal agreement of the Official Services of the Member countries it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for formal vote. 1996-1 1-29 AECM
7、A Gulledelle 94 6-1 200 BRUXELLES Mr Pezzetta 1 I I aecma 19! - - Page 2 prEN 3708-001 : 1996 10 11 Contents list Scope Normative references Definitions Description Design Definition drawings and masses Tests Quality assurance Identification and marking Packaging Storage Page 3 3 4 5 6 6 6 14 18 18
8、18 STDnAECMA PREN 370-OOL-ENGL 199b LO12311 OOL2172 973 M Page 3 prEN 3708-001 : 1996 1 Scope This standard specifies the general characteristics of terminal junction systems for modular interconnection systems as well as test conditions, test programme and groups for quality assurance. It applies t
9、o products specially adapted to provide connections within a very reduced space for variable extendable, divisible, transformable and interchangeable combinations of equipment within a temperature range from - 55 OC to 175 OC, and for altitudes up to 21 O00 m for sealed modules or up to 13 700 m for
10、 unsealed modules. The conditions of use shall be in accordance with EN 2282. It also applies to interconnections incorporating components. 2 Normative references This European Standard incorporates by dated or undated reference provisions from other publications. These normative references are cite
11、d at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition
12、 of the publication referred to applies. EN 2266-002 EN 2282 EN 2591 * EN 3042 EN 3155-016 EN 3708-002 MI L-A-8 243D MIL-C-25769J MIL-L-7870A MIL-L-23699C MIL-STD-454M AS 124A TR 4257 Aerospace series - Cables, electrical, for general purpose - Operating temperature between - 55 OC and 200 OC - Part
13、 002 : General 1) Aerospace series - Characteristics of aircraft electrical supplies Aerospace series - Elements of electrical and optical connection - Test methods - General Aerospace series - Quality assurance - EN aerospace products - Qualification procedure Aerospace series - Electrical contacts
14、 used in elements of connection - Part O16 : Contacts, electrical, male 016, type A, crimp, class S - Product standard 2) Aerospace series - Modular interconnection systems - Terminal junction systems - Part 002 : Performance specification 1) Anti-icing and deicing-defrosting fluids 3) Cleaning comp
15、ound, aircraft surface, alkaline water base 3) Lubricating oil, general purpose, low temperature 3) Lubricating oil, aircraft turbine engine, synthetic base 3) Electronic equipment, standard general requirements for - Requirement 4 : Fungus - inert material 31 Fire-resistant phosphate ester hydrauli
16、c fluid for aircraft 4) Aerospace series - Elements of electrical and optical connection - Relationship between the numbering systems for parts of EN 2591 5) * 1 i Published as AECMA Prestandard at the date of publication of this standard 2) In preparation at the date of publication of this standard
17、 3) Published by : Department of Defense (DODI, the Pentagon, Washington, D.C. 20301 USA. 4) Published by : Society of Automotive Engineers, Inc. (SAE) 400 Commonwealth Drive, Warrendale, 5) Published as AECMA Technical Report at the date of publication of this standard Including all its parts quote
18、d PA 15096-001 USA. Page 4 prEN 3708-001 : 1996 3 Definitions For the purposes of this standard, the following definitions apply : 3.1 Modular interconnection system An arrangement permitting the interconnection of contacts according to a predetermined design. NOTE 1 : The female contacts are fitted
19、 in the module or extension piece and the male contacts are removable and crimped on. NOTE 2 : Climatic category and assembly are defined in EN 3708-002. 3.2 Assembly of associated removable modules with their components, which are also removable, assembled on a frame. Removable module terminal junc
20、tion system 3.3 Frame Generally metal parts of a specified shape constituting both the assembly system for removable modules and removable components and the mounting system for the whole. 3.4 Removable module Connector device composed of one or more groups of defined contacts, disposed inside an in
21、sulating box and connected together according to a predefined design. NOTE 1 : It can readily be positioned, repositioned or removed from the frame for ease of connection or modification of a terminal junction system. NOTE 2 : A removable module may be either of the feedback or feed-through type. 3.
22、4.1 Removable feedback module Module on which access to the contacts is on one face of the module only. 3.4.2 Removable feed-through module Module on which access to the contacts is on two opposite faces of the module. 3.5 Removable components Accessories generally associated with the module, such a
23、s end plates, module clamps, etc 3.6 Group of contacts Assembly of several contacts electrically interconnected. 3.7 Interconnection diagram Electrical arrangement of the group or groups of contacts within a modular interconnection system 3.8 Module clamp Appropriate device for mounting an assembly
24、of modules on a frame - STD-AECMA PREN 3708-001-ENGL 197b 1012311 OULZL7V 7qb Page 5 prEN 3708-001 : 1996 3.9 Insulator Removable wall of insulating material for insertion between two modules to provide supplementary insulation between them. 3.1 O Mounting carrier Device suitable for mounting one, t
25、wo or three modules 3.1 1 Device with one or more quick-release feed-through connections inside an insulating sleeve Connector - extension piece 3.1 2 Individual connector terminals Individual quick-release terminals generally used for earthing. 3.13 Earth module Module with a group of electrically
26、interconnected contacts and mounted with a bolt or a carrier and earthed by a metal plate 3.14 Removable feedback or feed-through modules, the contacts of which are electrically connected to one or more electrical components in different combinations. Modules for or with components 3.15 Devices with
27、 the same function as standard extension piece connectors except that components such as resistors, diodes, or fuses are incorporated in them. See also EN 2591. Connectors - extension pieces with components 4 Description A modular interconnection system comprises one or more insulating boxes fitted
28、with contacts, which may or may not be mounted in a support or frame in conformity with its product standard. Its cavities take crimped contacts as defined in EN 31 55-01 6 and, on request, blanking devices. 4.1 Products The products covered by this standard shall include : a) removable module termi
29、nal junction systems mounted on various supports or frames, in sealed and unsealed versions : I! feedback type; 2) feed-through type. b) frames with accessories for removable modules; c) mounting carriers for modules; d) connectors - extension pieces; e) individual terminals; f) earth modules; g) mo
30、dules for or with components; h) connectors - extension pieces with components. STD-AECMA PREN 3708-001-ENGL 177b 1012311 0012195 b82 = Page 6 prEN 3708-001 : 1996 4.2 Contacts See EN 31 55-01 6. Contacts exist in four sizes : 22, 20, 16, 12. Unsealed modules do not include contacts of sizes 16 and
31、12. 5 Design Materials not specified and not specially described shall be the lightest possible for the required application. When dissimilar metals are in close contact, adequate protection against corrosion shall be used for the electromotive force of the cell which shall not exceed 0,25 V. Insert
32、ion and extraction of contacts shall be through sockets located on the access surface or surfaces. If tools are necessary for insertion and extraction of contacts, their use shall not impair the product characteristics. 6 Definition drawings and masses The general dimensions and masses of the differ
33、ent components and the interconnection diagrams constituting a modular interconnection system are defined in the product standards. 7 Tests 7.1 General See table 1 Table 1 EN 2591-1 1 o1 102 20 1 Title Visual examination Examination of dimensions and mass Contact resistance - low level Details Initi
34、al examination : examination of components (modules, extension pieces, etc.), detached parts (contacts, mounting components, supports, etc.) Details to be examined : - identification; - appearance; - marking; - surface finish. See product standard The contact resistance shall not exceed the value sh
35、own in the table below. The values recorded shall be divided by two to give the contact resistance of one contact. Contact Ontact resistance I size I ma 1 I The relationship between the numerical numbering system and the former alphanumerical numbering system for parts of EN 2591 is given in TR 4257
36、. (co nti n ued ) STD-AECMA PREN 3708-001-ENGL 199b LO12311 ULZL7b 517 Page 7 prEN 3708-001 : 1996 Table 1 (continued) EN 2591- 202 Title Contact resistance at rated current r- ir Details See figures 1 and 2 The contact resistance shall not exceed the value shown in the table below. The values recor
37、ded shall be divided by two to give the contact resistance of one contact. I size I resistance I current Rated I Contact Contact 16 13 12 2 23 - Maximum sect ion 1 I I I I module I I Feedback L-,-J Figure 1 : Resistance test for feedback module Feed-throuah module Figure 2 : Resistance test for feed
38、-through module (continued STD-AECMA PREN 3708-001-ENGL L77b .I 10123L1 0012177 455 Contact size 22 20 16 12 Page 8 prEN 3708-001 : 1996 Current Duration A S 10,5 3 600 15 22 75 06 14 3 600 20 22 1 O0 O, 6 21 3 600 30 22 150 0,6 36 3 600 50 22 2 50 13 Table 1 (continued) EN 2591- 203 204 205 206 207
39、 208 209 21 o Title Electrical continuity at microvolt level Discontinuity of contacts in the microsecond range Housing (shell) electrical continuitv Measurement of insulation resistance Voltage proof test Temperature rise due to rated current Current temperature derating Electrical overload Details
40、 Not applicable Duration of micro-discontinuity : I 1 ps Method B Test time : throughout the duration of tests 402 and 403 Not applicable Method C Fully wired specimens. Insulation resistance at ambient temperature : 5 O00 MQ min. During test 303 and after test 304 : 100 MR min. During test 301 and
41、after tests 311, 314 and 315 : 1000MRmin. Method C Test voltage after tests 314 or 31 1 : - 1 500 V r.m.s. frequency 50 Hz, normal pressure; - 350 V r.m.s. frequency 50 Hz voltage at 14,7 kPa for unsealed modules; - 350 V r.m.s. frequency 50 Hz voltage at 4,67 kPa for sealed modules. The test voltag
42、e shall be applied between two adjacent insulated contacts. The maximum leakage current shall not exceed 2 mA. Not applicable See 4.2.1 of EN 3708-002. I Temperature Contact I Diagram I Supply points size number electric overload measurina ooint AO 1 A02 A03 A04 A05 A06 KL DU AY EX DY HP (continued
43、STDaAECMA PREN 3708-003-ENGL 399b m 30323LL 0032398 371 m Contact size Page 9 prEN 3708-001 : 1996 Diagram Supply points Temperature number electric overload measuring point Table 1 (continued) 20/12 Title Hybrid module, sizes 20 - 51 I HK F and 12 Details 303 iN 2591- Cold/low pressure and damp hea
44、t I interconnection diacirams 1 Contact size 20 - Module - or by extension of qualification for variants not presented at the first presentation, but only in cases where the technology and materials are identical: a) for sealed modules, only group 1 tests followed by tests EN 2591-303, 314 and 41 2
45、and group 5 tests are then performed; b) for unsealed modules, only group 1 tests followed by tests EN 2591 -304, 31 1 and 41 2 and the group 5 tests are then performed. STD-AECMA PREN 3708-003-ENGL L97b PI 303S3LL 0032204 415 = Test groups O 1 2 3 4 5 Page 15 prEN 3708-001 : 1996 Number of specimen
46、s 17 modules per size of contact and version Two modules per size of contact and version Two modules per size of contact and version Two modules per size of contact and version Two modules per size of contact and version One module per fluid, per size of contact and version 8.2.1 .l All sizes of con
47、tacts and all sizes of a module version, sealed or unsealed, and associated items. See tables 4 and 5. Sampling and definition of specimens Test group O 1 2 Number of specimens Four frames 1 m long or four mounting carriers of each type Four frames 0,3 m long or four mounting carriers of each type F
48、our frames 0,3 m long or four mounting carriers of each type 8.2.1.2 Preparation of specimens When qualifying a single diagram, the number of specimens shall be doubled for test groups 1 to 4. The specimens shall be mounted on a frame with module clamps fixed at a minimum torque of 1,5 N.m and maxim
49、um torque of 1,7 N.m, or on a mounting carrier except for group 5. For sealed versions, the modules shall be wired with round cable without roughness which could cause moisture or liquid to penetrate inside the module. The maximum and minimum size of cables shall be in accordance with EN 2266-002. 8.2.2 Frames or mounting carriers Qualification of a frame or mounting carrier is obtained when the specimens defined in 8.2.2.1 have satisfied the appropriate tests in groups O to 2 of table 7. 8.2.2.1 See table 5. Sampling and definition of specime
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