1、 STD-AECMA PREN 37Lb-OOL-ENGL 1797 D LU123LL 0033227 782 AECMA STANDARD prEN 37 1 6-00 1 NORME AECMA Edition P 1 AECMA NORM May 1997 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Gulledelle 94 - 8-1200 BRUXELLES - Tel. (32) 2 775 81 10 - Fax. (32) 2 775 81 11 ICs : 49.060 Edi
2、tion approved for publication 1997-05-30 Descriptors : C2 Chairman Comments should be sent within six months after the date of publication to Gulledelle 94 AECMA Mr Pezzetta 8-1 200 BRUXELLES ENGLISH VERSION Aerospace series Connector, single-way, with triaxial interface, for transmission of digital
3、 data Part O01 : Technical specification Srie arospatiale Luft- und Raumfahrt Connecteur, monovoie, Steckverbinder, triaxial avec interface triaxial, pour transmission de donnes numriques Partie O01 : Spcification technique fr digitale Datenbertragung in einer Richtung Teil O01 : Technische Lieferbe
4、dingungen 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 technically approved by the experts of the concerned Technical Committee fo
5、llowing 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-identification of the standard. After examination and signature of the AECMA
6、 Standard Checking Centre INPSI 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. STD-AECMA PREN 373b-003-ENGL 3777 I LOL2333 0033230 4T4 I Page 2 prEN 3716-001 : 19
7、97 I Contents list 1 2 3 4 5 6 7 8 9 10 11 Scope Normative references Definitions Description Design Definition drawings and masses Tests Quality assurance Designation and marking Packaging Packing 12 Storage Page 3 3 4 4 4 4 9 14 17 18 18 18 STD-AECMA PREN 374b-1-ENGL L777 3032331 0033233 330 H Pag
8、e 3 prEN 3716-001 : 1997 1 Scope This standard applies to single-way connectors with triaxial interfaces used in the transmission of digital data, with the two-core shielded cables in accordance with EN 3375-003, EN 3375-004 and EN 3375-005. This standard defines the general characteristics of conne
9、ctors with screw couplings usable up to a frequency of 5 MHz. It specifies the conditions of qualification, acceptance and quality assurance. It defines the test programmes and groups. Temperature class : - 65OC to 150C 2 Normative references This European Standard incorporates by dated or undated r
10、eference provisions from other publications. These normative references are cited 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 incorp
11、orated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN2591 * EN 3042 EN 3155-001 EN 3375-003 EN 3375-004 EN 3375-005 MIL-A-8243D MIL-C-87936 M I L-H -5 606 E MIL-L-7808H MIL-L-23699C MIL-STD-454 MI L-T-56 24L FED-STD-H28 Aerospace
12、series - Elements of electrical and optical connection - Test methods - General Aerospace series - Quality assurance - EN aerospace products - Qualification procedure Aerospace series - Electrical contacts used in elements of connection - Part O01 : Technical specification 1) Aerospace series - Cabl
13、es, electrical, for signal data transmissions - Part 003 : Cable, bifilar, double-braid - Product standard 2) Aerospace series - Cables, electrical, for signal data transmissions - Part 004 : Cable, bifilar, singie-braid - Product standard 2) Aerospace series - Cables, electrical, for signal data tr
14、ansmissions - Part 005 : Cable, bifilar, double-braid, high immunity - Product standard 2) Anti-icing and deicing-defrosting fluids 3) Cleaning compounds, aircraft exterior surfaces, water diluable 3) Hydraulic fluid, petroleum base, aircraft, missile and ordnance 3) Lubricating oil aircraft turbine
15、 engine, synthetic base, NATO code number 0-1 48 3) Lubricating oil, aircraft turbine engine, synthetic base 3) Electronic equipment, standard general requirements for 3) Turbine fuel, aviation, grades JP-4, JP-5 and JP-5/JP-8 ST 3) Screw thread standards for federal services 3) * Including ail its
16、parts quoted 1) Published as AECMA Prestandard at the date of publication of this standard 2) In preparation at the date of publication of this standard 3) Published by : Department of Defense (DOD), the Pentagon, Washington D.C. 20301 USA. STD*AECMA PREN 373b-OO3-ENGL 3797 1012311 0033232 277 M Pag
17、e 4 prEN 371 6-001 : 1997 3 Definitions For the purposes of this standard, the definitions given in EN 2591 and EN 31 55-001 apply. 4 Description The triaxial connectors are the solder or crimp contact type, with mechanical end stop. The coupling system is the screw type ; at the end of coupling the
18、 housings are mechanically stopped. 4.1 Receptacle Fixing is by nut, anti-vibration washer and gasket seal. 4.2 Plug The knurled coupling ring mounted permanently on the plug allows the connectors to be coupled and decoupled. 4.3 Materials and surface treatment When dissimilar metals are in close co
19、ntact, adequate protection against corrosion shall be used to ensure that the electro-chemical potential difference does not exceed 0,25 V. 4.3.1 Housing Copper alloy, tin plated. 4.3.2 Contact Copper alloy, gold-plated over an appropriate undercoat. 4.3.3 Insert The materials used shall have electr
20、ical and mechanical characteristics compatible with the required use. 4.3.4 Ferrule Material identical to that used for housing. 5 Design The insert is not removable. It is retained mechanically in the housing. The fronts of the inserts are designed to guarantee the seal when the connectors are mate
21、d. 6 Definition drawings and masses The general definition drawings and masses of the receptacles, plugs and flight caps are given in the product standards. STD.AECMA PREN 37Lb-001-ENGL 1997 m LOL23Ll 0033233 Ln3 m 1,55 * 0.70 I I I Page 5 prEN 3716-001 : 1997 End of pin contact 6.1 Receptacle matin
22、g dimensions 6.1.1 With socket contact See figures 1 and 2. Dimensions and tolerances are in millimetres. 2,28 * 0.60 I 8,80 min. I - - I Point of contact with a flat-ended pin # 1,850 2 0,005 I U *I5 - Il.40 I I -.- , I I 11.35 min. - I Figure 1 0,254 min. I I End of socket contact 0,450 max. 1: 1
23、I Reference plane 0 4 compatible with intermediate pin Figure 2 Page 6 prEN 3716-001 : 1997 0,254 min. I I 6.1.2 With pin contact See figure 3. Dimensions and tolerances are in millimetres. End of insulator Point of contact with flat-ended oin general appearance. Final examination : no loosening of
24、parts, no cracking, no wear affecting the function, no part detached. As per 6 and product standard Test applicable to central and intermediate contacts. Measurement points on the cable as close as possible to the contacts, depending on the configuration of the test assemblies. Cable type : EN 3375-
25、003, EN 3375-004 and EN 3375-005 Max. contact resistance Contact Initial Initial After test After tests 40 (continued) STD-AECMA PREN 371b-ODL-ENGL 1777 1012311 0013238 775 Contact Current A Central 1 Intermediate 1 External 10 Max. contact resistance ImR) 25 0C+30C-00C 150 OC + 3 OC-O OC Initial Af
26、ter test After test 35 40 80 35 40 80 8 10 15 Page 10 prEN 3716-001 : 1997 Table 1 (continued) Title I Details EN 2591- Contact resistance at rated current Measurement point on cable as close as possible to the contacts, depending on the configuration of the test assemblies. Cable type : EN 3375-003
27、, 202 Electrical continuity at microvolt level Discontinuity of contacts in the microsecond range Not applicable 203 Duration of drop-out : 100 ns Method B Test carried out during tests : 301, 402, 403 204 205 Housing (shell) electrical continuity Not applicable Measurement of insulation resistance
28、206 Method A, connectors unmated Minimum insulation resistance between central contact and intermediate contact and external contact : At ambient : 5 O00 MC2 At 150 OC : 1 O00 MO After tests : 100 MC2 connectors mated Voltage proof test Method A Voltage strength at sea level : 900 V r.m.s. voltage b
29、etween central contact and intermediate contact and external contact. Voltage strength at altitude : 200 V r.m.s. Pressure : 4,8 kPa (21 O00 m) Leakage current : 1 mA 207 Temperature rise due to rated current Not applicable 208 Not applicable 209 Current temperature derating Electrical overload 210
30、Not applicable 21 2 Surface transfer impedance Applicable (Test method under revision) Not applicable 213 Shielding effectiveness from 100 MHz to 1 GHz 21 6 Engagement of contacts Endurance at temperature Not applicable Method B Temperature : 150 OC + 3 OC / - 3 OC Duration : 1 O00 h Measurements du
31、ring test : 206 204 in the last hour. 30 1 (continued) STD-AECMA PREN 371b-001-ENGL 1777 1012311 0013239 b21 Page 11 prEN 3716-001 : 1997 Table 1 (continued) Title Details :onnectors mated Wiring of contacts with EN 3375-003, EN 3375-004 ind EN 3375-005 cable ry heat 309 : 150 OC -ow air pressure 31
32、 1 : 4,7 kPa Measurement during dry heat nsulation resistance 206 : 1 O00 MR min. lot applicable Vot applicable hld 310 : - 65 OC limatic sequence :old/low pressure and damp heat i 3amp heat steady state 3apid change of temperature :onnectors wired up and mated TA = 150 OC T, = - 65 OC Duration : 30
33、 min Mould growth Method A Duration : 28 d No development The connectors shall be suspended in the test chamber by non-metallic cords, so that there is no accumulation of condensed solution. The connectors shall be subjected to 50 mating and demating cycles at a rate which shall not be more than 5 c
34、ycles /min : they shall be then exposed to the salt mist : Mated for 452 h, then Unmated for 48 h. After exposure to the salt mist, the connectors arc subjected to 450 mating cycles at the rat indicated above. Salt mist Sand and dust 1 cycle Wind speed = (3,5 f. 0,5) m/s Not applicable (see 302) Not
35、 applicable (see 302) Dry heat 1 Cold Not applicable (see 302) Low air pressure Air leakage Method B 0,5 cmVs Not applicable Driving rain (artificial) Immersion at low air pressure Fluid resistance Pressure : 4,7 kPa Fluid types : see table 2 Applicable Ozone resistance Flammability Connectors mated
36、 : method A Not applicable Fire resistance Gas-tightness of solderless wrapped connections Not applicable (continued) STD-AECMA PREN 371b-003-ENGL 3997 H 1132311 1033240 343 = Title Simulated solar radiation at ground level Page 12 prEN 3716-001 : 1997 Details Not applicable EN 2591- 320 321 322 323
37、 324 40 1 402 403 404 405 406 407 408 409 410 41 1 41 2 41 3 41 4 41 5 41 6 Mechanical endurance Durability of contact retention system and seals (Maintenance ageing) , Number of operations : 500 The rate shall not be more than 5 cycles/min. Not applicable Damp heat, cyclic test I Not applicable (se
38、e 302) Mating and unmating forces Hermeticity Thermal shock Interfacial sealing Acceleration, steady state Mating torque = 1 + 0,25 / - O Nm Unmating torque 1,35 Nm Not applicable Not applicable Not applicable Not applicable Contact retention in insert Insert retention in housing (axial) Shock Force
39、 : 45 N Max. displacement : 0,8 mm Not applicable Sinusoidal and random vibrations Insert retention in housing (torsional) Contact insertion and extraction forces in and out of insert Holding force of grounding spring system Unmating of lanyard release connectors Test probe damage (female contact) C
40、ontact bending strength Mated and wired connectors Method A Severity 100 Number of shocks : three successive shocks = 18 shocks in total Mated and wired connectors Method B figure 3, level E Duration of test : 16 h - 8 h in the longitudinal axis and 8 h in the direction perpendicular to that axis. D
41、uring the test, in the last hour : 204. Test temperature : 23 OC + 5 OC / - 5 OC _ _ _ Not applicable Not applicable Not applicable Not applicable Not applicable Not applicable Transverse load (external bending Applicable moment) I TBA Axial load I Not applicable I i Title Tensile strength (crimped
42、connection) Gauge insertion and extraction forces in and out of a female contact 1 Details Applicable to crimp (see product standard) STD-AECMA PREN 37Lb-OOL-ENGL 1777 = LOL23LL UOL324L 28T Page 13 prEN 3716-001 : 1997 Stability of male contacts in insert Mechanical strength of rear accessories Stri
43、pping force, solderless wrapped connections Unwrapping, solderless wrapped connections Contact retention system effectiveness (removable contact walkout) Robustness of protective cover attachment Soft soldering Restricted entry Residual magnetism Contact protection effectiveness (scoop-proof) Use of
44、 tools Measurement of thickness of coating on contacts Adhesion of coating on contacts Recommendation to check effectiveness of non removable fixing of hermeticity sealed connector shell Magnetic permeability Vot applicable Vot applicable Not applicable Not applicable Not applicable Applicable Appli
45、cable (Contact with self-contained flux and solder) Not applicable Non applicable Not applicable Not applicable Applicable Applicable Not applicable Not applicable I STD*AECMA PREN 371b-001-ENGL 3777 = 1032313 0033242 3Lb Immersion temperature OC Page 14 prEN 3716-001 : 1997 Stoving temperature OC T
46、able 2 Fuel Mineral hydraulic fluid Synthetic lubricant Cleaning products De-icing fluid Category M IL-T-5624L 25 65 (J P4/JP5 MIL-H-5606E 85 65 MIL-L-23699C 120 65 MI L-L-7 808H 120 65 MIL-C-87936 65 65 Isopropanol 25 65 Methanol 25 65 Ethanol 25 65 MIL-A-8243D 65 65 Fluid Title GROUP O Visual exam
47、ination (initial) Examination of dimensions and mass Contact resistance - low level Contact resistance at rated current References EN 2591- Remarks 101 All specimens 102 201 202 8 Quality assurance 8.1 General See EN 3042. 8.2 Qualification conditions Qualification is obtained when the specimens def
48、ined in 9.2.1 ave passed the tests in groups O to 9. 8.2.1 Two samples per group. Except for group 4 : one pair per family = 10 pairs. Sampling and definition of specimens 8.2.2 Preparation of specimens The specimens are wired up with EN 3375-003, EN 3375-004 and EN 3375-005 cable. i 1 Title GROUP 1
49、 Rapid change of temperature Mating and unrnating forces Immersion at low air pressure Measurement of insulation resistance Voltage proof test Salt spray Mating and unmating forces Contact resistance at rated current Visual examination GROUP 2 Climatic sequence Transverse load (external bending moment) Mating and unmating forces Measurement of insulation resistance Voltage proof test Contact resistance - low level Contact retention in insert Visual examination (final) GROUP 3 Mechanical endurance Mating and
