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1、BRITISH STANDARD AEROSPACE SERIES BS G 253:1995 ISO 8668-3: 1994 Specification for Type 1 terminal junction systems Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:39:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS G 253:1995 This British Standard, having be
2、en prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 May 1995 BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference ACE/6 Draft for comment 92/83129 DC ISBN 0
3、580 24045 2 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee ACE/6, Aerospace anionic electrical and fibre-optic technology, upon which the following bodies were represented: British Airways British Cable Makers Confederat
4、ion British Rubber Manufacturers Association Civil Aviation Authority (Airworthiness Division) Federation of the Electronics Industry Ministry of Defence Society of British Aerospace Companies Ltd. Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University,
5、London South Bank University, Sat Dec 09 02:39:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS G 253:1995 BSI 01-2000i Contents Page Committees responsibleInside front cover National forewordii 1Scope1 2Normative references1 3Definitions1 4Designation1 5Characteristics3 6Tooling16 7Production testi
6、ng and quality control16 Figure 1 Feedback module3 Figure 2 Feedthrough module4 Figure 3 Frame for feedback module: Standard frame P15 Figure 4 Frame for feedback module: Perforated frame P25 Figure 5 Frame for feedback module: Reinforced frame P36 Figure 6 Frame for feedthrough module: P46 Figure 7
7、 Module clamps for feedback modules (code 1)7 Figure 8 Module clamps and inserts for feedthrough modules (code 2)7 Figure 9 Contact, size 228 Figure 10 Contact, size 209 Figure 11 Detail of the crimping shank of the size 16 contact9 Figure 12 Detail of the crimping shank of the size 12 contact9 Figu
8、re 13 Sealing plug10 Figure 14 Assembly diagram11 Figure 15 Size A modules11 Figure 16 Size B modules12 Figure 17 Size C modules14 Figure 18 Hybrid interconnection diagram for size C modules15 Figure 19 Size D modules15 Table 1 Code for resistance to fluids1 Table 2 Coding of the protection of frame
9、s2 Table 3 Feedback modules3 Table 4 Feedthrough modules4 Table 5 Frames for feedback modules (types P1 and P2)5 Table 6 Frames for feedback modules (type P3)6 Table 7 Frames for feedthrough modules (type P4)6 Table 8 Contacts10 Table 9 Sealing plugs11 Table 10 Size A modules12 Table 11 Size B modul
10、es13 Table 12 Size C modules14 Table 13 Size D modules15 Table 14 Connection wires16 List of referencesInside back cover Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:39:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS G 253:1995 ii BSI 01-2000 National for
11、eword This British Standard has been prepared by Technical Committee ACE/6. It is identical with ISO 8668-3:1994, Aircraft Terminal junction systems Part 3: Detail specification for type 1 system, published by the International Organization for Standardization (ISO). Cross-references The Technical C
12、ommittee has reviewed the provisions of ISO 8668-1:1986, ISO 8668-2:1986 and Mil-I-81969:1982, to which normative reference is made in the text, and has decided that they are acceptable for use in conjunction with this standard. A British Standard does not purport to include all the necessary provis
13、ions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 18, an
14、 inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:39:12 G
15、MT+00:00 2006, Uncontrolled Copy, (c) BSI BS G 253:1995 BSI 01-20001 1 Scope 1.1 This part of ISO 8668 specifies the particular characteristics of a terminal junction system (TJS), designated as type 1 and intended for use at temperatures between 55 C and + 155 C. 1.2 The junction systems covered by
16、 this part of ISO 8668 comprise: a) feedback modules in four sizes; b) feedthrough modules in four sizes; c) frames adapted to these modules: standard frame P1, perforated frame P2 or frame P3 for feedback modules; solid frame P4 for feedthrough modules; d) module clamps and inserts; e) removable id
17、entification tags; f) removable male crimp contacts of sizes 22, 20, 16 and 12; g) sealing plugs. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO 8668. At the time of publication, the editions indicate
18、d were valid. All standards are subject to revision, and parties to agreements based on this part of ISO 8668 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid Internationa
19、l Standards. ISO 8668-1:1986, Aircraft Terminal junction systems Part 1: Characteristics. ISO 8668-2:1986, Aircraft Terminal junction systems Part 2: Tests. MIL-I-81969:1982, Connector and electrical contact General specification for installing and removal tools. 3 Definitions For the purposes of th
20、is part of ISO 8668, the definitions given in ISO 8668-1 apply. See also IEC 50(581):1978, International Electrotechnical Vocabulary Chapter 581: Electromechanical components for electronic equipment. 4 Designation 4.1 Modules The modules shall be designated as follows: a) reference to this part of
21、ISO 8668; b) separated by a space, a figure indicating the type of module: 1 = feedback module, 2 = feedthrough module; c) a letter indicating the size of module: A, B, C or D (see Figure 1 and Figure 2); d) three figures indicating the interconnection diagram (see 5.2); e) a letter defining resista
22、nce to fluids (see Table 1). Table 1 Code for resistance to fluids EXAMPLE The designation of a size A feedback module with 21 contacts of size 22, arranged according to interconnection diagram 101 and resistant to fluids defined by code A is as follows: Feedback module ISO 8668-3 1 A 101 A FluidsCo
23、de Synthetic oil for turbine aero engines Mineral oil for turbine aero engines Kerosene for turbine aero engines A Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:39:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS G 253:1995 2 BSI 01-2000 4.2 Frames The fram
24、es shall be designated as follows: a) reference to this part of ISO 8668; b) separated by a space, a figure indicating the type of module for which the frame is designated: 1 = feedback modules, 2 = feedthrough modules; c) a letter indicating the type of frame: P1 = standard solid frame for feedback
25、 modules; P2 = perforated frame for feedback modules; P3 = reinforced frame for feedback modules; P4 = full frame for feedthrough modules. d) three-figure code indicating the length of the frame, in millimetres; e) separated by a hyphen, a figure indicating the nature of the protection of the frame
26、(see Table 2). Table 2 Coding of the protection of frames EXAMPLE The designation of a perforated frame for 100 mm long feedback modules, protected by black anodic oxidation, is as follows: Perforated frame ISO 8668-3 1 P2 100 3 4.3 Module clamps and inserts Module clamps and inserts shall be design
27、ated as follows: a) reference to this part of ISO 8668; b) separated by a space, two letters and one figure indicating the type of module clamp or insert: SR1 and SR2 for feedback modules; ST1 and ST2 for feedthrough modules. EXAMPLE The designation of a module clamp for a feedback module is as foll
28、ows: Module clamp ISO 8668-3 SR1 4.4 Contacts The contacts shall be designated as follows: a) reference to this part of ISO 8668; b) separated by a space, the two-figure code: 22, 20, 16 or 12 indicating the size of contact. EXAMPLE The designation of a contact of size 22 is as follows: Contact ISO
29、8668-3 22 4.5 Sealing plugs Sealing plugs shall be designated as follows: a) reference to this part of ISO 8668; b) separated by a space, a two-figure code: 01, 02, 03 or 04 (see Table 9). ProtectionCode White cadmium plating Colourless anodic oxidation Black anodic oxidation Yellow anodic oxidation
30、 Stainless steel 1 2 3 4 5 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:39:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS G 253:1995 BSI 01-20003 EXAMPLE The designation of a sealing plug for size 22 contact cavities is as follows: Sealing plug ISO 8668-
31、3 01 5 Characteristics 5.1 Dimensional characteristics The dimensions are given in millimetres. In the figures and in certain tables, values in inches are given in parentheses. Drawings are shown in the first angle. 5.1.1 Feedback modules (code 1) See Figure 1 and Table 3. Table 3 Feedback modules F
32、igure 1 Feedback module Dimensions in millimetres Size of module A B CDEFGHJ max. 0,1 A21,61021,824,8861,51,53 B201021,824,8861,51,53 C25122324,8861,51,53 D25152424,8861,51,53 Dimensions in inches Size of module A B CDEFGHJ max. 0,004 A0,850,3930,8580,9760,3140,2360,0590,0590,118 B0,7870,3930,8580,9
33、760,3140,2360,0590,0590,118 C0,9840,4720,9050,9760,3140,2360,0590,0590,118 D0,9840,590,9440,9760,3140,2360,0590,0590,118 0 0,3 + 0,1 0,2 0 0,2 0 0,2 + 0,2 0 0 0,011 + 0,004 0,008 0 0,008 0 0,008 + 0,008 0 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:39:12
34、GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS G 253:1995 4 BSI 01-2000 5.1.2 Feedthrough modules (code 2) See Figure 2 and Table 4. Table 4 Feedthrough modules Figure 2 Feedthrough module Dimensions in millimetres Size of module A B CDEFGHJ max. 0,1 A43,51021,824,816,512,51,51,53 B401021,824,816,512
35、,51,51,53 C50122324,816,512,51,51,53 D50152424,816,512,51,51,53 Dimensions in inches Size of module A B CDEFGHJ max. 0,004 A1,7120,3930,8580,9760,6490,4920,0590,0590,118 B1,5740,3930,8580,9760,6490,4920,0590,0590,118 C1,9680,4720,9050,9760,6490,4920,0590,0590,118 D1,9680,590,9440,9760,6490,4920,0590
36、,0590,118 0 0,3 + 0,1 0,2 0 0,2 0 0,2 + 0,2 0 0 0,011 + 0,004 0,008 0 0,008 0 0,008 + 0,008 0 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:39:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS G 253:1995 BSI 01-20005 5.1.3 Frames See Figure 3 to Figure 5 and
37、 Table 5 and Table 6 for dimensions of frames for feedback modules. See Figure 6 and Table 7 for dimensions of frames for feedthrough modules. Table 5 Frames for feedback modules (types P1 and P2) NOTEDimensions are given in Table 5. Figure 3 Frame for feedback module: Standard frame P1 NOTEDimensio
38、ns are given in Table 5. Figure 4 Frame for feedback module: Perforated frame P2 Dimensions in millimetres ABCDEFGHL 22256,058,058,610,61,51,527,5 Dimensions in inches ABCDEFGHL 0,8660,9840,2380,3170,3380,4170,0590,0591,082 + 0,3 0,1 + 0,5 0,05 + 0,3 0 + 0,3 0 + 0,011 0,004 + 0,019 0,002 + 0,011 0 +
39、 0,011 0 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:39:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS G 253:1995 6 BSI 01-2000 Table 6 Frames for feedback modules (type P3) Table 7 Frames for feedthrough modules (type P4) Figure 5 Frame for feedback mo
40、dule: Reinforced frame P3 Dimensions in millimetres ABCDEFGHJKL 22256,058,0513151,51,541027,5 Dimensions in inches ABCDEFGHJKL 0,8660,9840,2380,3170,5110,590,0590,0590,1570,3931,082 Figure 6 Frame for feedthrough module: P4 Dimensions in millimetres ABCDEFGHJKL 16,512,54,31,21,21,21,21,51,31,518,9 D
41、imensions in inches ABCDEFGHJKL 0,6490,4920,1690,0470,0470,0470,0470,0590,0510,0590,744 + 0,3 0,1 + 0,5 0,05 + 0,3 0 + 0,3 0 + 0,5 0 + 0,5 0 + 0,011 0,004 + 0,019 0,002 + 0,011 0 + 0,011 0 + 0,019 0 + 0,019 0 + 0,3 0 + 0,3 0 + 0,2 0 + 0,2 0 + 0,2 0 + 0,2 0 + 0,2 0 + 0,2 0 + 0,2 0 + 0,011 0 + 0,011 0
42、 + 0,008 0 + 0,008 0 + 0,008 0 + 0,008 0 + 0,008 0 + 0,008 0 + 0,008 0 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:39:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS G 253:1995 BSI 01-20007 5.1.4 Module clamps and insert See Figure 7 and Figure 8 for the
43、 dimensions of module clamps and inserts. Figure 7 Module clamps for feedback modules (code 1) Figure 8 Module clamps and inserts for feedthrough modules (code 2) Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:39:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
44、 BS G 253:1995 8 BSI 01-2000 5.1.5 Removable identification tags Removable identification tags shall be 5 mm 2,8 mm 0,5 mm. They shall have a white background and all numbers shall be printed in red. 5.1.6 Contacts See Figure 9 to Figure 12 and Table 8. Figure 9 Contact, size 22 Licensed Copy: Londo
45、n South Bank University, London South Bank University, Sat Dec 09 02:39:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS G 253:1995 BSI 01-20009 NOTEWith the exception of the details shown in Figure 11 and Figure 12, Figure 10 is also applicable to size 16 and 12 contacts. Figure 10 Contact, size 20
46、 Figure 11 Detail of the crimping shank of the size 16 contact Figure 12 Detail of the crimping shank of the size 12 contact Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:39:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS G 253:1995 10 BSI 01-2000 Table 8
47、Contacts 5.1.7 Sealing plugs Dimensions of sealing plugs are given in Figure 13 and Table 9. Figure 14 shows the assembly diagram for a sealing plug. Dimensions in millimetres Size of contactABCDEFGHJLMN 22 5,30 5,18 1,70 1,65 0,83 0,73 0,63 0,37 0,94 0,87 1,50 1,45 1,19 1,14 3,81 3,71 1,17 1,12 3,0
48、3 2,79 0,45 0,35 20 4,34 4,06 0,88 0,64 0,83 0,73 0,82 0,66 1,35 1,30 2,62 2,54 1,98 1,93 4,7 4,0 1,98 1,93 3,03 2,79 0,45 0,35 1,67 1,57 16 6,53 6,25 0,88 0,64 1,22 1,12 1,07 0,91 1,73 1,68 3,38 3,30 2,62 2,57 7,2 6,4 2,62 2,57 3,42 3,18 0,45 0,35 2,06 1,91 12 6,53 6,25 0,88 0,64 1,22 1,12 1,07 0,9
49、1 2,59 2,49 4,83 4,75 3,84 3,76 7,2 6,4 3,84 3,76 4,39 4,15 0,56 0,46 3,1 3,0 Dimensions in inches Size of contactABCDEFGHJLMN 22 0,209 0,204 0,067 0,065 0,033 0,029 0,025 0,015 0,037 0,034 0,059 0,057 0,047 0,045 0,150 0,146 0,046 0,044 0,119 0,110 0,018 0,014 20 0,171 0,160 0,035 0,025 0,033 0,029 0,032 0,026 0,053 0,051 0,103 0,100 0,078 0,076 0,185 0,157 0,078 0,076 0,119 0,110