1、BRITISH STANDARD AEROSPACE SERIES BS G253:1995 ISO8668-3: 1994 Specification for Type1 terminal junction systemsBSG 253:1995 This BritishStandard, having been prepared under the directionof the Engineering SectorBoard, was published underthe authority of the Standards Board and comes intoeffect on 1
2、5May1995 BSI01-2000 The following BSI references relate to the work on this standard: Committee referenceACE/6 Draft for comment92/83129DC ISBN 0 580 24045 2 Committees responsible for this British Standard The preparation of this BritishStandard was entrusted to Technical Committee ACE/6, Aerospace
3、 anionic electrical and fibre-optic technology, upon which the following bodies were represented: British Airways British Cable Makers Confederation British Rubber Manufacturers Association Civil Aviation Authority (Airworthiness Division) Federation of the Electronics Industry Ministry of Defence S
4、ociety of British Aerospace Companies Ltd. Amendments issued since publication Amd. No. Date CommentsBSG 253:1995 BSI 01-2000 i Contents Page Committees responsible Inside front cover National foreword ii 1 Scope 1 2 Normative references 1 3 Definitions 1 4 Designation 1 5 Characteristics 3 6 Toolin
5、g 16 7 Production testing and quality control 16 Figure 1 Feedback module 3 Figure 2 Feedthrough module 4 Figure 3 Frame for feedback module: Standard frame P1 5 Figure 4 Frame for feedback module: Perforated frame P2 5 Figure 5 Frame for feedback module: Reinforced frame P3 6 Figure 6 Frame for fee
6、dthrough module: P4 6 Figure 7 Module clamps for feedback modules (code1) 7 Figure 8 Module clamps and inserts for feedthrough modules (code2) 7 Figure 9 Contact, size22 8 Figure 10 Contact, size20 9 Figure 11 Detail of the crimping shank of the size16 contact 9 Figure 12 Detail of the crimping shan
7、k of the size12 contact 9 Figure 13 Sealing plug 10 Figure 14 Assembly diagram 11 Figure 15 Size A modules 11 Figure 16 Size B modules 12 Figure 17 Size C modules 14 Figure 18 Hybrid interconnection diagram for size C modules 15 Figure 19 Size D modules 15 Table 1 Code for resistance to fluids 1 Tab
8、le 2 Coding of the protection of frames 2 Table 3 Feedback modules 3 Table 4 Feedthrough modules 4 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 Contacts 10 Table 9 Sealing plugs 11 T
9、able 10 Size A modules 12 Table 11 Size B modules 13 Table 12 Size C modules 14 Table 13 Size D modules 15 Table 14 Connection wires 16 List of references Inside back coverBSG 253:1995 ii BSI 01-2000 National foreword This BritishStandard has been prepared by Technical CommitteeACE/6. It is identica
10、l with ISO8668-3:1994, Aircraft Terminal junction systems Part3: Detail specification for type1 system, published by the International Organization for Standardization (ISO). Cross-references The Technical Committee has reviewed the provisions of ISO8668-1:1986, ISO8668-2:1986 and Mil-I-81969:1982,
11、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 provisions of a contract. Users of British Standards are responsible for their correct application. C
12、ompliance 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, pagesi andii, pages1 to18, an inside back cover and a back cover. This standard has been updated (see copyright date) and may ha
13、ve had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BSG 253:1995 BSI 01-2000 1 1 Scope 1.1 This part of ISO8668 specifies the particular characteristics of a terminal junction system (TJS), designated as type1 and intended for use at temperatures b
14、etween 55 C and+155 C. 1.2 The junction systems covered by this part of ISO8668 comprise: a) feedback modules in four sizes; b) feedthrough modules in four sizes; c) frames adapted to these modules: standard frameP1, perforated frameP2 or frameP3 for feedback modules; solid frameP4 for feedthrough m
15、odules; d) module clamps and inserts; e) removable identification tags; f) removable male crimp contacts of sizes22,20,16 and12; g) sealing plugs. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO8668. A
16、t the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO8668 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO mai
17、ntain registers of currently valid International Standards. ISO 8668-1:1986, Aircraft Terminal junction systems Part1: Characteristics. ISO 8668-2:1986, Aircraft Terminal junction systems Part2: Tests. MIL-I-81969:1982, Connector and electrical contact General specification for installing and remova
18、l tools. 3 Definitions For the purposes of this part of ISO8668, the definitions given in ISO8668-1 apply. See also IEC50(581):1978, International Electrotechnical Vocabulary Chapter581: Electromechanical components for electronic equipment. 4 Designation 4.1 Modules The modules shall be designated
19、as follows: a) reference to this part of ISO8668; 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 (se
20、e5.2); e) a letter defining resistance to fluids (see Table 1). Table 1 Code for resistance to fluids EXAMPLE The designation of a size A feedback module with21 contacts of size22, arranged according to interconnection diagram101 and resistant to fluids defined by code A is as follows: Feedback modu
21、le ISO8668-31 A101 A Fluids Code Synthetic oil for turbine aero engines Mineral oil for turbine aero engines Kerosene for turbine aero engines ABSG 253:1995 2 BSI 01-2000 4.2 Frames The frames shall be designated as follows: a) reference to this part of ISO8668; b) separated by a space, a figure ind
22、icating 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 modules; P2=perforated frame for feedback modules; P3=reinforced frame for feedback modules; P4=full frame for feedt
23、hrough 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 (see Table 2). Table 2 Coding of the protection of frames EXAMPLE The designation of a perforated frame for100mm long feedb
24、ack modules, protected by black anodic oxidation, is as follows: Perforated frame ISO8668-31 P21003 4.3 Module clamps and inserts Module clamps and inserts shall be designated as follows: a) reference to this part of ISO8668; b) separated by a space, two letters and one figure indicating the type of
25、 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 follows: Module clamp ISO8668-3SR1 4.4 Contacts The contacts shall be designated as follows: a) reference to this part of ISO8668; b)
26、separated by a space, the two-figure code:22,20,16 or12 indicating the size of contact. EXAMPLE The designation of a contact of size22 is as follows: Contact ISO8668-322 4.5 Sealing plugs Sealing plugs shall be designated as follows: a) reference to this part of ISO8668; b) separated by a space, a t
27、wo-figure code:01,02,03 or04 (see Table 9). Protection Code White cadmium plating Colourless anodic oxidation Black anodic oxidation Yellow anodic oxidation Stainless steel 1 2 3 4 5BSG 253:1995 BSI 01-2000 3 EXAMPLE The designation of a sealing plug for size22 contact cavities is as follows: Sealin
28、g plug ISO8668-301 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 (code1) See Figure 1 and Table 3. Table 3 Feedb
29、ack modules Figure 1 Feedback module Dimensions in millimetres Size of module A B C D E F G H J max. 0,1 A 21,6 10 21,8 24,8 8 6 1,5 1,5 3 B 20 10 21,8 24,8 8 6 1,5 1,5 3 C 25 12 23 24,8 8 6 1,5 1,5 3 D 25 15 24 24,8 8 6 1,5 1,5 3 Dimensions in inches Size of module A B C D E F G H J max. 0,004 A 0,
30、85 0,393 0,858 0,976 0,314 0,236 0,059 0,059 0,118 B 0,787 0,393 0,858 0,976 0,314 0,236 0,059 0,059 0,118 C 0,984 0,472 0,905 0,976 0,314 0,236 0,059 0,059 0,118 D 0,984 0,59 0,944 0,976 0,314 0,236 0,059 0,059 0,118 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
31、0BSG 253:1995 4 BSI 01-2000 5.1.2 Feedthrough modules (code2) See Figure 2 and Table 4. Table 4 Feedthrough modules Figure 2 Feedthrough module Dimensions in millimetres Size of module A B C D E F G H J max. 0,1 A 43,5 10 21,8 24,8 16,5 12,5 1,5 1,5 3 B 40 10 21,8 24,8 16,5 12,5 1,5 1,5 3 C 50 12 23
32、 24,8 16,5 12,5 1,5 1,5 3 D 50 15 24 24,8 16,5 12,5 1,5 1,5 3 Dimensions in inches Size of module A B C D E F G H J max. 0,004 A 1,712 0,393 0,858 0,976 0,649 0,492 0,059 0,059 0,118 B 1,574 0,393 0,858 0,976 0,649 0,492 0,059 0,059 0,118 C 1,968 0,472 0,905 0,976 0,649 0,492 0,059 0,059 0,118 D 1,9
33、68 0,59 0,944 0,976 0,649 0,492 0,059 0,059 0,118 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 0BSG 253:1995 BSI 01-2000 5 5.1.3 Frames See Figure 3 to Figure 5 and Table 5 and Table 6 for dimensions of frames for feedback modules. See Figure 6 and Table 7 for di
34、mensions 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 NOTEDimensions are given in Table 5. Figure 4 Frame for feedback module: Perforated frame P2 Dimensions in mill
35、imetres A B C D E F G H L 22 25 6,05 8,05 8,6 10,6 1,5 1,5 27,5 Dimensions in inches A B C D E F G H L 0,866 0,984 0,238 0,317 0,338 0,417 0,059 0,059 1,082 + 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 + 0,011 0BSG 253:1995 6 BSI 01-2000 Table 6 Frames for feedback modu
36、les (type P3) Table 7 Frames for feedthrough modules (typeP4) Figure 5 Frame for feedback module: Reinforced frame P3 Dimensions in millimetres A B C D E F G H J K L 22 25 6,05 8,05 13 15 1,5 1,5 4 10 27,5 Dimensions in inches A B C D E F G H J K L 0,866 0,984 0,238 0,317 0,511 0,59 0,059 0,059 0,15
37、7 0,393 1,082 Figure 6 Frame for feedthrough module: P4 Dimensions in millimetres A B C D E F G H J K L 16,5 12,5 4,3 1,2 1,2 1,2 1,2 1,5 1,3 1,5 18,9 Dimensions in inches A B C D E F G H J K L 0,649 0,492 0,169 0,047 0,047 0,047 0,047 0,059 0,051 0,059 0,744 + 0,3 0,1 + 0,5 0,05 + 0,3 0 + 0,3 0 + 0
38、,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 + 0,008 0 + 0,008 0 + 0,008 0 + 0,008 0 + 0,008 0 + 0,008 0 + 0,008 0BSG 253:1995 BSI 01-2000 7 5.1.4 Module clamps and insert
39、See Figure 7 and Figure 8 for the dimensions of module clamps and inserts. Figure 7 Module clamps for feedback modules (code1) Figure 8 Module clamps and inserts for feedthrough modules (code2)BSG 253:1995 8 BSI 01-2000 5.1.5 Removable identification tags Removable identification tags shall be5mm 2,
40、8mm 0,5mm. 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, size22BSG 253:1995 BSI 01-2000 9 NOTEWith the exception of the details shown in Figure 11 and Figure 12, Figure 10 is also applicable to size
41、16 and12 contacts. Figure 10 Contact, size20 Figure 11 Detail of the crimping shank of the size16 contact Figure 12 Detail of the crimping shank of the size12 contactBSG 253:1995 10 BSI 01-2000 Table 8 Contacts 5.1.7 Sealing plugs Dimensions of sealing plugs are given in Figure 13 and Table 9. Figur
42、e 14 shows the assembly diagram for a sealing plug. Dimensions in millimetres Size of contact A B C D E F G H J L M N 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 3,03 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
43、,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 0,91 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 Dimensio
44、ns in inches Size of contact A B C D E F G H J L M N 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
45、,119 0,110 0,018 0,014 0,066 0,062 16 0,257 0,246 0,035 0,025 0,048 0,044 0,042 0,036 0,068 0,066 0,133 0,130 0,103 0,101 0,283 0,252 0,103 0,101 0,135 0,125 0,018 0,014 0,081 0,075 12 0,257 0,246 0,035 0,025 0,048 0,044 0,042 0,036 0,102 0,098 0,190 0,187 0,151 0,148 0,283 0,252 0,151 0,148 0,173 0
46、,163 0,022 0,018 0,122 0,118 Figure 13 Sealing plugBSG 253:1995 BSI 01-2000 11 Table 9 Sealing plugs 5.2 Interconnection diagrams The lines defining the diagrams shall be marked on the contact access face. The colour of these lines shall contrast with that of the contact access face. See Figure 15 t
47、o Figure 19 and Table 10 to Table 13. Sealing plug code Size of contact A B Colour C D min. max. min. max. min. max. min. 01 22 0,74 (0,029) 1,12 (0,044) 1,55 (0,061) 1,98 (0,078) Green or yellow 2,79 (0,110) 3,18 (0,125) 13,82 (0,544) 02 20 1,14 (0,045) 1,65 (0,065) 2,16 (0,085) 2,54 (0,100) Red 03
48、 16 1,85 (0,073) 2,36 (0,093) 3,25 (0,128) 3,50 (0,138) Blue 04 12 2,82 (0,111) 3,33 (0,131) 4,22 (0,166) 4,47 (0,176) Yellow NOTEIf a sealing plug is to be fitted, it is necessary to first fit a contact. Figure 14 Assembly diagram Figure 15 Size A modulesBSG 253:1995 12 BSI 01-2000 Table 10 Size A
49、modules Arrangement Feedback module Feedthrough module Number of contacts Definition of diagrams Number of contacts Definition of diagrams 101 21 of size 22 One group of3 contacts Nine groups of2 contacts 102 21 of size 22 Seven groups of3 contacts 103 21 of size 22 One group of21 contacts 104 21 of size 22 Three groups of4 contacts One group of6 contacts One grou
