1、BRITISH STANDARD AEROSPACE SERIES BS G254:1994 ISO8668-4: 1993 Specification for Type2 terminal junction systems UDC 629.7.064.5:621.316.541BSG254:1994 This BritishStandard, having been prepared under the directionof the Aerospace Standards Policy Committee, waspublished under the authorityof the St
2、andards Boardand comes into effect on 15March1994 BSI01-2000 The following BSI references relate to the work on this standard: Committee reference ACE/6 Draft for comment92/72823 DC ISBN 0 580 22866 5 Committees responsible for this BritishStandard The preparation of this BritishStandard was entrust
3、ed by the Aerospace Standards Policy Committee (ACE/-) to Technical Committee ACE/6, upon which the following bodies were represented: British Airways British Cable Makers Confederation British Rubber Manufacturers Association Civil Aviation Authority (Airworthiness Division) Electronic Components I
4、ndustries Federation Ministry of Defence Society of British Aerospace Companies Ltd. Amendments issued since publication Amd. No. Date CommentsBSG254:1994 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 D
5、esignation 1 5 Characteristics 3 6 Tooling 23 7 Production testing and quality surveillance 23 Figure 1 Feedback modules 3 Figure 2 Feedthrough modules 4 Figure 3 Monolithic frames (code1M) 5 Figure 4 Double frames (code1N) 6 Figure 5 Double frames (code2N) 10 Figure 6 Spacers (code ER) 13 Figure 7
6、Spacers (code ET) 13 Figure 8 Contact, size22 14 Figure 9 Contact, size20 14 Figure 10 Detail of the crimping shank of the size16 contact 15 Figure 11 Detail of the crimping shank of the size16 contact 15 Figure 12 Sealing plug 16 Figure 13 Assembly diagram 17 Figure 14 Size A modules 18 Figure 15 S
7、ize B modules 19 Figure 16 Size C modules 20 Figure 17 Size D modules 21 Figure 18 Hybrid interconnection diagrams sizes B, C and D modules 22 Table 1 Code for resistance to fluids 1 Table 2 Code for protection of frames 2 Table 3 Feedback modules 3 Table 4 Feedthrough modules 4 Table 5 Monolithic f
8、rames for feedback modules (code1M) 7 Table 6 Double frames for feedback modules (code1N) 7 Table 7 Monolithic frames (code1M) and doubles frames (code1N)forfeedback modules Length code and possible modulecombinations 7 Table 8 Double frames for feedthrough modules (code2N) 11 Table 9 Double frames
9、for feedthrough modules (code2N)Lengthcodeand possible module combinations 11 Table 10 Contacts 16 Table 11 Sealing plugs 17 Table 12 Size A modules 18 Table 13 Size B modules 19 Table 14 Size C modules 20 Table 15 Size D modules 21 Table 16 Hybrid interconnections 22 Table 17 Connection wires 22 Li
10、st of references Inside back coverBSG254:1994 ii BSI 01-2000 National foreword This BritishStandard has been prepared under the direction of the Aerospace Standards Policy Committee. It is identical with ISO8668-4:1993 Aircraft Terminal junction systems Part4: Detail specification for type2 system,
11、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, to which normative reference is made in the text, and has decided that they are acceptable for use in c
12、onjunction 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. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of
13、 pages This document comprises a front cover, an inside front cover, pagesi andii, pages1to24, an 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.
14、BSG254:1994 BSI 01-2000 1 1 Scope 1.1 This part of ISO8668 specifies the particular characteristics of a terminal junction system (TJS), designated as type2, and intended for use at temperatures from55 C to+155 C. 1.2 The junction system covered by this part of ISO8668 comprises: a) feedback modules
15、 in four sizes; b) feedthrough modules in four sizes; c) frames adapted to these modules: monolithic frame and double frame for feedback modules, and double frame for feedthrough modules; d) spacers; e) removable male crimp contacts of sizes22,20,16 and12; f) sealing plugs. 2 Normative references Th
16、e following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO8668. At 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
17、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 International Standards. ISO8668-1:1986, Aircraft Terminal junction systems Part1: Characteristics. ISO8668-2:1986, Aircraft Terminal jun
18、ction systems Part2: Tests. MIL-I-81969:1982, Connector and electrical contact General specification for installing and removal tools. 3 Definitions For the purposes of this part of ISO8668, the definitions given in ISO8668-1 and the following definition apply. See also IEC50(581):1978, Internationa
19、l Electrotechnical Vocabulary Chapter581:Electromechanical components for electronic equipment. 3.1 spacer a removable part used, for certain combinations of module in a frame, to adapt the length of the stacked modules to the available space between the two module clamps of the frame 4 Designation
20、4.1 Modules The modules shall be designated 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) two figures
21、indicating the interconnection diagram (see5.2); e) a letter defining resistance to fluids (see Table 1). Table 1 Code for resistance to fluids Fluid Code Synthetic oil for turbine aero engines Mineral oil for turbine aero engines Kerosene for turbine aero engines ABSG254:1994 2 BSI 01-2000 EXAMPLE
22、The designation of a size A feedback module with10 contacts of size22, arranged according to interconnection diagram12 and resistant to fluids defined by code A, is as follows: Feedback module ISO8668-41 A12 A 4.2 Frames The frames shall be designated as follows: a) reference to this part of ISO8668
23、; 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: M=monolithic frame, N=double frame; d) three-figure code indicating the length of the frame (see Table 7 and Table
24、 9); e) separated by a hyphen, a figure indicating the nature of the protection of the frame (see Table 2). Table 2 Code for protection of frames EXAMPLE The designation of a double frame for feedback modules of length100,3mm, protected by black anodic oxidation is as follows: Double frame ISO8668-4
25、1N100 3 4.3 Spacers Spacers shall be designated as follows: a) reference to this part of ISO8668; b) separated by a space, two letters indicating the type of spacer: ER=spacer for feedback modules, ET=spacer for feedthrough modules. EXAMPLE The designation of a spacer for a feedback module is as fol
26、lows: Spacer ISO8668-4 ER 4.4 Contacts The contacts shall be designated as follows: a) reference to this part of ISO8668; b) separated by a space, the two-figure code indicating the size of contact:22,20,16 or12. EXAMPLE The designation of a contact of size22 is as follows: Contact ISO8668-422 4.5 S
27、ealing plugs Sealing plugs shall be designated as follows: a) reference to this part of ISO8668; b) separated by a space, a two-figure code:01,02,03 or04 (see Table 11). Protection Code White cadmium plating Colourless anodic oxidation Black anodic oxidation Yellow anodic oxidation 1 2 3 4BSG254:199
28、4 BSI 01-2000 3 EXAMPLE The designation of a sealing plug for size22 contact cavities is as follows: Sealing plug ISO8668-401 5 Characteristics 5.1 Dimensions The dimensions are given in millimetres. In the figures and in certain tables, values in inches are additionally given in parentheses. Drawin
29、gs are shown using the first angle projection method. 5.1.1 Feedback modules (code1) See Figure 1 and Table 3. Table 3 Feedback modules Figure 1 Feedback modules Dimensions in millimetres Module size A 0,13 B 0,15 C max. D 0,13 E 0,25 F max. G H max. J max. A 10,01 8,48 16,94 17,53 14,76 20,65 16,76
30、 B 10,01 8,48 16,94 17,53 14,76 19,6 16,76 C 24,89 21,05 16,94 17,53 13,87 20,4 16,76 D 32,38 28,45 17,53 13,56 24,05 16,76 16,94 23,22 Dimensions in inches Module size A 0,005 B 0,006 C max. D 0,005 E 0,01 F max. G H max. J max. A 0,394 0,334 0,667 0,69 0,581 0,813 0,66 B 0,394 0,334 0,667 0,69 0,5
31、81 0,752 0,66 C 0,98 0,829 0,667 0,69 0,546 0,803 0,66 D 1,274 1,12 0,69 0,534 0,66 0,667 0,914 +0,35 0 +0,014 0BSG254:1994 4 BSI 01-2000 5.1.2 Feedthrough modules (code2) See Figure 2 and Table 4. Table 4 Feedthrough modules 5.1.3 Frames 5.1.3.1 Monolithic frames for feedback modules (code1M) The m
32、onolithic frame is composed of a single U-shaped element and two module clamps. See Figure 3 and Table 5 and Table 7. NOTE 1Dimensions of A and A 1are given in Table 7. Figure 2 Feedthrough modules Dimensions in millimetres Module size A 0,13 B max. C max. D 0,13 E 0,13 F 0,13 G 0,15 H 0,25 J max. K
33、 max. M 0,13 N 0,13 A 10,01 28,96 33,3 20,12 7,75 5,21 8,48 16,08 B 10,01 28,96 33,55 20,12 7,75 5,21 8,48 16,08 C 24,89 29,16 38,6 20,12 7,75 5,21 21,05 13,92 D 32,38 20,12 28,45 14,22 23,16 41,3 7,75 5,21 Dimensions in inches Module size A 0,005 B max. C max. D 0,005 E 0,005 F 0,005 G 0,006 H 0,01
34、 J max. K max. M 0,005 N 0,005 A 0,394 1,14 1,311 0,792 0,305 0,205 0,334 0,656 B 0,394 1,14 1,311 0,792 0,305 0,205 0,334 0,656 C 0,98 1,148 1,52 0,792 0,305 0,205 0,829 0,548 D 1,274 0,792 1,12 0,56 1,148 1,626 0,305 0,205BSG254:1994 BSI 01-2000 5 Figure 3 Monolithic frames (code1M)BSG254:1994 6 B
35、SI 01-2000 5.1.3.2 Double frames for feedback modules (code1N) The double frame is composed of two elements and two module clamps. See Figure 4 and Table 6 and Table 7. NOTE 2Dimensions of A and A 1are given in Table 7. Figure 4 Double frames (code1N)BSG254:1994 BSI 01-2000 7 Table 5 Monolithic fram
36、es for feedback modules (code1M) Table 6 Double frames for feedback modules (code1N) Table 7 Monolithic frames (code1M) and double frames (code1N) for feedback modules Length code and possible module combinations Dimensions in millimetres E 0,5 F 0,28 G 0,18 H 0,5 J 0,25 K 0,5 L 0,16 M 0,2 18,7 6,08
37、 3,98 19,3 9,95 15,41 17,83 17,15 Dimensions in inches E 0,02 F 0,011 G 0,007 H 0,02 J 0,01 K 0,02 L 0,006 M 0,008 0,736 0,239 0,157 0,76 0,36 0,607 0,702 0,675 Dimensions in millimetres E 1 0,25 F 1 0,28 G 1 0,18 H 1 0,5 J 1 0,25 L 1 0,13 R 0,15 S 0,2 T U 0,15 20,12 8,89 4,57 21,1 10,55 17,42 1,57
38、17,15 1,37 1,83 Dimensions in inches E 1 0,01 F 1 0,011 G 1 0,007 H 1 0,02 J 1 0,01 L 1 0,005 R 0,006 S 0,008 T U 0,006 0,792 0,35 0,18 0,831 0,415 0,686 0,062 0,675 0,054 0,072 Length code A 0,25 ( 0,01) A 1 0,25 ( 0,01) B 0,4 ( 0,016) Possible combinations (for information) Number of modules of co
39、de Spacer A or B C D 035 25,53 (1,005) 24,27 (0,956) 35,43 (1,395) 1 045 35,56 (1,4) 34,2 (1,346) 45,47 (1,79) 2 050 40,39 (1,59) 39,17 (1,542) 50,29 (1,98) 1 055 45,59 (1,795) 44,35 (1,746) 55,5 (2,185) 3 060 50,42 (1,985) 49,21 (1,937) 60,32 (2,375) 1 1 1 1 065 55,83 (2,198) 54,3 (2,138) 65,73 (2,
40、588) 4 075 65,66 (2,585) 64,41 (2,536) 75,56 (2,975) 5 2 080 70,48 (2,775) 69,27 (2,727) 80,39 (3,165) 3 1 2 1 1 085 75,63 (2,978) 74,3 (2,925) 85,6 (3,37) 6 1 2 1 1 1 0 0,15 0 0,006BSG254:1994 8 BSI 01-2000Table 7 Monolithic frames (code1M) and double frames (code1N) for feedback modules Length cod
41、e and possible module combinations Length code A 0,25 ( 0,01) A 1 0,25 ( 0,01) B 0,4 ( 0,016) Possible combinations (for information) Number of modules of code Spacer A or B C D 090 80,52 (3,17) 79,3 (3,122) 90,42 (3,56) 4 1 3 1 1 2 100 90,4 (3,559) 89,1 (3,508) 100,3 (3,949) 5 1 4 1 1 1 2 3 105 95,
42、76 (3,77) 94,38 (3,716) 105,66 (4,16) 8 3 2 2 1 1 1 115 105,94 (4,171) 104,51 (4,115) 115,85 (4,561) 9 4 2 3 1 1 1 125 115,82 (4,56) 114,45 (4,506) 125,73 (4,95) 10 5 2 4 1 1 1 1 1 2 4 3 1 140 130,83 (5,151) 129,42 (5,095) 140,74 (5,541) 9 1 8 1 1 5 2 4 3 3 2 1 1 2 2 145 135,51 (5,335) 134,28 (5,287
43、) 145,51 (5,725) 7 2 6 1 1 1 3 1 2 2 4 2 3 1 1 3 1 1BSG254:1994 BSI 01-2000 9Table 7 Monolithic frames (code1M) and double frames (code1N) for feedback modules Length code and possible module combinations Length code A 0,25 ( 0,01) A 1 0,25 ( 0,01) B 0,4 ( 0,016) Possible combinations (for informati
44、on) Number of modules of code Spacer A or B C D 150 140,87 (5,546) 139,44 (5,49) 150,77 (5,936) 10 1 9 1 1 6 2 5 3 4 2 1 1 1 2 2 5 155 145,26 (5,719) 143,96 (5,668) 155,17 (6,109) 13 8 2 7 1 1 1 4 1 2 3 4 3 3 1 2 3 1 1 4 175 165,38 (6,511) 164,3 (6,469) 175,28 (6,901) 15 10 2 6 1 2 5 4 5 3 1 2 4 1 3
45、 2 6 2 3 1BSG254:1994 10 BSI 01-2000 5.1.3.3 Double frames for feedback modules (code2N) The frames are composed of two elements and two module clamps. See Figure 5 and Table 8 and Table 9. Figure 5 Double frames (code2N)BSG254:1994 BSI 01-2000 11 Table 8 Double frames for feedthrough modules (code2
46、N) Table 9 Double frames for feedthrough modules (code2N) Length code and possible module combinations Dimensions in millimetres E 0,25 F 0,2 G 0,1 H 0,18 J 0,15 K 0,51 L 0,18 M 0,09 32,14 3,94 20,01 10,16 4,67 23,77 18,49 9,24 N 0,15 P 0,15 R 0,15 S 0,15 T U 0,15 V 0,15 W 0,15 22,71 8,25 1,57 0,51
47、1,37 1,83 29,34 1,4 Dimensions in inches E 0,01 F 0,008 G 0,004 H 0,007 J 0,006 K 0,02 L 0,007 M 0,004 1,265 0,155 0,788 0,4 0,184 0,936 0,728 0,364 N 0,006 P 0,006 R 0,006 S 0,006 T U 0,006 V 0,006 W 0,006 0,894 0,325 0,062 0,02 0,054 0,072 1,155 0,055 Length code A 0,4 ( 0,016) B 0,5 ( 0,02) C 0,2
48、5 ( 0,01) Possible combinations (for information) Number of modules of code Spacer A or B C D 035 54,51 (2,146) 46,13 (1,816) 35,71 (1,406) 2 045 64,26 (2,53) 55,88 (2,2) 45,47 (1,79) 3 047 66,78 (2,629) 58,39 (2,299) 47,98 (1,889) 3 1 1 050 69,24 (2,726) 60,86 (2,396) 50,44 (1,986) 1 1 1 1 055 74,62 (2,938) 66,24 (2,608) 55,83 (2,198) 4 060 79,3 (3,122) 70,92 (2,792) 60,5 (2,382) 2 1 1 1 1 065 84,38 (3,322) 76 (2,992) 65,58 (2,582) 5
