BS-7845-1996.pdf
《BS-7845-1996.pdf》由会员分享,可在线阅读,更多相关《BS-7845-1996.pdf(64页珍藏版)》请在三一文库上搜索。
1、BRITISH STANDARD BS 7845:1996 Guide to the use of BS 3939 and BS EN 60617, Graphical symbols for diagrams Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 09:59:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7845:1996 This British Standard, having been prepared
2、 under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 April 1996 BSI 08-1999 The following BSI references relate to the work on this standard: Committee reference GEL/3 Draft for comment 95/207588 DC ISBN 0 580
3、 25376 7 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee GEL/3, Documentation used for graphical symbols, upon which the following bodies were represented: Consumer Policy Committee of BSI Federation of the Electronics In
4、dustry GAMBICA (BEAMA Ltd.) Transmission and Distribution Association (BEAMA Ltd.) British Photographic Association Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 09:59:01 GMT+00:00 2006, Uncontrolled Cop
5、y, (c) BSI BS 7845:1996 BSI 08-1999i Contents Page Committees responsibleInside front cover Forewordii Section 1. General 1.1Scope1 1.2Informative references1 1.3Definitions1 Section 2. Principle types of diagram 2.1Block diagram2 2.2Circuit diagram2 2.3Connection diagram2 2.4Interconnection diagram
6、2 Section 3. Use of qualifying symbols, symbol elements and other symbols 3.1General10 3.2Use of qualifying symbols10 3.3Use of symbol elements and other symbols11 Section 4. Guiding principles for the preparation of electrical and electronics diagrams 4.1General14 4.2Component identification refere
7、nces15 Section 5. BS 3939 and BS EN 60617 structure 5.1Summary of BS 3939-1 General information, general index16 5.2Summary of BS 3939-2 Symbol elements, qualifying symbols and other symbols having general application16 5.3Summary of BS 3939-3 Conductors and connecting devices16 5.4Summary of BS 393
8、9-4 Passive components16 5.5Summary of BS 3939-5 Semiconductors and electron tubes16 5.6Summary of BS 3939-6 Production and conversion of electrical energy16 5.7Summary of BS 3939-7 Switchgear and controlgear protective devices16 5.8Summary of BS 3939-8 Measuring instruments, lamps and signalling de
9、vices16 5.9Summary of BS 3939-9 Telecommunications: Switching and peripheral equipment17 5.10 Summary of BS 3939-10 Telecommunications: Transmission16 5.11 Summary of BS 3939-11 Architectural and topographical installation plans and diagrams16 Section 6. BS 3939-12 and BS EN 60617-13 6.1General29 6.
10、2Symbol construction29 6.3Logic conventions29 6.4Input and output connections30 6.5Combinational logic32 6.6Dependency notation34 6.7Sequential logic36 6.8Comon control and output blocks39 6.9Sequences of dependancy identifiers40 Licensed Copy: London South Bank University, London South Bank Univers
11、ity, Fri Dec 08 09:59:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7845:1996 ii BSI 08-1999 Page 6.10 Internal and virtual connections29 6.11 Bit, line and label grouping29 6.12 Grey-box notation29 6.13 Bus symbols29 6.14 Analogue elements29 Annex A (normative) Component identification reference
12、s52 Figure 1 Example of a block diagram; a frequency synthesis assembly3 Figure 2 Example of a block diagram; an electric power distribution system4 Figure 3 Example of part of an analogue circuit diagram; a main channel detector5 Figure 4 Example of a digital circuit diagram; a frequency generation
13、 circuit board6 Figure 5 Example of a circuit diagram using detached representation7 Figure 6 Example of a unit connection diagram using continuous lines8 Figure 7 Example of an interconnection diagram using multi-line representation9 Figure 8 Example of an interconnection diagram with cable end con
14、nectors9 Figure 9 Relationships between symbol definitions10 Figure 10 Example of the use of the qualifying symbol representing variability10 Figure 11 Example of the use of the qualifying symbol representing pre-set adjustment11 Figure 12 Example of the use of the qualifying symbol for qualifying p
15、urposes11 Figure 13 Example of a block symbol with BS 3939 reference number12 Figure 14 Example of a component symbol with BS 3939 reference number12 Figure 15 Example of a component symbol with BS 3939 reference number13 Figure 16 Symbol elements, qualifying symbols and other symbols having general
16、 application18 Figure 17 Conductors and connecting devices19 Figure 18 Passive components20 Figure 19 Semiconductors and electron tubes21 Figure 20 Production and conversion of electrical energy23 Figure 21 Switchgear, controlgear and protective devices24 Figure 22 Measuring instruments, lamps and s
17、ignalling devices25 Figure 23 Transducers26 Figure 24 Telecommunications Transmission27 Figure 25 Architectural and topographical installation plans and diagrams28 Figure 26 7491 series serial-in, serial-out 8-bit shift register29 Figure 27 Part of a 7458 series AND-OR gate29 Figure 28 Negation symb
18、ols30 Figure 29 Polarity indicators30 Figure 30 An input performing more than one function31 Figure 31 Internally or externally connected terminals32 Figure 32 Reversed and bi-directional signal flow32 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 09:59:01 GMT
19、+00:00 2006, Uncontrolled Copy, (c) BSI BS 7845:1996 BSI 08-1999iii Page Figure 33 Reversed and bi-directional flow with negation symbols32 Figure 34 Alternative forms for bi-directional signal flow with logic inversion32 Figure 35 Qualifying symbols for analogue, digital and non-logic connections32
20、 Figure 36 Connection between a terminal and the case of a device32 Figure 37 Terminal identifiers32 Figure 38 Examples of general qualifying symbols33 Figure 39 Examples of the use of qualifying symbols to define device function and input/output conditions35 Figure 40 An analogue two-way switch36 F
21、igure 41 Dynamic input symbol37 Figure 42 Three examples of S-R latches38 Figure 43 Two examples of D-type latches38 Figure 44 Two examples of edge-triggered J-K flip-flops38 Figure 45 Examples of three methods of illustrating postponed output38 Figure 46 A type 286 bus transceiver39 Figure 47 A cou
22、nter in the 74191 series39 Figure 48 Four examples of internal connections41 Figure 49 Example showing the use of virtual inputs and outputs41 Figure 50 Three examples illustrating the use of the bit grouping symbol42 Figure 51 Three examples illustrating the use of the line grouping symbol43 Figure
23、 52 Alternative input forms44 Figure 53 Splitting long signal names44 Figure 54 A type 927 remote-control receiver44 Figure 55 A type 8284 clock generator44 Figure 56 A type 8085 microprocessor45 Figure 57 A type 571 10-bit analogue-to-digital converter46 Figure 58 Non-logic connection48 Figure 59 Q
24、ualifying symbols for supply terminals48 Figure 60 Examples of amplifiers and a comparator49 Figure 61 Two examples of voltage regulators50 Figure 62 A type 7543 digital-to-analogue convertor50 Figure 63 A type 449 analogue-to-digital convertor51 Figure 64 Two examples of analogue devices51 Table 1
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- BS 7845 1996
链接地址:https://www.31doc.com/p-3736144.html