GOST 2.757-81 * Unified system for design documentation. Graphical symbols in diagrams. Elements of the switching field for switching systems

GOST 2.757-81 * UDC 003.62:621.316.5.062:006.354 Group T52 Interstate standard Unified system for design documentation Graphical symbols in the Scheme. ELEMENTS switching field for switching systems Unified system for design documentation. Graphic designations in diagrams. Commutational field elements of commutational systems Decree of the USSR State Committee on Standards of March 31, 1981 № 1698 deadline for implementing set with 07.01.1981 * edition (October 2000) with Amendment number 1, approved in March 1994 (ICS 5 - 94) 1. This standard establishes a conditional graphical notation elements switching field for switching systems in the schemes operated manually or automated fashion, products of all industries and construction. (Revised edition, Alt. № 1). 2. Denote elements of switching field in the table. Examples of applications in the design of symbols of elements of the switching field (see Appendix). Name Designation 1. Link Layer 2. Switching element with the image of the inputs and outputs: Generic term for the X inputs and Y outputs contains Z groups, each having X inputs and Y outputs 3. Link switching from one group of inputs and outputs any number of groups: the general term with a certain number of inputs and outputs in groups, for example, 10 inputs, 7 outputs in the first group and 8 outputs in the second group 4. Switching element with any number of groups of inputs and outputs: a generic term with a certain number of groups of inputs and outputs groups, such as the number of groups of input 2, the number of entries in each group of 10 and 20, the number of groups O 3 and the number of outlets in each group, 6, 7 8 5. Switching element with any number of groups of inputs with the lines of bilateral actions in each and any number of groups of outputs with the outgoing and incoming lines of unilateral action 6. Labeled switching stage (input and output refer to the points): single-link switch with two links of switching to the three links of switching mixed, with one, two and three links of switching 7. Step searches: switching from one link is mixed, with one, two and three links of switching Switching cascade comprising three connecting stage 8. m spatially-separated chains 9. Multichannel transmission system with a time division multiple access (n - number of multi-channel transmission systems with X time channels each) 10. Time channel with the number of Y (Revised edition, Alt. № 1). Annex BACKGROUND EXAMPLES OF ELECTRICAL BLOCK DIAGRAM switching systems Example 1. Switching system containing two switching stages are marked with ABC or ABCD and E, EF and EFG, connected via nekommutatsionnoe device. Connections are made as follows: incoming - by DCBA; vnutristantsionnye - through the FAA, EF and CBA; outgoing - by ABC, and either E or EF, or EFG. Example 2. Switching system with three stages of search. A - pre-stage of seeking; B or sun - the group stage of seeking; D - degree of linear quests Example 3. Multichannel transmission system with a time division multiplexing, in which 1,000 subscriber lines are divided as follows: Four groups of 250 lines, 50 time channels, 8 channels of distributors time, system-wide. Connection between subscribers of different groups is carried out through three-level switching ABC. Connections between subscribers within the same group carried out in six parts switching: ABC - Distribution channels interim CBA. External connections are made through three-level switching: ABD - outgoing, EVA - incoming. Posted on 07/08/2008 GOST on "Electrical, lighting, security systems," GOST 15597-82 Fixtures for industrial buildings. General specifications GOST 2.702-75 Unified system for design documentation. Rules for making electronic circuits with GOST 2.752-71 Unified system for design documentation. Graphical symbols in diagrams. Robot device GOST 2.755-87 Unified system for design documentation. Graphical symbols in electrical circuits. Device switching and contact connections GOST 2.756-76 * Unified system for design documentation. Graphical symbols in diagrams. Is often perceived electromechanical devices GOST 2.758-81 Unified system for design documentation. Graphical symbols in diagrams. Signal Technology GOST 2.762-85 * Unified system for design documentation. Graphical symbols in electrical circuits. Frequencies and frequency bands for transmission systems GOST 2.763-85 * Unified system for design documentation. Graphical symbols in electrical circuits. Device with a pulse-code modulation GOST 2.764-86 Unified system for design documentation. Graphical symbols in electrical circuits. Integrated optoelectronic display elements GOST 2.768-90 Unified system for design documentation. Graphical symbols in diagrams.