SU875638A1 - Device for reproducing switching-over functions - Google Patents

Description

(54) DEVICE FOR REPRODUCTION OF SWITCHING FUNCTIONS

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The invention relates to a pulse technique and can be used in the construction of structures of discrete control devices on logical contact circuits.

A device is known for implementing a switching function (1.,

However, the device can play a single preset switching function.

A device for reproducing switching functions 2 is known.

The drawbacks of the device are relatively narrow functionality, since it can reproduce a limited class of switching functions and complexity.

The purpose of the invention is to expand the functional capabilities and simplify the device for switching switching functions.

The goal is achieved by the fact that. in a device for reproducing switching functions containing electromagnetic relays and contacts, the input of each logic variable is connected to the input

the corresponding winding of the first group of relays, the windings of the second group of relays are connected to the setup inputs of the first group, the windings of the third group of relays are connected to the setup inputs of the second group, the first terminals of the closing contacts of the first group of relays are connected to the bus for the logical constant “Unit and the first terminals of the opening contacts of the first group relays, the second terminals of which are connected to the first terminals of the closing contacts of the second relay group, the second terminals

10 of which are connected to the winding inputs of the fourth relay group and through the opening contacts of the second relay group to the second terminals of the first relay group contacts, and the closing contacts of the fourth vertical group of the relay form horizontal circuits of the two-dimensional contact grid, the vertical connections of which are the third relay group contacts , the pins of the contacts of the relay of the left boundary column of the grid are connected to

The bus is for the logical constant “Unit, and the terminals of the relay contacts of the right boundary column of the grid are connected to the output buses of the device.

On .fig. 1 shows a two-dimensional contact network; in fig. 2 — tunable cell of a contact network implementing the proposed method of reproducing switching functions; in fig. 3 shows an example of the implementation of a contact circuit for reproducing a switching function F (A, B, C).

The device contains the first group of inputs I for logic variables, the first group of electromagnetic relays 2 with contacts 3-6, the second group of inputs 7 for the first control unit of tuning variables, the second group of electromagnetic relays 8 with contacts 9-12, the third group of inputs 13 for the second group of tuning variables, the third 14 and fours) 15 relay groups with contacts 16-17 and 18-: 19, respectively, input groups 20 for the logical variable “Unit (power), forming custom cells 21 of the contact network containing the input bus 22 of the logic constant “Unit and output 23 for reproducible switching functions.

The device works as follows.

In the initial state, all relay groups are de-energized. For playback, for example, switching function

F (A, B, C) A (B + C)

Variables A, B and C are fed to the inputs of 1 configurable cells of the contact network with coordinates (1.1), (1.2) and (2.2), respectively, to the inputs of 7 cells of the network with coordinates (1.1) and (1) , 2) tuning variables Oq Qit O (specifying the closing view of the contacts) are provided, the windings of the relay 8 These cells are de-energized, contacts 9-10 are open, contacts I-12 are closed. In this case, if the variable А О (8 0), the winding of the relay 2 is de-energized, the contacts 3-4 are open and, therefore, the winding of the relay 15 is de-energized. Thus, contacts 16-17 remain open until they change their value, variable A (B), and the output value A 0 (B 0) is reproduced at the output. At A 1 (B 1), the winding of the relay 2 is plugged, the contacts 3-4 are closed and the logic constant from the input wiring 20 is applied to the winding of the relay 15, the contacts 16-17 are closed, and the output A 1 (B I) is output. If the input of a network cell with coordinates (2.2) is fed to the tuning variable a, d 1; the winding of the relay 8 cells (2.2) is energized, the closing contacts 9-10 are closed, and the opening contacts | -12 open. If C o is variable, then contacts 5-6 of relay 2, the winding of which is de-energized, are closed and the input constant 20 logic constant "Unit through contacts 5-6 and 9-10 is fed to the winding of relay 15, contacts 16-

17 of which are closed, resulting in the reproduction of variable C 1. If C 1 is variable, then the winding of the relay 8 is closed, the contacts 5-6 of the relay 2 are open and the winding of the relay 15 is de-energized, and therefore the contacts 16-17 are open 21 the device reproduces the variable C 0. At the outputs of the 13 cells with coordinates (1,1) and (1,2), the tuning variables 0c are supplied to | 2 1, the relay coils 14 of these cells are energized to contacts 18-19 are closed, forming a parallel connection of the contacts for variables B and C . On the configuration inputs 7 of the first group of the remaining cells of the first page Oxy (cells with coordinates ((1,3), (1,4), ..., (1, p)) serve tuning variables Oi a, ... a „1, the relay windings 8 of these cells are energized, pins 9 -10 is closed, the logical constant "Unit of strip 20 is fed through contacts 5-6 and 9-10 to the winding of the relay 15, contacts 16-17 of which are closed. To the remaining inputs

1, 7, and 13 network cells provide a logical "zero. In this case, a contact circuit is formed in the network, shown in Fig. 3 and reproducing the switching function F (A, B, C) at the output 23 of the first row. At the same time, other networks can be implemented.

switching functions with the help of unused when implementing functions F (A, B, C) cells and the remaining output buses 23.

Claims (2)

1. Laneov L. L. and others. Digital frequency dividers on logic elements. 1975, s: 11-12. 2. Fridman A., Menoy P. Theory and design of switching circuits. 1978 with. 103, fig. 2.31. , R fuz.J Jljld  0