SU1503067A1 - Device for switching discrete signals - Google Patents

Abstract

The invention relates to a pulse technique and can be used in digital systems of automation and computer technology. The purpose of the invention is to increase the reliability of the switch. The switchboard contains a matrix of 1 switching elements 2 installed at the intersection of the control 3 and information 4 buses of the switch, the first and second blocks of keys 5 and 8, and the blocks of indication 6 and 7. The device allows you to quickly monitor the health of the switching circuits. 5 il.

Description

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The invention relates to a pulse technique and can be used for compilation and transmission of information in digital automation and computer systems.

The aim of the invention is to increase the reliability of the switch.

FIG. 1 is a block diagram of the switch j in FIG. 2 — a basic circuit diagram of a switching element; on fig.Z - the first block of keys on fig.A - the second block of keys; on fig.Z - display units.

The discrete signal switchboard contains a matrix of 1 switching elements 2 installed at the intersection of the control (there are 3 of them and 4 information buses, the first key block 5, the state indication block 6, the address indication block 7, the second key block 8 with outputs 9 and 10 and inputs 11 and 12 respectively.

The switching element 2 (FIG. 2) contains an optocoupler 13, a sensor 1A, an indication element 15, the first 16 and the second 17 separating elements.

The first key block 5 (FIG. 3) contains transistor switches 18 for switching DC circuits.

The second key block 8 (FIG. 4) contains transistor switches 19 and 20, a toggle switch 21 and a two-bit register 22

The device works as follows.

in the initial state, the register 22 of the second key block 8 is in the reset state, the toggle switch 21 is closed, the signals at the inputs of the blocks 5 and 8 keys are missing. All keys of blocks 5 and 8 are closed. High potentials are fixed at the inputs of the status indication unit 6 and the inputs of the address indication unit 7.

If necessary, switching any, for example, the first, group of sensors 14 to the first input of block 5, a signal is sent that corresponds to the log. 1, which corresponds to the code of the number of the first group of sensors (100 ... 0), and the input of the register 22 is given a signal that opens the key 19 of the block 8, which closes all the sensors 14 of the switching elements 2 to a common shield. The opened first key of block 5 shunts the input circuit of the first key of block 7 and closes it. The output potential of the first key of the block 7 is increased, signaled about the number of cont

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Rolling sensor group 14 (first). At the same time, the first key of unit 5 converts the photodetectors of the optocouplers 13 of the first group of switching elements 2 into the operating mode.

If any contact, for example, the first sensor 14, which is located at the intersection of the first control 3 and informational 4-pin matrix 1, is closed (this corresponds to a logical 1 signal from the sensor), the LED (emitter) connected to this sensor is optr 13 and the element 15 indications are energized. In this case, the excited emitter of the optocoupler 13 excites the corresponding photodetector, which generates a photocurrent sufficient to trigger the first key of block 6. The first key of block 6 opens, fixing a low potential at the first output of block 6. To check the reliability of switched signals, after resetting the register 22 Logical 1 is input to input 12 of block 8. In this case, the key 19 of block B is closed by disconnecting all sensors 14 from the common bus, and key 20 is opened, exciting all emitters of optocouplers 13 and elements 15 of the matrix 1 display. Excited The state of the display elements 15 and the signal elements of the unit 6 makes it possible to judge the health of the switch circuits.

To operate the device in an autonomous mode, the operator must open the toggle switch 21, and then perform all monitoring and analysis activities using toggle switches and signal elements with which blocks 5–8 are provided,

Claims (1)

Thus, by introducing new elements and changing the design of the matrix of switching elements in the commutator, the reliability and reliability of the input of discrete signals is increased. Invention Formula A discrete signal switchboard containing a matrix of switching elements, each of which contains an optocoupler, a photodetector of which is connected between the control and the informational bus of the matrix, and the emitter of the optocoupler is connected through a current limiter to the switchboard bus by one output and to the first output of the sensor first block From 9 fl U1 2 P,  / l Fi.Z FIG. 2 d. 2 frt. 2 0we. five