SU1476602A1 - Switching device - Google Patents

Abstract

The invention can be used in monitoring and control equipment. The purpose of the invention is to increase the speed and increase the reliability of the device. The switch contains key-inverters 4 and 5, a remote switch 1 with windings 2 and 3 drivers - expanders 7 and 8 pulses, elements 9 and 10, and key 13 controls. The implementation of elements 9 and 10 with inverse and direct first inputs and the proposed functional connection of circuit elements ensures registration of its leading edge of fast processes and reduces the number of contacts used in remote switch 1. The device provides options for performing elements 9 and 10 with inverse second inputs, connected to the input pins of the key-inverters 4 and 5 or with direct second inputs connected to the output pins of the key-inverters 4 and 5. 2 Cp f-ly, 2 ill.

Description

The invention relates to the field of pulse techniques and can be used in the apparatus USE ^g monitoring and control.

The purpose of the invention is to increase speed by providing registrations on the leading edge of fast processes and increase reliability by reducing the number of contacts of the remote switch.

Figures 1 and 2 are schematic diagrams illustrating two examples of implementation.

The switching device comprises a remote switch 1 with the first and second windings 2 and 3, the first and second inverter keys 4 and 5, the output terminals of which are connected through the windings 2 and 3 to the supply bus 6, the first and second pulse shapers, expanders 7 and 8, connected by outputs to the input terminals of the inverter keys 4 and 5, and the inputs to the outputs of the first and second elements And 9 and 10, which are made with inverse and direct first inputs 11 and 12, respectively, connected to the control key 13.

Elements 9 and 10 can be made with inverse second inputs 14 and 15 connected to the input terminals of the inverter keys 4 and 5, respectively (see Fig. 1) or with direct second inputs connected to the output terminals of the inverter keys 5 and 4 ( see figure 2).

The device operates as follows.

In the initial state, the key 13 is open, at its output a high level signal is supplied to the inputs 11 and 12 of the elements 9 and 10. At the input terminals of the inverter keys 4 and 5, low signals are installed, respectively, at the output terminals of the inverter keys. 4, 5 there is a high voltage level.

As a result, the element 9 is closed at the inverse input 11, which receives a high level signal, and the element 10 is open, since in the circuit of Fig. 2 a high voltage level acts on both of its direct inputs, and in the circuit of Fig. 1 it is applied to the direct input 12 a high signal level simultaneously with the action of a low voltage level at the inverse input 15.

When the key 13 is closed, a low level signal is installed at its output, which locks the element 10 at the input 12 and opens the element 9, the output of which is set to a high level signal, which triggers the expander 7 with its leading edge, the output of which generates a pulse that opens the inverter key 4 for a time sufficient to operate on the winding 2 of the remote switch 1. For the duration of the pulse generated by the shaper-expander 7, an additional locking element 10 is provided, as in the circuit of FIG. 1, a high level signal of the input output of the inverter key 4 is supplied to its inverse input 15, and in the circuit of FIG. 2, a low voltage level from the output terminal of the open key of the inverter 4 is supplied to the direct input 15.

^ When the key 13 is opened, element 9 is locked immediately at input 11, and element 10 is unlocked only at the end of the pulse of the former-expander 7.

At the height of element 10, a high level signal is set up, triggering a shaper-expander 8 with its leading edge, at the output of which a pulse is generated, unlocking the inverter key 5 for a time sufficient to turn off the remote switch 1 through the winding 3.

For the duration of the pulse of the shaper-expander 8, an additional locking of the element 9 is provided through the input 14, on which a high signal level from the input output of the inverter key 5 is supplied in the circuit of Fig. 1, and a low voltage level from the output output of the open circuit in Fig. 2 inverter key 5.

The inclusion (actuation) and disconnection of the remote switch 1 occurs regardless of the presence of contact bounce of the key 13, which additionally improves the reliability of the device.

Claims (3)

Acquisition Formula 1. A switching device containing a remote switch, the first and second keys are inverters, the output terminals of which through the first and second windings of the remote switch are connected to the supply bus, the first and second shapers are pulse extenders, the outputs of which are connected to the input terminals of the first and second inverter keys, respectively, the first and second elements And, | q a control key connected to the first inputs of the first and second elements And, characterized in that, in order to improve performance • and reliability and, the first and second elements 15 | And are made with inverse and direct 'first inputs, respectively, the outputs of the first and second elements And are connected to the inputs of the first and second shaper-expanders of pulses, and the second inputs of the first and second elements And are connected to the terminals | second and first inverter keys, respectively. 2 “Device pop. 1, characterized in that the first and second elements And made with inverse second inputs connected to the input terminals of the second and first keys of the inverters. 3. The device according to claim 1, characterized in that the first and second AND elements are made with direct second inputs connected to the output terminals of the second and first inverter keys.