RU2772740C1 - Multichannel device for picking up and supplying bipolar logic signals - Google Patents

Abstract

FIELD: electronics.

SUBSTANCE: invention relates to electronics, namely to circuits for checking discrete input modules and discrete output modules. The device contains: a block of protection against excess and reverse polarity of supply voltages and overcurrent, an external voltage source made in the form of an external direct voltage source with variable output voltage, a block for setting the polarity of input voltage of discrete input channels, a block of bipolar direct voltage sources with a light indication of flowing current, a block for stabilizing voltage of discrete output channels with galvanic isolation, a block for setting the polarity of voltage supplied to discrete output channels of the “dry contact” type, N blocks of keys with galvanic isolation, made in the form of bidirectional bipolar keys with galvanic isolation, N blocks of current amplifiers, made in the form of blocks of bidirectional bipolar current amplifiers with a light indication of flowing current.

EFFECT: providing a device for multichannel pickup of both positive and negative control logic signals from N discrete output channels of the “dry contact” type with a light indication of the reception of a logic signal in each channel, with the possibility of switching the polarity of supply voltage of the specified channels, as well as with the possibility of current limitation and regulation of the output voltage level of the logic signal at N outputs of the device at the required level and the output of output logic signals from them of both positive and negative polarity to inputs of passive discrete input channels with the number of channels N.

8 cl, 10 dwg

Description

The invention relates to electronics, namely to circuits for testing discrete input modules and discrete output modules. The invention can be used in industrial automation circuits, circuits of automated process control systems, for picking up signals from the outputs of discrete output channels of the "dry contact" type and supplying the received signals to the inputs of passive discrete input channels, for picking up and supplying discrete signals in programmable logic controllers, in multichannel control systems for peripheral equipment, in multichannel control systems for digital devices, in robotics and other areas.

The current state of the art requires the improvement of a number of important operational characteristics of the device. The technical result, which provides the required improvements, is to achieve a combination of a number of characteristics of the proposed device: the possibility of supplying discrete digital signals of both positive and negative polarity to the same inputs of the device, the possibility of issuing discrete digital signals of both positive and negative polarity to one and the same outputs of the device, in limiting the currents flowing at the outputs of each channel of the device after the given currents reach a predetermined value, in the possibility of changing the level of logical signals supplied to the outputs of the device within a wide range, in the channel-by-channel light indication of the reception of logical signals from the outputs of discrete output channels "dry contact" type and in channel-by-channel light indication when discrete logic signals are applied to the inputs of passive discrete input channels.

A circuit is known that provides the supply of logical signals to the input of passive channels of discrete input, which contains a key, one pole of which is the output of the device, the second pole of the key is connected to the positive pole of the DC voltage source, the negative pole of the voltage source is the common wire of the device and the "common" output of this devices [1]. The disadvantages of this scheme: it provides output logic signals of only one polarity to the output of this device, does not have a light indication of signal input and output, does not limit the output current, cannot change the level of the output logic signal over a wide range, cannot be controlled by a negative level input signal.

There is another scheme for multi-channel reception of control signals and the supply of output discrete signals [2]. This circuit contains a source of constant supply voltage, N identical blocks of switches with galvanic isolation, the inputs of which are connected to the inputs of the device, the positive output of each of the switches with galvanic isolation is connected to the input of one of the N identical blocks of current amplifiers, the common wire of each of the blocks of current amplifiers is connected to the positive pole of the DC supply voltage source, the negative pole of the DC supply voltage source is connected to the negative output of each of the N keys with galvanic isolation and is the “common” output of the device.

This scheme is closest to the scheme of the proposed multi-channel device for picking up and supplying bipolar logic signals and is taken as a prototype. The first disadvantage of this circuit is that it only provides a positive polarity output and cannot provide a negative polarity output at its output relative to the device's "common" output. The second disadvantage of this circuit is that it is controlled from the input of the device only by a positive control logic signal relative to the input "common" and cannot be controlled from the same input of the device also by a negative control logic signal relative to the input "common". The third disadvantage of this scheme is the absence of light indication of the arrival of the input logic signal and light indication of the output logic signal of the device. The fourth disadvantage of this scheme is the inability to set the output current limit in each device channel at the required level. The fifth drawback is that the circuit does not have protection against reverse polarity of the supply voltage.

The purpose of the invention is to provide multi-channel pickup of both positive and negative control logic signals from N channels of a discrete output of the "dry contact" type with a light indication of the reception of a logic signal in each channel, with the possibility of switching the polarity of the supply voltage of these channels, as well as the issuance of output logic signals of both positive and negative polarity from the outputs of the device to the inputs of passive channels of discrete input with the number of channels N with the possibility of limiting the output current at the N outputs of the proposed device at the required level and light indication of the output signals in each channel and the possibility of switching the polarity of the signal voltage at the inputs of discrete input channels, providing the ability to control the level of the output voltage of the logic signal at the outputs over a wide range and providing protection against polarity reversal of the polarity of the external power supply.

To achieve the set goals, in the prototype circuit containing a constant voltage supply, N identical blocks of switches with galvanic isolation, the inputs of which are connected to the inputs of the device, the positive output of each of the switches with galvanic isolation is connected to the input of one of the N blocks of current amplifiers, the common wire of each of the current amplifier blocks is connected to the positive pole of the DC supply voltage source, the negative pole of the DC supply voltage source is connected to the negative output of each of the N switches with galvanic isolation and is the “common” output of the device, additionally introduced: overcurrent (2), the inputs of which are supplied with a positive constant supply voltage from a constant supply voltage source, made in the form of an external source of constant supply voltage with a variable output voltage (1), the block for setting the polarity of the input n discrete input channels voltage (3), the inputs of which are connected to the outputs of the protection unit against overvoltage and polarity reversal of the supply voltage and overcurrent, the voltage stabilization unit of the discrete output channels with galvanic isolation (7), the inputs of which are connected to the inputs of the block for setting the polarity of the input voltage channels discrete input (3), a block for setting the polarity of the voltage supplied to the channels of a discrete output of the "dry contact" type (8), N identical blocks of bipolar DC voltage sources with light indication of the flowing current with current limitation (5), a block of light indication of positive and negative input voltage polarity for discrete input channels (4), a block of light indication of positive and negative voltage polarity of discrete output channels (9), connected in such a way that the positive output of the block for setting the input voltage polarity of discrete input channels (3) is connected to inputs N two identical blocks bipolar DC voltage sources with light indication of flowing current with current limitation (5) through diodes (29, 37) installed in these blocks, the outputs of N identical blocks of bipolar DC voltage sources with light indication of flowing current with current limitation are connected to the inputs of N identical blocks of switches with galvanic isolation (6), made in the form of N identical blocks of bidirectional bipolar switches with galvanic isolation, and the negative output of the block for setting the polarity of the input voltage of discrete input channels (3) is connected to N outputs "common", which are the outputs "common » device, while the positive output of the block for setting the polarity of the voltage supplied to the channels of the discrete output of the “dry contact” type (8) is connected to the N inputs of the current amplifier blocks (10), made in the form of N blocks of bidirectional bipolar current amplifiers with light indication of the flowing current, and the negative output of the polarity setting block to voltage supplied to the channels of a discrete output of the “dry contact” type (8), is connected to the “common” output of N blocks of bidirectional bipolar current amplifiers with light indication of the flowing current (10), which are the inputs of the “common” device and is connected to N negative inputs N bidirectional bipolar switches with galvanic isolation (6), which are control inputs, and N outputs of blocks of bidirectional bipolar current amplifiers with light indication of the flowing current are connected respectively to N positive inputs, which are control inputs of bidirectional bipolar switches with galvanic isolation, where N is the number of discrete channels output and discrete input channels, which serves the described multi-channel device for picking up and supplying bipolar logical signals, while:

1. each of the N blocks of bidirectional bipolar switches with galvanic isolation contains a diode bridge connected to the input of an optocoupler made in the form of two controlled key elements connected in opposite series, a resistor connected in parallel to the control input of the controlled key elements and two bidirectional TVS diodes connected to each of the outputs of the control element with one output, the second outputs of each of the bidirectional TVS diodes are connected to a common wire of the switched signal;

2. each of the N blocks of bipolar constant voltage sources with light indication of the flowing current with current limitation is made in the form of two parallel branches, at the inputs of which two multidirectional diodes are installed, connected to the input of the block through a self-restoring fuse, each branch contains two bipolar transistors and two resistors connected according to the scheme with parallel current feedback, as well as an LED, a unidirectional TVS diode, installed in different directions;

3. each of the N blocks of bidirectional bipolar current amplifiers with light indication of the flowing current is made in the form of two parallel branches with a common control input, each of the branches contains two identically directed diodes, and one of the diodes of each branch is connected through a self-restoring fuse to the input of the block, the other the diode of each branch is connected to the output of the block, a bidirectional TVS diode is connected between the control input and the common wire of the block, and the diodes in different branches are installed in different directions;

4. The voltage stabilization unit of discrete output channels with galvanic isolation is made in the form of an input filter capacitor, a DC-DC converter with galvanic isolation, a resistor for adjusting the output voltage of a DC-DC converter with galvanic isolation, a capacitor for the output filter of a DC-DC converter with galvanic isolation, a resistor , a voltage regulator with the ability to adjust the output voltage, a tuning resistor for setting the output voltage of the voltage regulator, a resistor, a capacitor of the output filter of the voltage regulator;

5. the block for setting the polarity of the input voltage of the channels of the discrete input (3) is connected to the block of light indication of the positive and negative polarity of the input voltage for the channels of the discrete input (4);

6. the block for setting the polarity of the voltage supplied to the channels of the discrete output of the “dry contact” type (8) is connected to the block for light indication of the positive and negative polarity of the voltage of the channels of the discrete output (9);

7. The voltage range of the level of regulated logic signals of an external DC voltage source is from minus 24 to minus 1.8 V with a negative polarity of the logic signal and from 1.8 to 24 V with a positive polarity of the logic signal.

Achievable technical results are provided by the full set of these essential features, i.e. both by constructing the entire device circuit, and its individual blocks. Ensuring multi-channel pickup of both positive and negative, i.e. bipolar, control logical signals from discrete output channels of the "dry contact" type due to the fact that the condition of passing signals through the blocks of the circuit without distortion and restrictions is technically solved.

The circuit is made in the form of two independent sections of the circuit connected by control signals, the first section of the circuit is responsible for supplying logic signals to the outputs of the device, and the second section of the circuit is responsible for supplying voltage to the channels of a discrete output of the "dry contact" type from an external source of constant voltage supply with variable output voltage.

The supply voltage of the first section of the circuit is provided by an external source of constant voltage supply with a variable output voltage (1) and determines the level of logical signals at the N outputs of the device, that is, at the inputs of N discrete input channels. The supply and switching off of the output logic signals to the outputs of the device is carried out by controlling bidirectional, bipolar switches with galvanic isolation (6.1-6.N) from the inputs of N blocks of bidirectional bipolar current amplifiers with light indication of the flowing current (10.1-10.N), and the polarity signals at the outputs of the device is set by the block for setting the polarity of the input voltage (3) supplied to the discrete input channels, through N blocks of bipolar voltage sources with light indication of the flowing current with current limitation (5.1-5.N) and through N blocks of bidirectional bipolar switches with galvanic isolation (6.1-6.N).

Each of the N blocks of bipolar constant voltage sources with light indication of the flowing current with current limitation (5) is made in the form of two parallel branches, at the inputs of which two multidirectional diodes are installed, connected to the input of the block through a self-restoring fuse, each branch contains two bipolar transistors and two resistors connected according to a scheme with parallel current feedback, as well as an LED, a unidirectional TVS diode, installed in different directions and provides current flow in both positive and negative directions to N blocks of bidirectional bipolar switches with galvanic isolation, and limitation on current, which is provided by choosing the value of the resistance of resistors 33 and 41 connected in parallel to the p-n junctions of bipolar transistors 32 and 40, respectively (Fig. 5).

Each of the N blocks of bidirectional bipolar switches with galvanic isolation (6) contains a diode bridge connected to the input of an optocoupler made in the form of two controlled key elements connected in opposite series, a resistor connected in parallel to the control input of the controlled key elements and two bidirectional TVS diodes, connected to each of the outputs of the control element with one output, the second outputs of each of the bidirectional TVS diodes are connected to the common wire of the switched signal and ensures the signal passes in two directions, and the polarity of the key control signals can be both positive and negative due to the use of a diode bridge .

The second section of the circuit is responsible for supplying the supply voltage to the channels of the discrete output of the “dry contact” type from an external source of constant voltage supply with a variable output voltage (1) through the voltage stabilization unit (7), the voltage polarity setting unit (8) supplied to the channels discrete output and N blocks of bidirectional bipolar current amplifiers with light indication of the flowing current (10) and the passage of a logical signal from the inputs of the circuit to the control inputs of N blocks of bidirectional bipolar switches with galvanic isolation (6). The voltage stabilization unit in this section of the circuit provides galvanic isolation of the discrete output channels from the power source and from the discrete input channels and the possibility of supplying both positive and negative voltages to the discrete output channels of the "dry contact" type, regardless of the voltage polarity of the logic signals applied to the channels discrete input.

Each of the N blocks of bidirectional bipolar current amplifiers with light indication of the flowing current is made in the form of two parallel branches with a common control input, each of the branches contains two identically directed diodes, and one of the diodes of each branch is connected through a self-restoring fuse to the input of the block, the other diode of each branch is connected to the output of the block, a bidirectional TVS diode is connected between the control input and the common wire of the block, and the diodes in different branches are installed in different directions.

The level of the logic signal is determined by the voltage of the external DC supply voltage source with a variable output voltage and also depends on the parameters and ratings of the electronic elements of the device and the parameters of the external power supply. The level is determined by the fact that the construction of the circuit and individual blocks of the device described above ensures the range of the logical signal in both the positive and negative regions. The proposed scheme of a multichannel device for picking up and supplying bipolar logic signals allows you to receive inputs and output signals of both positive and negative polarity, adjust the voltage level of output logic signals from 1.8 to 24 V and from minus 24 V to minus 1.8 AT.

In FIG. 1 shows a block diagram of the claimed multi-channel device for picking up and supplying bipolar logical signals, and then in the drawings of FIG. 2-fig. 10 shows examples of the execution of each block.

In the drawing of FIG. 1 and further in the text blocks are indicated:

1 - external source of constant supply voltage with variable output voltage;

2 - block of protection against excess and reversal of supply voltage and overcurrent;

3 - block for setting the polarity of the input voltage of the discrete input channels;

4 - block of light indication of positive and negative input voltage polarity for discrete input channels;

5 - block of bidirectional bipolar DC voltage sources with light indication of the flowing current with current limitation

6 - block of bidirectional bipolar switches with galvanic isolation from 1 to N;

7 - voltage stabilization unit for discrete output channels with galvanic isolation;

8 - block for setting the polarity of the voltage supplied to the channels of the discrete output of the "dry contact" type;

9 - block of light indication of positive and negative voltage polarity of discrete output channels;

10 - block of bidirectional bipolar current amplifiers with light indication of the flowing current from 1 to N.

The device contains an external source of constant voltage supply with a variable output voltage (1), which is the input of the proposed device and is connected to the block for protection against overvoltage and reversal of the supply voltage and overcurrent (2), the block for switching the polarity of the input voltage of the discrete input channels (3) , the input of which is connected to the output of the protection unit against overvoltage and polarity reversal of the supply voltage and overcurrent (2) and to the input of the voltage stabilizer unit of discrete output channels with galvanic isolation (7), the unit of light indication of positive and negative input voltage polarity for discrete input channels (4), the input of which is connected to the output of the block for switching the polarity of the input voltage of the discrete input channels (3) and the inputs of bidirectional bipolar DC voltage sources with output current level limitation and with light indication of the flowing current (5.1-5.N), connected to the bidirectional blocks d bipolar switches with galvanic isolation (6.1-6.N), the outputs of which are the outputs of the proposed device, the control input of each block of bidirectional bipolar switches with galvanic isolation (6.1-6.N) is connected to the corresponding output of the block of bidirectional bipolar current amplifiers with light indication of the flowing current (10.1-10.N), a block for voltage stabilization of channels of a discrete output with galvanic isolation (7), a block for switching the polarity of the voltage supplied to the channels of a discrete output of the “dry contact” type (8), the input of which is connected to the output of a voltage stabilization block for channels digital output with galvanic isolation (7), block of light indication of positive and negative voltage polarity of the channels of the discrete output (9), the input of which is connected to the output of the block for switching the polarity of the voltage supplied to the channels of the discrete output of the "dry contact" type (8), blocks of bidirectional bipolar current amplifiers with light indication th flowing current (10.1-10.N), all inputs of which are connected to the output of the block of light indication of positive and negative polarity of the voltage of the discrete output channels (9), each input of the block of bidirectional bipolar current amplifiers with light indication of the flowing current (10.1-10.N ) is connected to one of the outputs of the discrete output channels of the "dry contact" type and is one of the inputs of the proposed device, where N is the number of discrete output channels and discrete input channels that serves the described multi-channel device for picking up and supplying bipolar logical signals.

The following examples confirm, but do not limit the present invention.

In FIG. Figure 2 shows an example of the implementation of a protection block circuit against overvoltage and polarity reversal of the supply voltage and overcurrent. The circuit contains: resettable fuse 11, device power switch 12, Schottky diode 13, unidirectional TVS diode 14.

In FIG. Figure 3 shows an example of the implementation of the block diagram for setting the polarity of the input voltage of the discrete input channels. The circuit contains a dual switch for two positions 15.

In FIG. Figure 4 shows an example of the implementation of the block diagram of the light indication of the positive and negative polarity of the input voltage for discrete input channels. The circuit contains: diodes 17, 26, stable current source chips 18, 25, set by external elements, current-setting resistors 9, 24, resistors 20, 23, limiting the power dissipation of stable current source chips, turquoise LED 21, orange LED 22, unidirectional TVS diodes 16, 27.

In FIG. Figure 5 shows an example of the implementation of a block diagram of a bidirectional bipolar DC voltage source with a light indication of the flowing current. The circuit contains: capacitor 28, diodes 29, 37, resistors 30, 33, 35, 38, 41, 43, NPN transistors 31, 32, PNP transistors 39, 40, green LED 34, red LED 42, unidirectional TVS diodes 36, 44 , resettable fuse 45.

In FIG. 6 shows an example of the implementation of a block diagram of a bidirectional bipolar switch with galvanic isolation. The circuit contains: a diode bridge 46, a resistor 47, a key chip with galvanic isolation 34, bidirectional TVS diodes 49, 50.

Figure 7 shows an example of the implementation of the voltage stabilization unit circuit for discrete output channels with galvanic isolation. The circuit contains: galvanic isolation DC-DC converter input filter capacitor 51, galvanic isolation DC-DC converter 52, galvanic isolation DC-DC converter output voltage adjustment resistor 53, galvanic isolation DC-DC converter output filter capacitor 54, resistor 55, a voltage regulator with the ability to adjust the output voltage 56, a tuning resistor for setting the output voltage of the voltage regulator 57, a resistor 59, a voltage regulator output filter capacitor 58.

Figure 8 shows an example of the implementation of the block diagram for setting the polarity of the voltage supplied to the channels of the discrete output of the "dry contact" type. The circuit contains: a paired two-position switch 60, a unidirectional TVS diode 61.

In FIG. Figure 9 shows an example of the implementation of the block diagram of the light indication of the positive and negative polarity of the voltage of the channels of the discrete output. The circuit contains: diodes 63, 72, microcircuits of stable current sources set by external elements 64, 71, current-setting resistors 65, 70, resistors limiting the power dissipation of microcircuits of stable current sources 66, 69, white LED 67, purple LED 68, unidirectional TVS diodes 62, 73.

In FIG. 10 shows an example of the implementation of a block diagram of a bidirectional bipolar current amplifier with a light indication of the flowing current. The circuit contains: capacitor 74, diodes 75, 83, 85, 92, bidirectional TVS diode 78, resistors 76, 77, 79, 81, 86, 87, 89, 88, PNP transistor 80, yellow LED 82, unidirectional TVS diodes 84, 93, NPN transistor 90, blue LED 91, resettable fuse 94.

Multi-channel pickup and supply of bipolar logic signals operates as follows. Input logic signals from N outputs of discrete output modules of the "dry contact" type or from N sensors of the "dry contact" type come to the inputs of the block of bidirectional bipolar current amplifiers with light indication of the flowing current (10.1-10.N). The signals are amplified by current amplifiers with light indication of the flowing current (10.1-10.N), after which the amplified current signals enter the control inputs of the blocks of bidirectional bipolar switches with galvanic isolation (6.1-6.N) and cause them to operate. When bidirectional bipolar switches with galvanic isolation (6.1-6.N) are triggered, the signal in the form of a voltage pulse from the outputs of bidirectional bipolar DC voltage sources with light indication of the flowing current and limiting the flowing current (5.1-5.N) gets to N inputs of discrete input channels and trigger discrete input channels.

The device provides various light indications of the input logic signal from the discrete output channel of the "dry contact" type, both with positive and negative supply voltage of the discrete output channel of the "dry contact" type to the inputs of the device and various light indications of the flow of output current when logic signals are applied positive and negative polarity to the inputs of discrete input channels.

The device allows you to use four modes of operation:

- positive voltage at N outputs of discrete output modules of the "dry contact" type and positive polarity of logical signals at the inputs of discrete input modules;

- negative voltage at N outputs of discrete output modules of the "dry contact" type and negative polarity of logical signals at the inputs of discrete input modules;

- positive voltage at N outputs of discrete output modules of the "dry contact" type and negative polarity of logical signals at the inputs of discrete input modules;

- negative voltage at N outputs of discrete output modules of the "dry contact" type and positive polarity of logic signals at the inputs of discrete input modules.

Using the block diagram of the device proposed in the application, a module was made for testing discrete I/O channels.

The following set of parameters has been obtained:

number of tested discrete output channels 16,

number of tested discrete input channels 16,

logic signal level at the inputs of discrete input channels:

from minus 24 to minus 1.8 V with a negative polarity of the logical signal and

1.8 to 24 V with positive logic signal polarity,

multi-colored light indication when signals of positive and negative polarity are applied both to the input and output of the proposed device circuit.

Sources of information

1. Rybakov S.I., Alekseev K.A. Circuitry of discrete input-output modules of programmable logic controllers. Actual problems of aviation and astronautics, volume 1, no. 12, 2016, pp. 711-713.

Fig. 2. Scheme of the interface block of the LPN port of the PC with the block of electrically controlled valves of the robotic manipulator RF-202M.

https://studbooks.net/2341073/tehnika/blok_elktricheskih_klyuchey

Claims (8)

1. A multi-channel device for picking up and supplying bipolar logical signals, containing a source of constant voltage supply, N identical blocks of switches with galvanic isolation (6), the inputs of which are connected to the inputs of the device, the positive output of each of the switches with galvanic isolation is connected to the input of one of N identical blocks of current amplifiers (10), the common wire of each of the blocks of current amplifiers is connected to the positive pole of the DC supply voltage source, the negative pole of the DC supply voltage source is connected to the negative terminal of each of the N switches with galvanic isolation and is the “common” output of the device, which differs in that , which is additionally introduced: a protection unit against overvoltage and polarity reversal of the supply voltage and overcurrent (2), the inputs of which are supplied with a positive constant supply voltage from a constant supply voltage source, made in the form of an external constant supply voltage source with a change output voltage (1), a block for setting the polarity of the input voltage of the discrete input channels (3), the inputs of which are connected to the outputs of the block for protection against overvoltage and polarity reversal of the supply voltage and overcurrent, the voltage stabilization unit for the channels of the discrete output with galvanic isolation (7), the inputs of which are connected to the inputs of the block for setting the polarity of the input voltage of the discrete input channels, the block for setting the polarity of the voltage supplied to the channels of the discrete output of the "dry contact" type (8), N identical blocks of bipolar DC voltage sources with light indication of the flowing current with current limitation ( 5), block of light indication of positive and negative polarity of input voltage for discrete input channels (4), block of light indication of positive and negative polarity of voltage of channels of discrete output (9), connected in such a way that the positive output of the block for setting the polarity of input voltage channels specific input (3) is connected to the inputs of N identical blocks of bipolar DC voltage sources with light indication of the flowing current with current limitation (5) through diodes (29, 37) installed in these blocks, the outputs of N identical blocks of bipolar DC voltage sources with light indication of the flowing current with current limitation are connected to the inputs of N identical blocks of switches with galvanic isolation (6), made in the form of N identical blocks of bidirectional bipolar switches with galvanic isolation, and the negative output of the block for setting the polarity of the input voltage of the discrete input channels (3) is connected to N outputs of the "common" keys with galvanic isolation (6), which are the outputs of the "common" device, while the positive output of the block for setting the polarity of the voltage supplied to the channels of the discrete output of the "dry contact" type (8) is connected to the N inputs of the current amplifier blocks (10), made in the form of N blocks of bidirectional bipolar amplifier current with a light indication of the flowing current, and the negative output of the block for setting the polarity of the voltage supplied to the channels of the discrete output of the “dry contact” type (8) is connected to the “common” output of N blocks of bidirectional bipolar current amplifiers with a light indication of the flowing current (10) , which are inputs of the "common" device, and is connected to N negative inputs of N bidirectional bipolar switches with galvanic isolation (6), which are control inputs, and N outputs of blocks of bidirectional bipolar current amplifiers with light indication of the flowing current are connected, respectively, to N positive inputs, which are control inputs of bidirectional bipolar switches with galvanic isolation, where N is the number of discrete output channels and discrete input channels that serves the described multi-channel device for picking up and supplying bipolar logic signals. 2. A multi-channel device for picking up and supplying bipolar logic signals according to claim 1, characterized in that each of the N blocks of bidirectional bipolar switches with galvanic isolation contains a diode bridge connected to the input of an optocoupler made in the form of two controlled key elements connected in opposite series , a resistor connected in parallel to the control input of controlled key elements, and two bidirectional TVS diodes connected to each of the outputs of the control element with one output, the second outputs of each of the bidirectional TVS diodes are connected to a common wire of the switched signal. 3. A multi-channel device for picking up and supplying bipolar logic signals according to claim 1, characterized in that each of the N blocks of bipolar DC voltage sources with light indication of the current flowing with current limitation is made in the form of two parallel branches, at the inputs of which two multidirectional diodes are installed (29, 37) connected to the input of the block through a self-restoring fuse, each branch contains two bipolar transistors and two resistors connected according to a parallel current feedback circuit, as well as an LED, a unidirectional TVS diode, installed in different directions. 4. A multi-channel device for picking up and supplying bipolar logic signals according to claim 1, characterized in that each of the N blocks of bidirectional bipolar current amplifiers with a light indication of the flowing current is made in the form of two parallel branches with a common control input, each of the branches contains two identically directed diode, and one of the diodes of each branch is connected through a resettable fuse to the input of the block, the other diode of each branch is connected to the output of the block, a bidirectional TVS diode is connected between the control input and the common wire of the block, and the diodes in different branches are installed in different directions. 5. A multi-channel device for picking up and supplying bipolar logic signals according to claim 1, characterized in that the voltage stabilization unit of the discrete output channels with galvanic isolation is made in the form of an input filter capacitor, a DC-DC converter with galvanic isolation, a resistor for adjusting the DC-DC output voltage converter with galvanic isolation, output filter capacitor DC-DC converter with galvanic isolation, resistor, voltage regulator with the ability to adjust the output voltage, trimmer resistor for setting the output voltage of the voltage stabilizer, resistor, output filter capacitor of the voltage stabilizer. 6. A multi-channel device for picking up and supplying bipolar logic signals according to claim 1, characterized in that the block for setting the polarity of the input voltage of the channels of the discrete input (3) is connected to the block of light indication of the positive and negative polarity of the input voltage for the channels of the discrete input (4). 7. A multi-channel device for picking up and supplying bipolar logic signals according to claim 1, characterized in that the block for setting the polarity of the voltage supplied to the channels of the discrete output of the “dry contact” type (8) is connected to the block for light indication of the positive and negative polarity of the voltage of the channels of the discrete output (9). 8. A multi-channel device for picking up and supplying bipolar logic signals according to claim 1, characterized in that the voltage range of the level of adjustable logic signals of an external DC voltage source is from minus 24 to minus 1.8 V with a negative polarity of the logic signal and from 1.8 to 24 V with positive logic signal polarity.

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