A circuit isolation device

Abstract

The utility model discloses a circuit isolation device, comprising: a relay, the relay comprising an input end and an output end, the input end comprising a first input end and a second input end, the output end comprising a first output end and a second output end, an input signal of the first input end being converted into an output signal of the first output end, and an input signal of the second input end being converted into an output signal of the second output end; an external circuit board, the external circuit board being connected to the first input end and the second output end; an internal control circuit, the internal control circuit being connected to the first output end and the second input end; the relay can also be used to isolate an external circuit from an internal circuit, so as to avoid the external circuit being affected when a fault occurs in the internal control circuit, or to avoid the internal control circuit being affected when a fault occurs in the external circuit, thereby achieving a protective effect on the internal control circuit and the external circuit.

Description

Technical Field

[0001] The utility model relates to the technical field of isolation circuits, in particular to a circuit isolation device. Background Art

[0002] In the current use of plasma cleaning devices, external circuits are usually required to participate in the control, so there may be problems with the control of signals. In addition, the external circuit and the circuit in the plasma cleaning device are not isolated. Once a fault occurs in one of them, the other will also be affected or even damaged. Utility Model Content

[0003] In order to overcome the above shortcomings, the purpose of the utility model is to provide a circuit isolation device. The relay can also be used to isolate the external circuit from the internal circuit, so as to avoid the external circuit being affected when the internal control circuit fails, or to avoid the internal control circuit being affected when the external circuit fails, thereby achieving the protection effect of the internal control circuit and the external circuit.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is: a circuit isolation device, comprising:

[0005] A relay, the relay comprising an input end and an output end, the input end comprising a first input end and a second input end, the output end comprising a first output end and a second output end, an input signal of the first input end being converted into an output signal of the first output end, and an input signal of the second input end being converted into an output signal of the second output end;

[0006] An external circuit board, the external circuit board is connected to the first input end and the second output end;

[0007] An internal control circuit is connected to the first output terminal and the second input terminal.

[0008] In this technical solution, when the external circuit communicates with the internal control circuit, the relay converts the external input signal into a voltage suitable for the internal control circuit, so as to facilitate the internal control circuit to identify it, and at the same time converts the signal sent by the internal control circuit to the external circuit into a voltage suitable for the external circuit, so as to facilitate the external circuit to identify it, thereby completing the information exchange; and, the relay can also be used to isolate the external circuit from the internal circuit, to prevent the external circuit from being affected when the internal control circuit fails, or to prevent the internal control circuit from being affected when the external circuit fails, thereby achieving the protection effect of the internal control circuit and the external circuit; the external circuit board is used to connect the external circuit and the relay, and the internal control circuit is used to complete the set signal processing.

[0009] In some embodiments, the circuit isolation device also includes a normally closed power supply and a ground wire, the relay also includes a normally open end and a normally closed end, the normally open end includes a first normally open end and a second normally open end, the normally closed end includes a first normally closed end and a second normally closed end, the first normally closed end and the second normally open end are connected to the external circuit board, the second normally open end is connected to the ground wire, and the second normally closed end is connected to the normally closed power supply.

[0010] In this technical solution, the first input terminal and the first normally closed terminal serve as input signals of the relay, which are converted into output signals of the relay through the relay. The first normally closed terminal is connected to an external circuit board, which is conducive to controlling the size of the signal voltage of the first input terminal from the external circuit. The first normally open terminal is used to set the voltage of the signal of the first output terminal. The first normally open terminal is connected to the ground wire, which is conducive to unifying the internal voltage of the circuit isolation device; the second input terminal and the second normally closed terminal serve as input signals of the relay, which are converted into output signals of the relay through the relay. The second normally closed terminal is connected to a normally closed power supply, which is conducive to unifying the signal voltage transmitted by the first output terminal inside the circuit isolation device. The second normally open terminal is connected to an external circuit board, which is conducive to controlling the size of the signal voltage of the second output terminal through the external circuit, so that the external circuit can parse the signal sent by the acquired second output terminal.

[0011] In some embodiments, the internal control circuit includes a programmable controller, and the programmable controller includes a signal input terminal and a signal output terminal, the signal input terminal is connected to the first output terminal, and the signal output terminal is connected to the second input terminal.

[0012] In this technical solution, the first output terminal is connected to the signal input terminal of the programmable controller, which is conducive to converting the signal of the external circuit into the control signal of the programmable controller through the relay, thereby controlling the effect of the external device connected to the circuit isolation device through the external circuit; the signal output terminal of the programmable controller is connected to the second input terminal, which is conducive to feeding back the control state of the external device controlled by the circuit isolation device to the external circuit.

[0013] In some embodiments, the external circuit board includes a high level terminal, and the high level terminal is connected to the first normally closed terminal.

[0014] In this technical solution, the high level end is connected to the first normally closed end, which is beneficial to the effect of setting the size of the signal voltage required by the first input end from the external circuit.

[0015] In some implementations, the external circuit board further includes a low level end, and the low level end is connected to the second normally open end.

[0016] In this technical solution, the low level end is connected to the second normally open end, which is beneficial to the effect of setting the size of the signal voltage output from the second output end from the external circuit.

[0017] In some embodiments, the external circuit board further includes an external input terminal, and the external input terminal is connected to the first input terminal.

[0018] In this technical solution, the external input terminal is connected to the first input terminal, which is conducive to controlling the signal output of the first output terminal from the external circuit, thereby achieving the effect of controlling the programmable controller.

[0019] In some embodiments, the external circuit board further includes an external output terminal, and the external output terminal is connected to the second output terminal.

[0020] In this technical solution, the external output terminal is connected to the second output terminal, which is conducive to obtaining the state of the external device controlled by the programmable controller from the external circuit.

[0021] The beneficial effect of the utility model is that by utilizing the first input terminal and the first normally closed terminal as the input signal of the relay, the first normally closed terminal is connected to the external circuit board, which is conducive to controlling the size of the signal voltage of the first input terminal from the external circuit, and utilizing the second normally open terminal to connect the external circuit board is conducive to controlling the size of the signal voltage of the second output terminal through the external circuit, so that the external circuit can parse the signal sent by the acquired second output terminal; at the same time, the relay can also be used to isolate the external circuit from the internal circuit, and when the internal control circuit fails, the external circuit is prevented from being affected, or when the external circuit fails, the internal control circuit is prevented from being affected, thereby achieving the protection effect of the internal control circuit and the external circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structural connection of a circuit isolation device according to an embodiment of the utility model;

[0023] Figure 2 A schematic diagram of a relay of a circuit isolation device according to an embodiment of the utility model;

[0024] Figure 3 This is a circuit connection diagram of a circuit isolation device according to an embodiment of the utility model;

[0025] In the figure: a, first input terminal; b, second input terminal; c, first output terminal; d, second output terminal; e, first normally closed terminal; f, second normally closed terminal; g, first normally open terminal; h, second normally open terminal; i, relay; j, external circuit board; k, programmable controller. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0027] Combined with Figure 1 To Attachment Figure 3 As shown, the utility model provides a circuit isolation device comprising:

[0028] A relay i, wherein the relay i comprises an input end and an output end, wherein the input end comprises a first input end a and a second input end b, and the output end comprises a first output end c and a second output end d, wherein an input signal of the first input end a is converted into an output signal of the first output end c, and an input signal of the second input end b is converted into an output signal of the second output end d;

[0029] An external circuit board j, wherein the external circuit board j is connected to the first input terminal a and the second output terminal d;

[0030] An internal control circuit, wherein the internal control circuit is connected to the first output terminal c and the second input terminal b.

[0031] When the external circuit communicates with the internal control circuit, relay i converts the external input signal into a voltage suitable for the internal control circuit, so as to facilitate the internal control circuit to identify it, and at the same time converts the signal sent by the internal control circuit to the external circuit into a voltage suitable for the external circuit, so as to facilitate the external circuit to identify it, thereby completing the information exchange; and, relay i can also be used to isolate the external circuit from the internal circuit, to avoid the external circuit being affected when the internal control circuit fails, or to avoid the internal control circuit being affected when the external circuit fails, thereby achieving the protection effect of the internal control circuit and the external circuit; the external circuit board j is used to connect the external circuit and relay i, and the internal control circuit is used to complete the set signal processing.

[0032] Continue to combine Figure 1 and attached Figure 2 As shown, in some embodiments, the circuit isolation device also includes a normally closed power supply and a ground wire, the relay i also includes a normally open end and a normally closed end, the normally open end includes a first normally open end g and a second normally open end h, the normally closed end includes a first normally closed end e and a second normally closed end f, the first normally closed end e and the second normally open end h are connected to the external circuit board j, the second normally open end h is connected to the ground wire, and the second normally closed end f is connected to the normally closed power supply.

[0033] The first input terminal a and the first normally closed terminal e serve as input signals of the relay i, which are converted into signals output by the relay i. The first normally closed terminal e is connected to an external circuit board j, which is conducive to controlling the magnitude of the signal voltage of the first input terminal a from the external circuit. The first normally open terminal g is used to set the voltage of the signal of the first output terminal c. The first normally open terminal g is connected to the ground wire, which is conducive to unifying the internal voltage of the circuit isolation device; the second input terminal b and the second normally closed terminal f serve as input signals of the relay i, which are converted into signals output by the relay i through the relay i. The second normally closed terminal f is connected to a normally closed power supply, which is conducive to unifying the signal voltage transmitted by the first output terminal c inside the circuit isolation device. The second normally open terminal h is connected to an external circuit board, which is conducive to controlling the magnitude of the signal voltage of the second output terminal d through the external circuit, so that the external circuit can analyze the signal sent by the second output terminal d.

[0034] Combined with Figure 2 and attached Figure 3 As shown, pin 4 is the first input terminal a, pin 12 is the first output terminal c, pin 8 is the first normally closed terminal e, and pin 16 is the first normally open terminal g. Pin 8 of the input terminal of relay i is connected to the high level terminal on the external circuit board, and pin 4 is connected to the external circuit board j. When the external circuit board j sends a high level signal to pin 4, pin 12 of relay i will generate a signal voltage, and the signal voltage is transmitted to the signal input terminal of the programmable controller k, thereby controlling the programmable controller k; pin 1 is the second input terminal b, pin 9 is the second output terminal d, pin 5 is the second normally closed terminal f, and pin 13 is the second normally open terminal h. Pin 5 of the input terminal of relay i is connected to the normally closed power supply, pin 1 is the second input terminal b, and pin 1 is connected to the programmable controller k. When pin 1 sends a high level signal, pin 9 will generate a signal transmitted to the external circuit board j, so that the external circuit obtains the feedback signal of the programmable controller k.

[0035] Continue to combine Figure 1 To Attachment Figure 3 As shown, in some embodiments, the internal control circuit includes a programmable controller k, and the programmable controller k includes a signal input terminal and a signal output terminal, the signal input terminal is connected to the first output terminal c, and the signal output terminal is connected to the second input terminal b.

[0036] The first output terminal c is connected to the signal input terminal of the programmable controller k, which is conducive to converting the signal of the external circuit into a control signal of the programmable controller k through the relay i, thereby controlling the effect of the external device connected to the circuit isolation device through the external circuit; the signal output terminal of the programmable controller k is connected to the second input terminal b, which is conducive to feeding back the control state of the external device controlled by the circuit isolation device to the external circuit.

[0037] Continue to combine Figure 1 and attached Figure 2 As shown, in some embodiments, the external circuit board j includes a high level terminal, and the high level terminal is connected to the first normally closed terminal e, which is beneficial to the effect of setting the size of the signal voltage required for the first input terminal a from the external circuit.

[0038] Continue to combine Figure 1 and attached Figure 2 As shown, in some embodiments, the external circuit board j also includes a low level end, and the low level end is connected to the second normally open end h, which is beneficial to the effect of setting the size of the signal voltage output from the second output end d from the external circuit.

[0039] Continue to combine Figure 1 and attached Figure 2 As shown, in some embodiments, the external circuit board j also includes an external input terminal, which is connected to the first input terminal a, which is conducive to controlling the signal output of the first output terminal c from the external circuit, thereby achieving the effect of controlling the programmable controller k.

[0040] Continue to combine Figure 1 and attached Figure 2 As shown, in some embodiments, the external circuit board j also includes an external output terminal, which is connected to the second output terminal d, so as to facilitate obtaining the state of the external device controlled by the programmable controller k from the external circuit.

[0041] In summary, the utility model provides a circuit isolation device, which utilizes a first input terminal and a first normally closed terminal as input signals of a relay, and the first normally closed terminal is connected to an external circuit board, which is conducive to controlling the magnitude of the signal voltage of the first input terminal from an external circuit, and utilizing the second normally open terminal to connect to an external circuit board, which is conducive to controlling the magnitude of the signal voltage of the second output terminal through an external circuit, so that the external circuit can parse the signal sent by the acquired second output terminal; at the same time, the relay can also be used to isolate the external circuit from the internal circuit, and when the internal control circuit fails, the external circuit is prevented from being affected, or when the external circuit fails, the internal control circuit is prevented from being affected, thereby achieving the protection effect of the internal control circuit and the external circuit.

[0042] The above implementation modes are only for illustrating the technical concept and features of the utility model, and their purpose is to allow people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A circuit isolation device, characterized in that: include: A relay, the relay comprising an input end and an output end, the input end comprising a first input end and a second input end, the output end comprising a first output end and a second output end, an input signal of the first input end being converted into an output signal of the first output end, and an input signal of the second input end being converted into an output signal of the second output end; An external circuit board, the external circuit board is connected to the first input end and the second output end; An internal control circuit is connected to the first output terminal and the second input terminal.

2. The circuit isolation device according to claim 1, characterized in that: It also includes a normally closed power supply and a ground wire, and the relay also includes a normally open end and a normally closed end, the normally open end includes a first normally open end and a second normally open end, the normally closed end includes a first normally closed end and a second normally closed end, the first normally closed end and the second normally open end are connected to the external circuit board, the second normally open end is connected to the ground wire, and the second normally closed end is connected to the normally closed power supply.

3. The circuit isolation device according to claim 1, characterized in that: The internal control circuit includes a programmable controller, and the programmable controller includes a signal input terminal and a signal output terminal. The signal input terminal is connected to the first output terminal, and the signal output terminal is connected to the second input terminal.

4. The circuit isolation device according to claim 2, characterized in that: The external circuit board includes a high level terminal, and the high level terminal is connected to the first normally closed terminal.

5. The circuit isolation device according to claim 2, characterized in that: The external circuit board also includes a low level end, and the low level end is connected to the second normally open end.

6. The circuit isolation device according to claim 2, characterized in that: The external circuit board also includes an external input terminal, and the external input terminal is connected to the first input terminal.

7. The circuit isolation device according to claim 2, characterized in that: The external circuit board also includes an external output terminal, and the external output terminal is connected to the second output terminal.

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