CN219456753U - Control circuit capable of switching passive output and active output - Google Patents
Control circuit capable of switching passive output and active output Download PDFInfo
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- CN219456753U CN219456753U CN202320350719.2U CN202320350719U CN219456753U CN 219456753 U CN219456753 U CN 219456753U CN 202320350719 U CN202320350719 U CN 202320350719U CN 219456753 U CN219456753 U CN 219456753U
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Abstract
The utility model provides a control circuit capable of switching between passive output and active output, which comprises an active control circuit and a passive control circuit, wherein the passive control circuit comprises a relay switch and a first field effect transistor, the first field effect transistor receives a control signal and controls the energization of a coil of the relay switch by the control signal, a first normally open port of the relay switch is connected with a third connecting terminal, and a second normally open port of the relay switch is connected with a fourth connecting terminal; the active control circuit comprises a second field effect tube, the direct current input end is connected with a fifth connecting terminal, the sixth connecting terminal is connected with a third connecting terminal, the fourth connecting terminal is connected with a seventh connecting terminal, the eighth connecting terminal is connected with the second field effect tube, and the second field effect tube receives a control signal and is controlled to be on-off by the control signal; the third connecting terminal and the fourth connecting terminal are output ports. The output port of the present utility model may be an active output port or a passive output port.
Description
Technical Field
The utility model relates to the field of industrial control, in particular to a control circuit capable of switching between passive output and active output.
Background
In the field of industrial control, control devices typically use dry and wet contacts when receiving signals or when sending control signals. The dry contact is a passive switch having two states, closed and open, and the two contacts on both sides of the dry contact are not polarized. The wet contact is an active switch, has two states of electricity and no electricity, and two contacts at two ends of the wet contact have polarities and cannot be connected reversely. The output port of the existing control device is a dry contact or a wet contact, and the output port cannot have the characteristics of both the dry contact and the wet contact.
Disclosure of Invention
It is a first object of the utility model to provide a control circuit in an output port that switches between passive and active outputs.
In order to achieve the first object, the present utility model provides a control circuit capable of switching between passive output and active output, the control circuit including an active control circuit and a passive control circuit, a dc input terminal outputting an electrical signal to the active control circuit and the passive control circuit; the first input assembly comprises a first connecting terminal, a second connecting terminal and an input terminal, wherein the input terminal receives an external control signal, the first connecting terminal is connected with the active control circuit, and the second connecting terminal is connected with the passive control circuit; the passive control circuit comprises a relay switch and a first field effect tube, wherein the direct current input end is connected with the first end of a coil of the relay switch, the second end of the coil of the relay switch is connected with the first field effect tube, the first field effect tube receives a control signal and controls the energization of the coil of the relay switch by the control signal, a first normally open port of the relay switch is connected with a third connecting terminal, and a second normally open port of the relay switch is connected with a fourth connecting terminal; the active control circuit comprises a second field effect transistor, a fifth connecting terminal, a sixth connecting terminal, a seventh connecting terminal and an eighth connecting terminal; the direct current input end is connected with a fifth connecting terminal, the sixth connecting terminal is connected with a third connecting terminal, the fourth connecting terminal is connected with a seventh connecting terminal, the eighth connecting terminal is connected with a second field effect transistor, and the second field effect transistor receives a control signal and is controlled to be switched on and off by the control signal; the third connecting terminal and the fourth connecting terminal are output ports.
As can be seen from the above solution, the output port of the control circuit provided by the present utility model can be selected as an active output port, i.e. a wet contact, or an output port can be selected as a passive output port, i.e. a dry contact. The output port has two output modes, thereby bringing convenience to the production and manufacture of equipment and the field engineering installation of clients, and having flexible operation and high cost performance.
In a further scheme, a second end of a coil of the relay switch is connected with a drain electrode of the first field effect tube, a grid electrode of the first field effect tube receives a signal of the second connecting terminal, and a source electrode of the first field effect tube is connected with a grounding end; when the passive control circuit works, the input terminal is in short circuit with the second connecting terminal.
Therefore, when the user selects passive output, the input terminal is connected with the second connecting terminal, and the second connecting terminal receives the control signal to control the on-off of the first field effect transistor.
In a further scheme, a grid electrode of the first field effect transistor is connected with a first end of the first resistor, and a second end of the first resistor is connected with the second connecting terminal.
Therefore, the first resistor can prevent the voltage signal received by the grid electrode of the first field effect transistor from being too high so as to break down the first field effect transistor.
In a further scheme, the second end of the first resistor is also connected with the first end of the third resistor, and the second end of the third resistor is connected with the grounding end.
Therefore, the third resistor filters the interference signal for the first field effect transistor, and the first field effect transistor can receive a stable static level.
In a further scheme, a grid electrode of the second field effect transistor receives a signal output by the first connecting terminal, a drain electrode of the second field effect transistor is connected to the eighth connecting terminal, and a source electrode of the second field effect transistor is connected to the grounding terminal; in operation, the active control circuit 12 has an input terminal shorted to the first connection terminal.
Therefore, when the user selects the active output, the input terminal is connected with the first connecting terminal, and the first connecting terminal receives the control signal to control the on-off of the second field effect transistor.
In a further scheme, the grid electrode of the second field effect transistor is connected with the first end of the second resistor, and the second end of the second resistor is connected with the first connecting terminal.
Therefore, the second resistor can prevent the voltage signal received by the grid electrode of the second field effect transistor from being too high so as to break down the second field effect transistor.
In a further scheme, the second end of the second resistor is also connected with the first end of the fourth resistor, and the second end of the fourth resistor is also connected with the grounding end.
Therefore, the fourth resistor filters the interference signal for the second field effect transistor, and the second field effect transistor can receive a stable static level.
In a further aspect, the fifth connection terminal and the sixth connection terminal are second input components; the seventh connection terminal and the eighth connection terminal are third input components.
It can be seen that the second input assembly and the third input assembly can be externally connected with a power supply.
In a further aspect, the first end of the coil of the relay switch and the second end of the coil of the relay switch are also connected with diodes.
It follows that when the coil of the relay switch is de-energized, a reverse potential is generated at the coil and the diode can bleed the corresponding charge.
In a further scheme, a first capacitor and a second capacitor which are connected in parallel are arranged between the direct current input end and the grounding end.
Therefore, the first capacitor and the second capacitor are driving power supply decoupling circuits and are used for filtering interference signals caused by loads connected with the relay or the output port.
Drawings
Fig. 1 is a circuit diagram of a control circuit of the present utility model that switches between passive output and active output.
The utility model is further described below with reference to the drawings and examples.
Detailed Description
Referring to fig. 1, fig. 1 is a circuit diagram of a control circuit of the switchable passive and active outputs of the present utility model. The output port of the present utility model may be selected as an active output port or a passive output port. The control circuit comprises an active control circuit 12 and a passive control circuit 11. The first connection assembly JP2 includes a first connection terminal 1, a second connection terminal 2, and an input terminal 9. The first connection assembly JP2 may be a single row of pins of 1X 3. The input terminal 9 receives a control signal. The output port JP1 includes a third connection terminal 3 and a fourth connection terminal 4. The DC input terminal outputs 24V DC voltage. A first capacitor EC2 and a second capacitor C13 which are connected in parallel are arranged between the direct current input end and the grounding end. The first capacitor EC2 and the second capacitor C13 are driving power decoupling circuits, and are used for filtering interference signals caused by loads connected to the relay or the output port.
The active control circuit 12 includes a second field effect transistor Q2, a fifth connection terminal 5, a sixth connection terminal 6, a seventh connection terminal 7, and an eighth connection terminal 8. The fifth connection terminal 5 and the sixth connection terminal 6 are connection terminals of the second input assembly JP 3; the seventh connection terminal 7 and the eighth connection terminal 8 are connection terminals of the third input assembly JP 4. The second input assembly JP3 and the third input assembly JP4 are single row pins of 1x 2. The direct current input end is connected with the fifth connecting terminal 5, the sixth connecting terminal 6 is connected with the third connecting terminal 3, the fourth connecting terminal 4 is connected with the seventh connecting terminal 7, the eighth connecting terminal 8 is connected with the drain electrode of the second field effect tube Q2, the grid electrode of the second field effect tube Q2 receives the signal of the first connecting terminal 1, and the source electrode of the second field effect tube Q2 is connected with the grounding end. The grid electrode of the second field effect tube Q2 is connected with the first end of the second resistor R13, and the second end of the second resistor R13 is connected with the first connection terminal 1. The second resistor R13 can prevent the voltage signal received by the gate of the second fet Q2 from being too high to breakdown the second fet. The second end of the second resistor R13 is connected with the first end of the fourth resistor R12, and the second end of the fourth resistor R12 is also connected with the ground end. The fourth resistor R12 filters the interference signal for the second fet Q2, and the second fet Q2 can receive a stable static level.
When the active control circuit 12 is in operation, the input terminal 9 is shorted to the first connection terminal 1, the fifth connection terminal 5 is shorted to the sixth connection terminal 6, and the seventh connection terminal 7 is shorted to the eighth connection terminal 8. The first connection terminal 1 may receive the control signal received by the input terminal 9 at this time. When the control signal is a low level signal, the drain and the source of the second fet Q2 are open, and the output port JP1 has no active signal output. When the control signal is a high level signal, the drain and the source of the second fet Q2 are turned on, and the electric signal output from the dc input terminal flows through the fuse F2, the fifth connection terminal 5, the sixth connection terminal 6, the external circuit connected to the output port JP1, the seventh connection terminal 7, the eighth connection terminal 8, the second fet Q2, and the ground terminal. The output port JP1 outputs an active signal. The dc input terminal is not limited to outputting 24 v dc voltage, but may be other dc voltages, and other dc voltage parameters need to be selected to consider the withstand voltage parameter of the second fet Q2.
The passive control circuit 11 includes a relay switch JK1 and a first field effect transistor Q1. The direct current input end is connected with the first end of a coil of a relay switch JK1, the second end of the coil of the relay switch is connected with the drain electrode of a first field effect tube Q1, the grid electrode of the first field effect tube Q1 receives signals of a second connecting terminal 2, the source electrode of the first field effect tube Q1 is connected with the grounding end, a first normally open port of the relay switch is connected with a third connecting terminal 3, and a second normally open port of the relay switch is connected with a fourth connecting terminal 4. The first end of the coil of the relay switch JK1 and the second end of the coil of the relay switch JK1 are also connected with a diode D7. When the coil of the relay switch JK1 is deenergized, a reverse potential is generated in the coil, and the diode D7 can discharge the corresponding charge.
The grid electrode of the first field effect transistor Q1 is connected with the first end of the first resistor R11, and the second end of the first resistor R11 is connected with the second connecting terminal 2. The first resistor can prevent the voltage signal received by the grid electrode of the first field effect transistor from being too high so as to break down the first field effect transistor. The second end of the first resistor R11 is further connected to the first end of the third resistor R10, and the second end of the third resistor R10 is connected to the ground. The third resistor R10 filters the interference signal for the first fet Q1, and the first fet Q1 can receive a stable static level.
When the passive control circuit 11 is operated, the input terminal 9 is short-circuited to the second connection terminal 2, the input terminal 9 is disconnected from the first connection terminal 1, the fifth connection terminal 5 and the sixth connection terminal 6 are disconnected, and the seventh connection terminal 7 and the eighth connection terminal 8 are disconnected. The first field effect transistor Q1 receives the control signal and controls the energization of the coil of the relay switch by the control signal. When the control signal is a low-level signal, the drain electrode and the source electrode of the first field effect transistor Q1 are opened, the coil of the relay switch JK1 is not electrified, and the normally open switch of the relay switch JK1 is in a normally open state, so that the loop of an external circuit connected with the output port JP1 is disconnected. When the control signal is at a high level, the drain electrode and the source electrode of the first field effect transistor Q1 are conducted, the relay switch JK1 is provided with current to pass through, and the normally open switch of the relay switch JK1 is controlled to be closed, so that a loop of an external circuit connected with the output port JP1 is conducted.
When the passive control circuit 11 works, the external circuit connected with the output terminal JP1 may be an ac loop or a dc loop, and when the external circuit selects the ac loop, the sixth connection terminal and the seventh connection terminal may be connected with an ac input end, and the ac input end may be 220v ac voltage. In order to meet the safety creepage distance of 220V ac voltage, the second and third input assemblies JP3 and JP4 need to select a single row of pins of 1x2 of 5.08 mm.
If the control circuit does not need to be externally connected with an ac input terminal, the second input component JP3 and the third input component JP4 may be dial switches.
The control circuit capable of switching between passive output and active output can select an output port as an active output port, namely a wet joint, or can select an output port as a passive output port, namely a dry joint. The output port has two output modes, thereby bringing convenience to the production and manufacture of equipment and the field engineering installation of clients, and having flexible operation and high cost performance of the equipment.
The foregoing is merely a preferred embodiment of the present utility model, but the inventive design concept is not limited thereto, and many other equivalent embodiments can be included without departing from the scope of the utility model, as will be apparent to those skilled in the art.
Claims (10)
1. A control circuit capable of switching between passive output and active output, characterized in that:
the control circuit comprises an active control circuit and a passive control circuit, wherein a direct current input end outputs an electric signal to the active control circuit and the passive control circuit;
the first input assembly comprises a first connecting terminal, a second connecting terminal and an input terminal, wherein the input terminal receives an external control signal, the first connecting terminal is connected with the active control circuit, and the second connecting terminal is connected with the passive control circuit;
the passive control circuit comprises a relay switch and a first field effect tube, the direct current input end is connected with a first end of a coil of the relay switch, a second end of the coil of the relay switch is connected with the first field effect tube, the first field effect tube receives the control signal and controls the electrification of the coil of the relay switch by the control signal, a first normally open port of the relay switch is connected with a third connecting terminal, and a second normally open port of the relay switch is connected with a fourth connecting terminal;
the active control circuit comprises a second field effect transistor, a fifth connecting terminal, a sixth connecting terminal, a seventh connecting terminal and an eighth connecting terminal;
the direct current input end is connected with the fifth connecting terminal, the sixth connecting terminal is connected with the third connecting terminal, the fourth connecting terminal is connected with the seventh connecting terminal, the eighth connecting terminal is connected with the second field effect transistor, and the second field effect transistor receives the control signal and is controlled to be on-off by the control signal;
the third connecting terminal and the fourth connecting terminal are output ports.
2. The switchable passive output and active output control circuit of claim 1, wherein:
the second end of the coil of the relay switch is connected with the drain electrode of the first field effect tube, the grid electrode of the first field effect tube receives the signal of the second connecting terminal, and the source electrode of the first field effect tube is connected with the grounding end;
when the passive control circuit works, the input terminal is in short circuit with the second connecting terminal.
3. The switchable passive output and active output control circuit of claim 2, wherein:
the grid electrode of the first field effect tube is connected with the first end of the first resistor, and the second end of the first resistor is connected with the second connecting terminal.
4. A control circuit for switchable passive and active outputs as claimed in claim 3, wherein:
the second end of the first resistor is also connected with the first end of a third resistor, and the second end of the third resistor is connected with the grounding end.
5. The switchable passive output and active output control circuit of claim 1, wherein:
the grid electrode of the second field effect tube receives the signal output by the first connecting terminal, the drain electrode of the second field effect tube is connected to the eighth connecting terminal, and the source electrode of the second field effect tube is connected with the grounding end;
when the active control circuit works, the input terminal is in short circuit with the first connecting terminal.
6. The switchable passive output and active output control circuit of claim 5, wherein:
and the grid electrode of the second field effect transistor is connected with the first end of the second resistor, and the second end of the second resistor is connected with the first connecting terminal.
7. The switchable passive output and active output control circuit of claim 6, wherein:
the second end of the second resistor is also connected with the first end of a fourth resistor, and the second end of the fourth resistor is also connected with the grounding end.
8. A switchable passive output and active output control circuit according to any one of claims 1 to 7, wherein:
the fifth connection terminal and the sixth connection terminal are second input components;
the seventh connection terminal and the eighth connection terminal are third input components.
9. A switchable passive output and active output control circuit according to any one of claims 1 to 7, wherein:
the first end of the coil of the relay switch and the second end of the coil of the relay switch are also connected with diodes.
10. A switchable passive output and active output control circuit according to any one of claims 1 to 7, wherein:
and a first capacitor and a second capacitor which are connected in parallel are arranged between the direct current input end and the grounding end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320350719.2U CN219456753U (en) | 2023-02-27 | 2023-02-27 | Control circuit capable of switching passive output and active output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320350719.2U CN219456753U (en) | 2023-02-27 | 2023-02-27 | Control circuit capable of switching passive output and active output |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219456753U true CN219456753U (en) | 2023-08-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320350719.2U Active CN219456753U (en) | 2023-02-27 | 2023-02-27 | Control circuit capable of switching passive output and active output |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219456753U (en) |
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2023
- 2023-02-27 CN CN202320350719.2U patent/CN219456753U/en active Active
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