Isolation control circuit and multifunctional universal line switching module

Abstract

The utility model discloses an isolation control circuit and a multifunctional universal line switching module, the isolation control circuit comprises an output signal isolation control circuit and an input signal isolation control circuit, and the output signal isolation control circuit is used for isolating and outputting an output signal to a signal input / output interface; and the input signal isolation control circuit is used for performing isolation output on the input signal of the input / output interface. Thus, all input and output interfaces are isolated by using the optocouplers, the influence of external interference signals on input and output signals is filtered out to the greatest extent, and the bit error rate caused by the external interference signals in the signal transmission process can be greatly reduced. In addition, long-distance remote state monitoring or multi-device connection state monitoring can be carried out through devices such as a router or a switch and the like through a multifunctional universal line switching module composed of an input and output interface circuit, one or more isolation control circuits, a main control circuit and a network communication circuit, and the universality is better.

Description

Technical Field

[0001] The utility model relates to the technical field of wiring circuits, in particular to an isolation control circuit and a multifunctional universal line transfer module. Background Art

[0002] Isolation controllers are often used in real life. Its working principle is to isolate and control large current or high voltage signals by inputting small control signals, thereby increasing the safety of circuit control. Generally, an isolation controller inputs a small signal through a signal input terminal to control a large current or high voltage signal at the signal output terminal.

[0003] The existing terminal blocks of isolation controllers are generally single terminal blocks, which can only achieve single input or output isolation control, with relatively poor versatility. And usually there is no network connection interface, so remote network control cannot be realized, and the general performance is relatively poor. Summary of the Utility Model

[0004] The utility model aims to at least solve one of the technical problems in the related art to some extent. For this reason, an object of the utility model is to propose an isolation control circuit.

[0005] To achieve the above object, according to an embodiment of the utility model, the isolation control circuit includes:

[0006] An output signal isolation control circuit, which is used to isolate and output the output signal to a signal input / output interface;

[0007] An input signal isolation control circuit, which is used to isolate and output the input signal of the input / output interface.

[0008] Further, according to an embodiment of the utility model, the output signal isolation control circuit includes:

[0009] A first optocoupler U7, the anode of the light-emitting diode end of the first optocoupler U7 is connected to one end of the output signal, the cathode of the light-emitting diode end of the first optocoupler U7 is connected to the reference ground through a first resistor R33, and the collector of the photosensitive triode end of the first optocoupler U7 is connected to the output end of the first power supply;

[0010] A second optocoupler U10, the anode of the light-emitting diode end of the second optocoupler U10 is connected to the other end of the output signal, the cathode of the light-emitting diode end of the second optocoupler U10 is connected to the reference ground through a second resistor R38, and the collector of the photosensitive triode end of the first optocoupler U7 is connected to the output end of the first power supply;

[0011] The first triode Q3, the base of the first triode Q3 is connected to the emitter of the photosensitive triode terminal of the first optocoupler U7 through the third resistor R34, the base of the first triode Q3 is also connected to the reference ground through the fourth resistor R42, and the emitter of the first triode Q3 is connected to the reference ground;

[0012] The second triode Q2, the base of the second triode Q2 is connected to the collector of the first triode Q3 through the fifth resistor R31, the base of the second triode Q2 is also connected to the output terminal of the first power supply through the sixth resistor R30, the emitter of the second triode Q2 is connected to the output terminal of the first power supply, and the collector of the second triode Q2 is connected to the signal input / output interface;

[0013] The third triode Q4, the base of the third triode Q4 is connected to the emitter of the photosensitive triode terminal of the second optocoupler U10 through the seventh resistor R39, the base of the third triode Q4 is also connected to the reference ground through the eighth resistor R40, the emitter of the third triode Q4 is connected to the reference ground, and the collector of the third triode Q4 is connected to the signal input / output interface.

[0014] Further, according to an embodiment of the present invention, the input signal isolation control circuit includes:

[0015] The third optocoupler U8, the anode of the light-emitting diode terminal of the third optocoupler U8 is connected to the signal input / output interface through the ninth resistor R32, the cathode of the light-emitting diode terminal of the third optocoupler U8 is connected to the reference ground through the tenth resistor R29, the collector of the photosensitive triode terminal of the third optocoupler U8 is connected to the output terminal of the second power supply, the emitter of the photosensitive triode terminal of the third optocoupler U8 is connected to the reference ground through the eleventh resistor R36, and the emitter of the photosensitive triode terminal of the third optocoupler U8 outputs a first input signal;

[0016] The fourth optocoupler U9, the cathode of the light-emitting diode terminal of the fourth optocoupler U9 is connected to the signal input / output interface through the twelfth resistor R35, the anode of the light-emitting diode terminal of the fourth optocoupler U9 is connected to the output terminal of the first power supply through the thirteenth resistor R28, the collector of the photosensitive triode terminal of the fourth optocoupler U9 is connected to the output terminal of the second power supply, the emitter of the photosensitive triode terminal of the fourth optocoupler U9 is connected to the reference ground through the fourteenth resistor R37, and the emitter of the photosensitive triode terminal of the fourth optocoupler U9 outputs a second input signal.

[0017] Further, according to an embodiment of the present invention, the isolation control circuit further includes:

[0018] A signal indication circuit, which is connected to the signal input / output interface to indicate the signal of the signal input / output interface.

[0019] Further, according to an embodiment of the present invention, the signal indication circuit includes:

[0020] A first light-emitting diode D5, the anode of the first light-emitting diode D5 is connected to the reference ground through the tenth resistor R29, and the cathode of the first light-emitting diode D5 is connected to the signal input / output interface through the fifteenth resistor R43.

[0021] On the other hand, the present invention also provides a multifunctional general-purpose line transfer module, including:

[0022] An input / output interface circuit, the input / output interface circuit includes one or more input / output interfaces;

[0023] One or more of the isolation control circuits, where one of the input / output interfaces is connected to one of the input / output interfaces;

[0024] A main control circuit, the main control circuit is connected to the input / output interface circuit;

[0025] A network communication circuit, the network communication circuit is connected to the main control circuit.

[0026] Further, according to an embodiment of the present invention, the main control circuit includes:

[0027] A main controller;

[0028] A selection switch circuit, the selection switch circuit includes one or more control switches, one end of each switch is respectively connected to the output terminal of the second power supply through a current-limiting resistor, the other end of each switch is respectively connected to the reference ground, and the one end of each switch is also respectively connected to the control terminal of the main controller.

[0029] Further, according to an embodiment of the present invention, the network communication circuit includes:

[0030] A network controller, the network controller is connected to the main control circuit;

[0031] A network transformer, the network transformer is connected to the network controller;

[0032] A network interface, the network interface is connected to the network transformer.

[0033] Further, according to an embodiment of the present invention, the network communication circuit further includes a network indicator circuit, and the network indicator circuit includes:

[0034] The second light-emitting diode D1, the anode of the second light-emitting diode D1 is connected to the output terminal of the third power supply through the sixteenth resistor R1, and the cathode of the second light-emitting diode D1 is connected to the data transmission indication control terminal of the network controller;

[0035] The third light-emitting diode D2, the anode of the third light-emitting diode D2 is connected to the output terminal of the third power supply through the seventeenth resistor R2, and the cathode of the third light-emitting diode D2 is connected to the link state indication control terminal of the network controller.

[0036] Further, according to an embodiment of the present invention, the multi-functional general-purpose line transfer module further includes a power supply circuit, and the power supply circuit includes:

[0037] A power supply interface;

[0038] The first MOS transistor Q1, the drain of the first MOS transistor Q1 is connected to the power supply interface, the source of the first MOS transistor Q1 is connected to one end of the eighteenth resistor R4, the other end of the eighteenth resistor R4 is connected to the gate of the first MOS transistor Q1, the gate of the first MOS transistor Q1 is further connected to the reference ground through the nineteenth resistor R7, and the source of the first MOS transistor Q1 is further connected to the reference ground through the capacitor C1;

[0039] A voltage conversion circuit, the input end of the voltage conversion circuit is connected to the source of the first MOS transistor Q1, and the voltage conversion circuit is used to convert the input power supply to output one or more DC power supplies.

[0040] The isolation control circuit provided by the embodiment of the present invention uses the output signal isolation control circuit to isolate and output the output signal to the signal input / output interface; the input signal isolation control circuit is used to isolate and output the input signal of the input / output interface. In this way, all input / output interfaces use optocouplers for isolation, filtering out the influence of external interference signals on the input / output signals to the greatest extent, and greatly reducing the error rate caused by external interference signals during signal transmission. In addition, the multi-functional general-purpose line transfer module composed of the input / output interface circuit, one or more of the above isolation control circuits, the main control circuit, and the network communication circuit communicates using the network communication protocol (TCP / IP), and can perform long-distance remote status monitoring or multi-device connection status monitoring through devices such as routers or switches, with better versatility. Description of the Drawings

[0041] Figure 1 It is a schematic structural diagram of the isolation control circuit provided by the present invention;

[0042] Figure 2Provide the structural block diagram of the multi-functional general circuit transfer module for the present utility model;

[0043] Figure 3 Provide the schematic diagram of the input and output interface circuit for the present utility model;

[0044] Figure 4 Provide the schematic diagram of the main control circuit for the present utility model;

[0045] Figure 5 Provide the schematic diagram of the network communication circuit for the present utility model;

[0046] Figure 6 Provide the schematic diagram of the power supply circuit for the present utility model;

[0047] Figure 7 Provide the schematic diagram of the multi-functional general circuit transfer device for the present utility model.

[0048] The realization of the purpose, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings in combination with the embodiments.

[0049] Reference numerals

[0050] Main housing 10;

[0051] Upper cover 101;

[0052] Input and output interface 102;

[0053] Network interface 103;

[0054] Power supply interface 104;

[0055] Bottom plate 20;

[0056] Circuit board 30;

[0057] Dip switch 301. Detailed implementation manners

[0058] In order to enable those skilled in the art of this technology to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the specification of the present utility model herein are only for the purpose of describing specific embodiments, and are not intended to limit the present utility model.

[0059] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of the present invention. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive of other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0060] Referring to Figure 1 , on the one hand, an embodiment of the present invention provides an isolation control circuit, including: an output signal isolation control circuit and an input signal isolation control circuit. The output signal isolation control circuit is configured to isolate and output an output signal to a signal input / output interface; specifically, as Figure 1 shown in, the signal input terminals of the output signal isolation control circuit are respectively connected to the output signal of the controller through the OUTH signal terminal and the OUTL signal terminal; wherein, the signals of the OUTH signal terminal and the OUTL signal terminal can be differential signals, and after being isolated by the output signal isolation control circuit, the isolated output signal is externally output through the IO signal terminal of the signal input / output interface.

[0061] The input signal isolation control circuit is configured to isolate and output the input signal of the input / output interface. Specifically, as Figure 1 shown in, the signal input / output interface receives an input signal, and after being isolated by the input signal isolation control circuit, it is externally output to the controller through the INH and INL signal terminals, wherein the signals of the INH signal terminal and the INL signal terminal can be differential signals. In this way, the input signal of the IO signal terminal of the signal input / output interface can be isolated and output to the signal receiving end of the controller. Thus, signal isolation input / output control can be achieved.

[0062] As Figure 1As shown in the figure, the output signal isolation control circuit includes: a first optocoupler U7, a second optocoupler U10, a first triode Q3, a second triode Q2, and a third triode Q4. The anode of the light-emitting diode terminal of the first optocoupler U7 is connected to one end of the output signal. The cathode of the light-emitting diode terminal of the first optocoupler U7 is connected to the reference ground through a first resistor R33. The collector of the photosensitive triode terminal of the first optocoupler U7 is connected to the output terminal of the first power supply. The anode of the light-emitting diode terminal of the second optocoupler U10 is connected to the other end of the output signal. The cathode of the light-emitting diode terminal of the second optocoupler U10 is connected to the reference ground through a second resistor R38. The collector of the photosensitive triode terminal of the first optocoupler U7 is connected to the output terminal of the first power supply. The base of the first triode Q3 is connected to the emitter of the photosensitive triode terminal of the first optocoupler U7 through a third resistor R34. The base of the first triode Q3 is also connected to the reference ground through a fourth resistor R42. The emitter of the first triode Q3 is connected to the reference ground. The base of the second triode Q2 is connected to the collector of the first triode Q3 through a fifth resistor R31. The base of the second triode Q2 is also connected to the output terminal of the first power supply through a sixth resistor R30. The emitter of the second triode Q2 is connected to the output terminal of the first power supply. The collector of the second triode Q2 is connected to the signal input / output interface. The base of the third triode Q4 is connected to the emitter of the photosensitive triode terminal of the second optocoupler U10 through a seventh resistor R39. The base of the third triode Q4 is also connected to the reference ground through an eighth resistor R40. The emitter of the third triode Q4 is connected to the reference ground. The collector of the third triode Q4 is connected to the signal input / output interface.

[0063] Specifically, the working process of the output signal isolation control circuit is as follows. When the controller outputs a high-level signal at the OUTH signal terminal and a low-level signal at the OUTL, it can make the photosensitive triode terminal of the first optocoupler U7 conduct, and then output a high-level signal to the base of the first triode Q3, so that the first triode Q3 also conducts, and then pull down the base of the second triode Q2 to a low-level signal, so that the second triode Q2 also conducts, and the second optocoupler U10 and the third triode Q4 are cut off due to the low level; then output a high level from the IO signal terminal. On the contrary, when the controller outputs a low-level signal at the OUTH signal terminal and a high-level signal at the OUTL, the third triode Q4 conducts and the second triode Q2 is cut off, so that a low level is output from the IO signal terminal. In this way, the isolation output of the controller output signal is realized.

[0064] As Figure 1As shown in the figure, the input signal isolation control circuit includes: a third optocoupler U8 and a fourth optocoupler U9. The anode of the light-emitting diode terminal of the third optocoupler U8 is connected to the signal input / output interface through the ninth resistor R32. The cathode of the light-emitting diode terminal of the third optocoupler U8 is connected to the reference ground through the tenth resistor R29. The collector of the phototransistor terminal of the third optocoupler U8 is connected to the second power supply output terminal. The emitter of the phototransistor terminal of the third optocoupler U8 is connected to the reference ground through the eleventh resistor R36. The emitter of the phototransistor terminal of the third optocoupler U8 outputs a first input signal. The cathode of the light-emitting diode terminal of the fourth optocoupler U9 is connected to the signal input / output interface through the twelfth resistor R35. The anode of the light-emitting diode terminal of the fourth optocoupler U9 is connected to the first power supply output terminal through the thirteenth resistor R28. The collector of the phototransistor terminal of the fourth optocoupler U9 is connected to the second power supply output terminal. The emitter of the phototransistor terminal of the fourth optocoupler U9 is connected to the reference ground through the fourteenth resistor R37. The emitter of the phototransistor terminal of the fourth optocoupler U9 outputs a second input signal.

[0065] Specifically, the working process of the input signal isolation control circuit is as follows. When an external signal is input through the IO port, when the input signal is a high-level signal, it can make the third optocoupler U8 conduct and the fourth optocoupler U9 cut off. In this way, a high level can be output through the INH terminal, and a low level can be output to the input terminal of the controller through the INL terminal, thus realizing the isolation input of the signal introduced by the signal input / output interface IO to the controller.

[0066] Refer to Figure 1 , the isolation control circuit further includes: a signal indication circuit, and the signal indication circuit is connected to the signal input / output interface to indicate the signal of the signal input / output interface. As Figure 1 shown in the figure, the signal indication circuit includes: a first light-emitting diode D5. The anode of the first light-emitting diode D5 is connected to the reference ground through the tenth resistor R29. The cathode of the first light-emitting diode D5 is connected to the signal input / output interface through the fifteenth resistor R43. When the circuit works, high and low level signals will appear at the input terminals of the third optocoupler U8 and the fourth optocoupler U9. These high and low level signals can pass through the anode terminal of the diode D5, so that the diode D5 can be controlled to be lit or extinguished, thus indicating the working state of the circuit. All input / output interfaces of the module use optocouplers for isolation, filtering out the influence of external interference signals on the input / output signals to the greatest extent, and greatly reducing the error rate caused by external interference signals during signal transmission. At the same time, each interface is equipped with an LED status light, which can intuitively display the input / output status of each interface.

[0067] Refer toFigure 2 and Figure 3 On the other hand, an embodiment of the present utility model further provides a multifunctional general-purpose line transfer module, which includes: an input / output interface circuit, one or more of the above isolation control circuits, a main control circuit, and a network communication circuit; the input / output interface circuit includes one or more input / output interfaces; one of the input / output interfaces is connected to one of the input / output interfaces; the main control circuit is connected to the input / output interface circuit; the network communication circuit is connected to the main control circuit. As Figure 3 shown, the input / output interface circuit may include a plurality of input / output interfaces, such as IO0 to IO15 in the figure. Each input / output interface can be respectively connected to the main control circuit through an isolation control circuit. In this way, the main control circuit can perform isolated input / output of signals with the input / output interface through the isolation control circuit. Realize isolated input / output control of multiple signals. Make the circuit more versatile. The network communication circuit can be connected through network settings, so that network connection can be realized and network control can be achieved. In application, remote input / output control can be realized.

[0068] Referring to Figure 4 , the main control circuit includes: a main controller and a selection switch circuit. The selection switch circuit includes one or more control switches. One end of each switch is respectively connected to the output end of the second power supply through current-limiting resistors R23, R25, R26, and R27, and the other end of each switch is respectively connected to the reference ground. One end of each switch is also respectively connected to the control end of the main controller U5. As Figure 4 shown, a plurality of control switches can be provided, such as Figure 4 in, switches SW1 to SW4. Different control signals can be sent to the main controller through different switches. In this way, different signal channels can be selected for signal transmission.

[0069] Referring to Figure 4 and Figure 5 , the network communication circuit includes: a network controller, a network transformer, and a network interface. The network controller is connected to the main control circuit; the network transformer is connected to the network controller; the network interface is connected to the network transformer. As Figure 5 shown, the network controller U4 is communicatively connected to the main controller U5 through a communication interface to realize data interaction. The network controller U4 is also connected to the network transformer U6 through a data transceiver interface to perform voltage transformation input / output of data through the network transformer U6. Then, the network device can be connected through the network interface J2, and connected to the Internet through the network device. In this way, the working state of the main controller U5 can be controlled through the client of the Internet.

[0070] AsFigure 5 As shown, the network communication circuit further includes a network indicator circuit, and the network indicator circuit includes: a second light-emitting diode D1 and a third light-emitting diode D2. The anode of the second light-emitting diode D1 is connected to the output terminal of the third power supply through a sixteenth resistor R1, and the cathode of the second light-emitting diode D1 is connected to the data transmission indication control terminal of the network controller; the anode of the third light-emitting diode D2 is connected to the output terminal of the third power supply through a seventeenth resistor R2, and the cathode of the third light-emitting diode D2 is connected to the link state indication control terminal of the network controller. The network controller U4 controls the lighting and extinguishing of the second light-emitting diode D1 and the third light-emitting diode D2 through the ACTLED and LINKLED signal terminals, so as to realize data transmission indication and link indication. This module uses the TCP / IP communication protocol and can perform long-distance remote status monitoring or multi-device connection status monitoring through devices such as routers or switches. Up to 16 channels of input and output can be controlled through a 4-bit DIP switch, and the input and output interfaces use pressure spring terminals, which are convenient and fast for wiring.

[0071] Referring to Figure 1 and Figure 6 As shown, the multi-functional general-purpose line transfer module further includes a power supply circuit, and the power supply circuit includes: a power supply interface, a first MOS transistor Q1, and a voltage conversion circuit. The drain of the first MOS transistor Q1 is connected to the power supply interface, the source of the first MOS transistor Q1 is connected to one end of an eighteenth resistor R4, the other end of the eighteenth resistor R4 is connected to the gate of the first MOS transistor Q1, the gate of the first MOS transistor Q1 is also connected to the reference ground through a nineteenth resistor R7, and the source of the first MOS transistor Q1 is also connected to the reference ground through a capacitor C1; the input end of the voltage conversion circuit is connected to the source of the first MOS transistor Q1, and the voltage conversion circuit is used to convert the input power supply to convert it into one or more DC power supply outputs. As Figure 6 As shown, when the DC input power supply VCC is correctly connected, the first MOS transistor Q1 is turned on and outputs direct current to the voltage conversion circuit. When the DC input power supply VCC is reversely connected, the first MOS transistor Q1 cannot be turned on. Thus, reverse connection prevention control can be realized. The voltage conversion circuit may include a voltage and conversion controller U2, a voltage converter U1, and a conversion controller U3, and multiple voltage converters can be used to realize the conversion output of multiple voltages.

[0072] As Figure 7As shown in [figure], the utility model embodiment also provides a multi-functional general circuit transfer device, which includes a circuit board. Through the circuit board, the isolation control circuit and the above-mentioned multi-functional general circuit transfer module can be realized. The circuit board is encapsulated in a housing composed of a bottom plate and a main housing. The input / output interface can be led out externally through elastic connection terminals, and the power interface and network interface can also be led out through corresponding interfaces. The control switch can adopt a control switch, and a flip-up cover is provided at the DIP switch, so that it is convenient for users to set the working state through the DIP switch.

[0073] The above is only an embodiment of the present utility model, but it does not limit the patent scope of the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing specific embodiments, or perform equivalent replacements on some of the technical features. Any equivalent structure made by using the content of the specification and drawings of the present utility model, directly or indirectly applied in other related technical fields, is similarly within the scope of the patent protection of the present utility model.

[0074] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0075] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, replacements, and variations to the above embodiments within the scope of the present utility model without departing from the principles and purposes of the present utility model, and all are within the scope of protection of the present utility model.

Claims

1. An isolation control circuit, characterized in that, Including: An output signal isolation control circuit, which is used to isolate and output the output signal to a signal input / output interface; An input signal isolation control circuit, which is used to isolate and output the input signal of the input / output interface; The input signal isolation control circuit includes: A third optocoupler (U8), the anode of the light-emitting diode terminal of the third optocoupler (U8) is connected to the signal input / output interface through a ninth resistor (R32), the cathode of the light-emitting diode terminal of the third optocoupler (U8) is connected to the reference ground through a tenth resistor (R29), the collector of the photosensitive triode terminal of the third optocoupler (U8) is connected to the output terminal of the second power supply, the emitter of the photosensitive triode terminal of the third optocoupler (U8) is connected to the reference ground through an eleventh resistor (R36), and the emitter of the photosensitive triode terminal of the third optocoupler (U8) outputs a first input signal; A fourth optocoupler (U9), the cathode of the light-emitting diode terminal of the fourth optocoupler (U9) is connected to the signal input / output interface through a twelfth resistor (R35), the anode of the light-emitting diode terminal of the fourth optocoupler (U9) is connected to the output terminal of the first power supply through a thirteenth resistor (R28), the collector of the photosensitive triode terminal of the fourth optocoupler (U9) is connected to the output terminal of the second power supply, the emitter of the photosensitive triode terminal of the fourth optocoupler (U9) is connected to the reference ground through a fourteenth resistor (R37), and the emitter of the photosensitive triode terminal of the fourth optocoupler (U9) outputs a second input signal; It also includes: A signal indication circuit, which is connected to the signal input / output interface to indicate the signal of the signal input / output interface; The signal indication circuit includes: A first light-emitting diode (D5), the anode of the first light-emitting diode (D5) is connected to the reference ground through the tenth resistor (R29), and the cathode of the first light-emitting diode (D5) is connected to the signal input / output interface through a fifteenth resistor (R43).

2. The isolation control circuit according to claim 1, wherein The output signal isolation control circuit includes: A first optocoupler (U7), the anode of the light-emitting diode terminal of the first optocoupler (U7) is connected to one end of the output signal, the cathode of the light-emitting diode terminal of the first optocoupler (U7) is connected to the reference ground through a first resistor (R33), and the collector of the photosensitive triode terminal of the first optocoupler (U7) is connected to the output terminal of the first power supply; A second optocoupler (U10), the anode of the light-emitting diode terminal of the second optocoupler (U10) is connected to the other end of the output signal, the cathode of the light-emitting diode terminal of the second optocoupler (U10) is connected to the reference ground through a second resistor (R38), and the collector of the photosensitive triode terminal of the first optocoupler (U7) is connected to the output terminal of the first power supply; The first triode (Q3), the base of the first triode (Q3) is connected to the emitter of the photosensitive triode terminal of the first optocoupler (U7) through the third resistor (R34), the base of the first triode (Q3) is also connected to the reference ground through the fourth resistor (R42), and the emitter of the first triode (Q3) is connected to the reference ground; The second triode (Q2), the base of the second triode (Q2) is connected to the collector of the first triode (Q3) through the fifth resistor (R31), the base of the second triode (Q2) is also connected to the output terminal of the first power supply through the sixth resistor (R30), the emitter of the second triode (Q2) is connected to the output terminal of the first power supply, and the collector of the second triode (Q2) is connected to the signal input / output interface; The third triode (Q4), the base of the third triode (Q4) is connected to the emitter of the photosensitive triode terminal of the second optocoupler (U10) through the seventh resistor (R39), the base of the third triode (Q4) is also connected to the reference ground through the eighth resistor (R40), the emitter of the third triode (Q4) is connected to the reference ground, and the collector of the third triode (Q4) is connected to the signal input / output interface.

3. A multifunctional general-purpose line transfer module, characterized in that, Comprising: An input / output interface circuit, the input / output interface circuit includes one or more input / output interfaces; One or more isolation control circuits according to any one of claims 1 to 2, wherein one of the input / output interfaces is connected to one of the input / output interfaces; A main control circuit, the main control circuit is connected to the input / output interface circuit; A network communication circuit, the network communication circuit is connected to the main control circuit.

4. The multifunctional general-purpose line transfer module according to claim 3, characterized in that, The main control circuit includes: A main controller; A selection switch circuit, the selection switch circuit includes one or more control switches, one end of each switch is respectively connected to the output terminal of the second power supply through a current limiting resistor, the other end of each switch is respectively connected to the reference ground, and the one end of each switch is also respectively connected to the control terminal of the main controller.

5. The multi-functional general circuit transfer module according to claim 3, characterized in that The network communication circuit includes: A network controller, the network controller is connected to the main control circuit; A network transformer, the network transformer is connected to the network controller; A network interface, the network interface is connected to the network transformer.

6. The multifunctional general-purpose line transfer module according to claim 5, characterized in that The network communication circuit further includes a network indicator circuit, and the network indicator circuit includes: The second light-emitting diode (D1), the anode of the second light-emitting diode (D1) is connected to the output terminal of the third power supply through the sixteenth resistor (R1), and the cathode of the second light-emitting diode (D1) is connected to the data transmission indication control terminal of the network controller; The third light-emitting diode (D2), the anode of the third light-emitting diode (D2) is connected to the output terminal of the third power supply through the seventeenth resistor (R2), and the cathode of the third light-emitting diode (D2) is connected to the link status indication control terminal of the network controller.

7. The multi-functional general circuit transfer module according to any one of claims 3 to 6, characterized in that Further includes a power supply circuit, and the power supply circuit includes: A power supply interface; The first MOS transistor (Q1), the drain of the first MOS transistor (Q1) is connected to the power supply interface, the source of the first MOS transistor (Q1) is connected to one end of the eighteenth resistor (R4), the other end of the eighteenth resistor (R4) is connected to the gate of the first MOS transistor (Q1), the gate of the first MOS transistor (Q1) is also connected to the reference ground through the nineteenth resistor (R7), and the source of the first MOS transistor (Q1) is also connected to the reference ground through the capacitor (C1); A voltage conversion circuit, the input end of the voltage conversion circuit is connected to the source of the first MOS transistor (Q1), and the voltage conversion circuit is used for converting the input power supply to output one or more DC power supply outputs.

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