Remote IO control module

Abstract

The utility model discloses a remote IO control module, which comprises an MCU, a network port to TTL circuit, a USB to TTL circuit, an isolation circuit, a driving circuit, an input interface electrically connected with the isolation circuit, an output interface electrically connected with the driving circuit, and a power supply circuit used for supplying power to the MCU, the network port to TTL circuit, the USB to TTL circuit, the isolation circuit and the driving circuit, and the alternative switching circuit is electrically connected with the MCU, the network port to TTL circuit and the USB to TTL circuit respectively. According to the utility model, the circuit integration level is high, and one control module can realize 100 IO ports.

Description

TECHNICAL FIELD

[0001] The utility model relates to IO technical field especially relates to a remote IO control module. BACKGROUND

[0002] The IO controller on the market is generally separated, including computer control card, interface terminal, cable etc., which is inconvenient to use.

[0003] Therefore, the prior art has defects and needs to be improved. INVENTION CONTENTS

[0004] The utility model solves the technical problem that provides a remote IO control module, realizes integration, spares the trouble of installing each component, can be used without computer, and is convenient to apply.

[0005] The technical scheme of the utility model is as follows: provide a remote IO control module, include: MCU, the network port conversion TTL circuit, USB conversion TTL circuit, isolation circuit, drive circuit that are connected with MCU electricity respectively, with the input interface that isolation circuit electricity is connected, with the output interface that drive circuit electricity is connected, for the power supply circuit that gives MCU, network port conversion TTL circuit, USB conversion TTL circuit, isolation circuit, drive circuit power supply, with MCU, network port conversion TTL circuit, USB conversion TTL circuit electricity respectively with the two choose all switch circuit of the connection.

[0006] Further, the power supply circuit includes: a power supply interface, a first voltage stabilizing circuit electrically connected to the power supply interface, a second voltage stabilizing circuit, a third voltage stabilifying circuit and a fourth voltage stabilizing circuit connected to the first voltage stabilizing circuit respectively.

[0007] Further, the MCU uses an STM32F407 series industrial chip with a main frequency of 168MHz and 80 IOs. It has the characteristics of fast response speed and good stability.

[0008] Further, the network port conversion TTL circuit includes: a network port and a CH9121 chip electrically connected to the network port.

[0009] Further, the USB conversion TTL circuit includes: a USB interface and a CH340 chip electrically connected to the USB interface.

[0010] Further, the isolation circuit uses a PS2805 chip with one-to-four optical couplings, and the input end of the PS2805 chip with one-to-four optical couplings is connected in series with an indicator LED.

[0011] Further, the drive circuit uses an ULN2803 chip with 8 channels, and the ULN2803 chip with 8 channels is connected in series with a command LED.

[0012] With the above scheme, the utility model provides a kind of remote IO control module, with the following technical effects:

[0013] 1, high circuit integration, 1 control module can realize 100 IO ports.

[0014] 2, communication mode adopts network port plus USB port compatible design, and both are switched by toggle switch, respectively realize TCP / IP or USB to TTL communication.

[0015] 3. Small space occupation, with expansion function. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the function module diagram of the utility model;

[0017] Figure 2 It is the circuit connection diagram of MCU;

[0018] Figure 3 It is the circuit principle diagram of network port to TTL circuit;

[0019] Figure 4 It is the circuit principle diagram of USB to TTL circuit;

[0020] Figure 5 It is the circuit principle diagram of isolation circuit;

[0021] Figure 6 It is the circuit principle diagram of input interface;

[0022] Figure 7 It is the circuit principle diagram of drive circuit;

[0023] Figure 8 It is the circuit principle diagram of output interface;

[0024] Figure 9 It is the circuit principle diagram of two alternative switching circuit;

[0025] Figure 10 It is the circuit principle diagram of power supply circuit. DETAILED DESCRIPTION

[0026] The utility model is specifically explained in detail as follows in connection with the drawings and specific embodiment.

[0027] Please refer to Figures 1-10The embodiment provides a remote IO control module, which comprises an MCU 10, a network port to TTL circuit 11 (LAN to TTL) and a USB to TTL circuit 12 (USB to TTL) electrically connected with the MCU 10 respectively, an isolation circuit 13, a driving circuit 14, an input interface 15 electrically connected with the isolation circuit 13, an output interface 16 electrically connected with the driving circuit 14, a power supply circuit for supplying power for the MCU 10, the network port to TTL circuit 11, the USB to TTL circuit 12, the isolation circuit 13 and the driving circuit 14, and a two-out-of-three switch circuit electrically connected with the MCU 10, the network port to TTL circuit 11 and the USB to TTL circuit 12 respectively. The MCU 10 is used for controlling the modules, the network port to TTL circuit 11 is used for converting the signal of a network cable into a TTL signal, the USB to TTL circuit 12 is used for converting the signal of a USB into a TTL signal, the input interface 15 is used for inputting a signal, the isolation circuit 13 is used for isolating the input signal to avoid the direct input signal from directly impacting the MCU 10, and the driving circuit 14 is used for converting the instruction output by the MCU 10 into a driving signal and outputting the driving signal through the output interface 16. The TX and RX lines controlled by the network port or the USB are switched through the two-out-of-three switch circuit.

[0028] In the embodiment, the power supply circuit comprises a power supply interface 17, a first voltage stabilizing circuit 18 electrically connected with the power supply interface 17, a second voltage stabilizing circuit 19, a third voltage stabilizing circuit 20 and a fourth voltage stabilizing circuit 21 connected with the first voltage stabilizing circuit 18 respectively.

[0029] In the embodiment, the MCU 10 adopts an STM32F407 series industrial chip with a main frequency of 168MHz and 80 IOs, and has the characteristics of fast response speed and good stability.

[0030] In the embodiment, the network port to TTL circuit 11 comprises a network port 22 and a CH9121 chip 23 electrically connected with the network port 22. The CH9121 chip can be set as a server end or a client end, and can set IP and port parameters, and can set the baud rate of a TTL end and other serial port parameters. The product is set as a server by default, and the baud rate is uniformly 115200.

[0031] In the embodiment, the USB to TTL circuit 12 comprises a USB interface 24 and a CH340 chip 25 electrically connected with the USB interface 24.

[0032] In the embodiment, the isolation circuit 13 adopts a one-to-four optical coupler PS2805 chip, the input end of the one-to-four optical coupler PS2805 chip 26 is connected with an indicating LED 27 in series, the input end is connected with a 24V indicating LED in series, and the LED is lighted when the port is effective. The output is connected with an IO of the MCU 10 through a pull-up resistor, and the MCU 10 determines whether the sensor signal exists by judging the high and low levels of the port.

[0033] In the embodiment, the driving circuit 14 adopts an 8-way ULN2803 chip, and the 8-way ULN2803 chip 28 is connected with a command LED 29 in series. The driving capability of the driving circuit 14 can reach 500mA, and the driving circuit 14 can meet the working of most electromagnetic valves and relays. The driving circuit 14 is also connected with a command LED in series as a command lamp, and the effective output LED is lighted, so that the state is observed conveniently.

[0034] In summary, the remote IO control module has the following technical effects:

[0035] 1. High circuit integration, one control module can realize 100 IO ports.

[0036] 2. The communication mode adopts network port and USB port compatible design, and the two are switched through a toggle switch, and TCP / IP or USB to TTL communication is realized.

[0037] 3. Small space occupation, with expansion function.

[0038] The above is only a preferred embodiment of the utility model, and is not used for limiting the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A remote IO control module, characterized by, The application relates to an MCU, a network port to TTL circuit, a USB to TTL circuit, an isolation circuit, a driving circuit, an input interface, an output interface, a power supply circuit and a two-select-one switch circuit. The power supply circuit comprises a power supply interface, a first voltage stabilizing circuit, a second voltage stabilizing circuit, a third voltage stabilizing circuit and a fourth voltage stabilizing circuit.

2. The remote IO control module of claim 1, wherein, The MCU adopts an STM32F407 series industrial-grade chip with a main frequency of 168 MHz and 80 IOs.

3. The remote IO control module of claim 1, wherein, The network port to TTL circuit comprises a network port and a CH9121 chip.

4. The remote IO control module of claim 1, wherein, The USB to TTL circuit comprises a USB interface and a CH340 chip.

5. The remote IO control module of claim 1, wherein, The isolation circuit adopts a PS2805 chip with one-to-four optical coupling, and an input end of the PS2805 chip with one-to-four optical coupling is connected with an indicating LED in series.

6. The remote IO control module of claim 1, wherein, The driving circuit adopts an ULN2803 chip with 8 paths, and the ULN2803 chip with 8 paths is connected with a command LED in series.

7. The remote IO control module of claim 1, wherein, ​

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