An integrated connection system for USB and ETherCAT sub-devices

Abstract

The present invention relates to the field of electronic device connection technology, and in particular to an integrated connection system for USB and EtherCAT sub-devices, which includes a power supply circuit for receiving an external 24V power supply and converting it into a required voltage output; a backplane connector module, the backplane connector module includes multiple connectors, and the multiple connectors are sequentially connected to the front and rear stage signals; a USB hub module includes a first USB hub U3 and a second USB hub U4; an EtherCAT chain topology module, the EtherCAT chain topology module includes a network cable interface RJ45 and multiple analog switches, which are used to realize the chain connection of EtherCAT slave stations. The present invention has a novel structure, and by integrating USB, EtherCAT connection and power management functions, it significantly reduces the complexity and wiring difficulty of multi-device connection and power supply, and improves the reliability and flexibility of the connection.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic equipment connection, and in particular to an integrated connection system for USB and ETherCAT sub-devices. Background Art

[0002] In existing technologies, the connection between computers and various devices faces many challenges. The USB2.0 hub has too many USB cables and limited power supply, which limits its expansion capability and power supply efficiency. At the same time, EtherCAT slave devices require independent network cables and power cables, which not only increases the complexity of connection, but also increases the difficulty of wiring in a limited space. As the number of devices increases, the confusion and difficulty of cable management have become a problem that needs to be solved. Therefore, the market urgently needs an innovative solution to simplify connections, reduce the number of cables and improve power supply efficiency. Summary of the invention

[0003] In view of the problems of the prior art, the present invention provides an integrated connection system for USB and EtherCAT sub-devices, which has a novel structure and significantly reduces the complexity and wiring difficulty of connecting and powering multiple devices, and improves the reliability and flexibility of the connection by integrating USB, EtherCAT connection and power management functions.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The present invention provides an integrated connection system for USB and EtherCAT sub-devices, comprising: a power supply circuit for receiving an external 24V power supply and converting it into a required voltage output; a bottom plate connector module, wherein the bottom plate connector module comprises a plurality of connectors, and the plurality of connectors are sequentially connected with front-end and rear-end signals; a USB hub module, wherein the USB hub module comprises a first USB hub U3 and a second USB hub U4, wherein the first USB hub U3 is connected with the second USB hub U4, and the first USB hub U3 and the second USB hub U4 are respectively connected with a plurality of devices through the bottom plate connector module; an EtherCAT chain topology module, wherein the EtherCAT chain topology module comprises a network cable interface RJ45 and a plurality of analog switches, and is used to realize the chain connection of EtherCAT slave stations; wherein the power supply circuit, the bottom plate connector module, the USB hub module and the EtherCAT chain topology module are integrated on the same board level to form an integrated device connection device; and the power supply module is used to supply power to the power supply circuit, the bottom plate connector module, the USB hub module and the EtherCAT chain topology module.

[0006] The plurality of connectors include connector CN1, connector CN2, connector CN3, connector CN4, connector CN5, connector CN6 and connector CN7, and the connector CN1, connector CN2, connector CN3, connector CN4, connector CN5, connector CN6 and connector CN7 are connected to front and rear stage signals in sequence;

[0007] The connector CN1, the connector CN2 and the connector CN3 are respectively connected to the first USB hub U3, and the second USB hub U4 is respectively connected to the connector CN4, the connector CN5, the connector CN6 and the connector CN7;

[0008] The multiple analog switches include analog switch U5, analog switch U6, analog switch U7, analog switch U8, analog switch U9 and analog switch U10. The network cable interface RJ45 is signal-connected to the connector CN1. The analog switch U5 is connected between the connector CN1 and the connector CN2. The analog switch U6 is connected between the connector CN2 and the connector CN3. The analog switch U7 is connected between the connector CN3 and the connector CN4. The analog switch U8 is connected between the connector CN4 and the connector CN5. The analog switch U9 is connected between the connector CN5 and the connector CN6. The analog switch U10 is connected between the connector CN6 and the connector CN7.

[0009] Wherein, the power supply circuit includes fuse F6, fuse F7, fuse F8, fuse F9, diode D1, BUCK buck chip U1, LDO chip U2, capacitor C1, capacitor C2, capacitor C3 and voltage regulator diode D2, fuse F6 is connected in parallel with fuse F7, the external 24V power input is connected to the cathode of diode D1 and the input end of BUCK buck chip U1 after passing through fuse F6 and fuse F7, the anode of diode D1 is grounded, the output end of BUCK buck chip U1 is connected to one end of capacitor C1 and the input end of LDO chip U2, and the other end of capacitor C1 is connected, fuse F8 is connected in parallel with fuse F9, the output end of LDO chip U2 is connected to one end of capacitor C2 and one end of fuse F9, the other end of capacitor C2 is grounded, the other end of fuse F9 is connected to one end of capacitor C3 and the cathode of voltage regulator diode D2, and the other end of capacitor C3 and the anode of voltage regulator diode D2 are grounded.

[0010] The model of the LDO chip U2 is AZ1117-3.3.

[0011] The USB hub module further includes a transient voltage suppressor diode TVS1, and an external 5V power supply supplies power to the first USB hub U3 and the second USB hub U4 via the transient voltage suppressor diode TVS1.

[0012] The first USB hub U3 is provided with a PSEFL pin, and the PSEFL pin of the first USB hub U3 is connected to a resistor R14, and the resistance value of the resistor R14 is 4.7KΩ.

[0013] The second USB hub U4 is provided with a PSEFL pin, the PSEFL pin of the second USB hub U3 is connected to a resistor R28, and the resistance value of the resistor R28 is 4.7KΩ.

[0014] The DP4 pin of the first USB hub U3 is connected to the DP0 pin of the second USB hub U4, and the DM4 pin of the first USB hub U3 is connected to the DM0 pin of the second USB hub U4;

[0015] The DP1 pin of the first USB hub U3 is connected to the A9 pin and the B9 pin of the connector CN1, and the DM1 pin of the first USB hub U3 is connected to the A8 pin and the B8 pin of the connector CN1;

[0016] The DP2 pin of the first USB hub U3 is connected to the A9 pin and the B9 pin of the connector CN2, and the DM2 pin of the first USB hub U3 is connected to the A8 pin and the B8 pin of the connector CN2;

[0017] The DP3 pin of the first USB hub U3 is connected to the A9 pin and the B9 pin of the connector CN3, and the DM3 pin of the first USB hub U3 is connected to the A8 pin and the B8 pin of the connector CN3;

[0018] The DP1 pin of the second USB hub U4 is connected to the A9 pin and the B9 pin of the connector CN4, and the DM1 pin of the second USB hub U4 is connected to the A8 pin and the B8 pin of the connector CN4;

[0019] The DP2 pin of the second USB hub U4 is connected to the A9 pin and the B9 pin of the connector CN5, and the DM2 pin of the second USB hub U4 is connected to the A8 pin and the B8 pin of the connector CN5;

[0020] The DP3 pin of the second USB hub U4 is connected to the A9 pin and the B9 pin of the connector CN6, and the DM3 pin of the second USB hub U4 is connected to the A8 pin and the B8 pin of the connector CN6;

[0021] The DP4 pin of the second USB hub U4 is connected to the A9 pin and the B9 pin of the connector CN7, and the DM4 pin of the second USB hub U4 is connected to the A8 pin and the B8 pin of the connector CN7.

[0022] Among them, the TD+ pin of the network cable interface RJ45 is connected to the B6 pin of the connector CN1 and the S3 pin of the analog switch U5, the TD- pin of the network cable interface RJ45 is connected to the B7 pin of the connector CN1 and the S4 pin of the analog switch U5, the RD+ pin of the network cable interface RJ45 is connected to the B14 pin of the connector CN1 and the S1 pin of the analog switch U5, and the RD- pin of the network cable interface RJ45 is connected to the B15 pin of the connector CN1 and the S2 pin of the analog switch U5.

[0023] Beneficial effects of the present invention:

[0024] The present invention has a novel structure and an ingenious design. The bottom plate connector module of the present invention comprises seven connectors (CN1 to CN7), which are connected with front-end and rear-end signals in sequence and are used to connect multiple devices; the USB hub module comprises a first USB hub U3 and a second USB hub U4, which are connected with multiple USB devices through the bottom plate connector module; the second USB hub U4 is cascade-connected through the downstream interface of the first USB hub U3, and together realizes the connection of up to 7 devices with the computer; the EtherCAT chain topology module comprises a network cable interface RJ45 and seven analog switches (U5 to U10), which are used to realize the chain connection of EtherCAT slave stations; the network cable interface RJ45 is connected with connectors CN1 to CN7 in sequence through the analog switch, and when the connector is inserted into the PCBA board, the analog switch disconnects the front-end and rear-end signals to realize the chain EtherCAT network topology; the present invention improves the convenience, reliability and flexibility of multi-device connection and power supply, reduces the wiring difficulty and maintenance cost, and brings significant innovation and improvement to the connection technology between computers and devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The present invention is a circuit diagram of a power supply circuit for an integrated connection system for USB and ETherCAT sub-devices.

[0026] Figure 2 The present invention is a circuit diagram of a backplane connector module for an integrated connection system for USB and ETherCAT sub-devices.

[0027] Figure 3 The present invention is a circuit diagram of a USB hub module for an integrated connection system of USB and ETherCAT sub-devices.

[0028] Figure 4 The present invention is a circuit diagram of an EtherCAT chain topology module for an integrated connection system of USB and EtherCAT sub-devices. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with the embodiments and drawings, and the contents mentioned in the embodiments are not intended to limit the present invention. The present invention is described in detail below in conjunction with the drawings.

[0030] like Figures 1 to 4 An integrated connection system for USB and EtherCAT sub-devices shown in the figure includes: a power supply circuit for receiving an external 24V power supply and converting it into a required voltage output; a bottom plate connector module, the bottom plate connector module includes a plurality of connectors, and the plurality of connectors are sequentially connected with front-end and rear-end signals; a USB hub module, the USB hub module includes a first USB hub U3 and a second USB hub U4, the first USB hub U3 is connected to the second USB hub U4, and the first USB hub U3 and the second USB hub U4 are respectively connected to a plurality of devices through the bottom plate connector module; an EtherCAT chain topology module, the EtherCAT chain topology module includes a network cable interface RJ45 and a plurality of analog switches, and is used to realize the chain connection of EtherCAT slave stations; wherein the power supply circuit, the bottom plate connector module, the USB hub module and the EtherCAT chain topology module are integrated on the same board level to form an integrated device connection device; the power supply module is used to supply power to the power supply circuit, the bottom plate connector module, the USB hub module and the EtherCAT chain topology module;

[0031] The baseboard connector module includes a connector CN1, a connector CN2, a connector CN3, a connector CN4, a connector CN5, a connector CN6 and a connector CN7, and the connectors CN1, CN2, CN3, CN4, CN5, CN6 and CN7 are connected to front and rear stage signals in sequence;

[0032] The USB hub module includes a first USB hub U3 and a second USB hub U4, the connector CN1, the connector CN2 and the connector CN3 are respectively connected to the first USB hub U3, the first USB hub U3 is connected to the second USB hub U4, and the second USB hub U4 is respectively connected to the connector CN4, the connector CN5, the connector CN6 and the connector CN7;

[0033] The EtherCAT chain topology module includes a network cable interface RJ45, an analog switch U5, an analog switch U6, an analog switch U7, an analog switch U8, an analog switch U9 and an analog switch U10. The network cable interface RJ45 is signal-connected to the connector CN1, the analog switch U5 is connected between the connector CN1 and the connector CN2, the analog switch U6 is connected between the connector CN2 and the connector CN3, the analog switch U7 is connected between the connector CN3 and the connector CN4, the analog switch U8 is connected between the connector CN4 and the connector CN5, the analog switch U9 is connected between the connector CN5 and the connector CN6, and the analog switch U10 is connected between the connector CN6 and the connector CN7.

[0034] Specifically, the embodiment of the present application has a novel structure and an ingenious design. The bottom plate connector module in the embodiment of the present application includes seven connectors (CN1 to CN7), and the connector adopts PCIex1 (PCIe-36p, straight plug). These connectors are connected to the front and rear stage signals in sequence and are used to connect multiple devices; the USB hub module includes a first USB hub U3 and a second USB hub U4, which are connected to multiple USB devices through the bottom plate connector module; the second USB hub U4 is cascaded through the downstream interface of the first USB hub U3, and together realizes the connection of up to 7 devices with the computer. Connection; EtherCAT chain topology module: includes network cable interface RJ45 and seven analog switches (U5 to U10), which are used to realize the chain connection of EtherCAT slave stations; the network cable interface RJ45 is connected to connectors CN1 to CN7 in sequence through the analog switch. When the connector is inserted into the PCBA board, the analog switch disconnects the front and rear stage signals to realize the chain EtherCAT network topology; the embodiment of the present application improves the convenience, reliability and flexibility of multi-device connection and power supply, reduces the wiring difficulty and maintenance cost, and brings significant innovation and improvement to the connection technology between computers and devices.

[0035] In the embodiment of the present application, the power supply circuit includes a fuse F6, a fuse F7, a fuse F8, a fuse F9, a diode D1, a BUCK buck chip U1, an LDO chip U2, a capacitor C1, a capacitor C2, a capacitor C3 and a voltage regulator diode D2. The fuse F6 is connected in parallel with the fuse F7. The external 24V power supply input is connected to the cathode of the diode D1 and the input end of the BUCK buck chip U1 after passing through the fuse F6 and the fuse F7. The anode of the diode D1 is grounded. The BUCK buck chip U1 The output end is connected to one end of the capacitor C1 and the input end of the LDO chip U2, the other end of the capacitor C1 is connected, the fuse F8 is connected in parallel with the fuse F9, the output end of the LDO chip U2 is connected to one end of the capacitor C2 and one end of the fuse F9, the other end of the capacitor C2 is grounded, the other end of the fuse F9 is connected to one end of the capacitor C3 and the cathode of the Zener diode D2, and the other end of the capacitor C3 and the anode of the Zener diode D2 are grounded; wherein the model of the LDO chip U2 is AZ1117-3.3. Specifically, after the external 24V power supply is input, it is protected against overcurrent by fuses F6 and F7, and protected against overvoltage by diode D1; then, the voltage is converted to 5V by the BUCK step-down chip U1, and then converted to 3.3V by the LDO chip U2 (AZ1117-3.3) to power the baseboard connector module, USB hub module and EtherCAT chain topology module; among them, the filtering and voltage stabilization circuit composed of capacitors C1, C2, C3 and Zener diode D2 ensures the stability of the voltage.

[0036] In the embodiment of the present application, the USB hub module further includes a transient voltage suppressor diode TVS1, and the external 5V power supply supplies power to the first USB hub U3 and the second USB hub U4 via the transient voltage suppressor diode TVS1. Specifically, the transient voltage suppressor diode TVS1 is used to protect the USB signal from voltage shock.

[0037] In the embodiment of the present application, the first USB hub U3 is provided with a PSEFL pin, and the PSEFL pin of the first USB hub U3 is connected to a resistor R14, and the resistance of the resistor R14 is 4.7KΩ; wherein, the second USB hub U4 is provided with a PSEFL pin, and the PSEFL pin of the second USB hub U3 is connected to a resistor R28, and the resistance of the resistor R28 is 4.7KΩ. Specifically, the PSEFL pin of the first USB hub U3 is pulled up to 3.3V through a 4.7KΩ resistor to achieve self-power supply; the second USB hub U4 is also provided with a PSEFL pin and a 4.7KΩ resistor, and is cascaded through the downstream interface of the first USB hub U3 to jointly achieve the connection of up to 7 USB devices with the computer.

[0038] In the embodiment of the present application, the DP4 pin of the first USB hub U3 is connected to the DP0 pin of the second USB hub U4, and the DM4 pin of the first USB hub U3 is connected to the DM0 pin of the second USB hub U4;

[0039] The DP1 pin of the first USB hub U3 is connected to the A9 pin and the B9 pin of the connector CN1, and the DM1 pin of the first USB hub U3 is connected to the A8 pin and the B8 pin of the connector CN1;

[0040] The DP2 pin of the first USB hub U3 is connected to the A9 pin and the B9 pin of the connector CN2, and the DM2 pin of the first USB hub U3 is connected to the A8 pin and the B8 pin of the connector CN2;

[0041] The DP3 pin of the first USB hub U3 is connected to the A9 pin and the B9 pin of the connector CN3, and the DM3 pin of the first USB hub U3 is connected to the A8 pin and the B8 pin of the connector CN3;

[0042] The DP1 pin of the second USB hub U4 is connected to the A9 pin and the B9 pin of the connector CN4, and the DM1 pin of the second USB hub U4 is connected to the A8 pin and the B8 pin of the connector CN4;

[0043] The DP2 pin of the second USB hub U4 is connected to the A9 pin and the B9 pin of the connector CN5, and the DM2 pin of the second USB hub U4 is connected to the A8 pin and the B8 pin of the connector CN5;

[0044] The DP3 pin of the second USB hub U4 is connected to the A9 pin and the B9 pin of the connector CN6, and the DM3 pin of the second USB hub U4 is connected to the A8 pin and the B8 pin of the connector CN6;

[0045] The DP4 pin of the second USB hub U4 is connected to the A9 pin and the B9 pin of the connector CN7, and the DM4 pin of the second USB hub U4 is connected to the A8 pin and the B8 pin of the connector CN7.

[0046] In an embodiment of the present application, the TD+ pin of the network cable interface RJ45 is connected to the B6 pin of the connector CN1 and the S3 pin of the analog switch U5, the TD- pin of the network cable interface RJ45 is connected to the B7 pin of the connector CN1 and the S4 pin of the analog switch U5, the RD+ pin of the network cable interface RJ45 is connected to the B14 pin of the connector CN1 and the S1 pin of the analog switch U5, and the RD- pin of the network cable interface RJ45 is connected to the B15 pin of the connector CN1 and the S2 pin of the analog switch U5.

[0047] Specifically, in the embodiment of the present application, 4) D+ / D- is the downstream signal of the USB hub, which is used to communicate with the PCBA on the PCIE (i.e., communication between the seven connectors CN1 to CN7 of the baseboard connector module); TX+ / TX- / RX+ / RX- is a set of transceiver signals of 10 / 100M Ethernet, which is used to realize the chain slave topology of EtherCAT; one Ethernet input, RJ45 is used as a network cable connection, and the analog switch is used as a bridge to connect to the seven connectors of the baseboard connector module. Working principle of the circuit: When the PCIE connector is not inserted into the PCBA board, the U5 to U10 analog switch enable is pulled up, and the 10 / 100M signal (TX+ / TX- / RX+ / RX-) of the network cable is connected to the 10 / 100M signal of the first PCIE connector in sequence, and the 10 / 100M signal of the first PCIE connector in sequence is connected to the 10 / 100M signal of the second PCIE connector in sequence. By analogy, the uninserted PCBA board will be connected to the 10 / 100M signals of the front and rear stages. At this time, all 10 / 100M signals are connected together; when the PCIE connector is inserted into the PCBA board, Pn_SEL# is grounded by the PCBA, and the analog switch is cut off. At this time, the 10 / 100M signals of the front and rear stages are disconnected, and the network cable is connected to a group of 1 by the PCBA board. 0 / 100M signal, a group of 10 / 100M signal is connected, and the data of the back stage is forwarded by the EtherCAT slave station; when the PCIE connector has a PCBA board, no matter how many PCBA boards are there, the PCBA inserted into the frontmost connector is connected to the 10 / 100M signal of the network cable, and the back stage connects a group of 10 / 100M signals, and the front-stage 10 / 100M signal of the PCB inserted into the second frontmost connector is connected to the back-stage 10 / 100M signal of the PCBA board inserted into the first frontmost connector. It can be achieved that no matter how many PCBA boards are inserted, the front stage of the inserted PCBA board is connected to the previous PCBA board or network cable, and the back stage of the inserted PCBA board is connected to the next PCBA board, forming a chain EtherCAT network topology, completing the communication needs of the master station to all slaves.

[0048] In the embodiment of the present application, the power supply circuit, the baseboard connector module, the USB hub module and the EtherCAT chain topology module are integrated on the same board level to form an integrated device connection device, which improves the integration and compactness of the system; the system supports two connection modes, USB and EtherCAT, which can meet the connection requirements of different devices and improve the flexibility and scalability of the system; the power supply circuit adopts an efficient voltage conversion and filtering voltage stabilization circuit to ensure the stability of the voltage and provide stable and reliable power supply for the system; the system realizes the chain connection of the EtherCAT slave station through an analog switch. When the connector is inserted into the PCBA board, the analog switch disconnects the front and rear stage signals to avoid signal interference and conflict and improve the reliability of the system; the system adopts a chain topology structure, which simplifies the wiring difficulty, reduces the maintenance cost and improves the maintainability of the system; the multi-device connection system with high integration, good flexibility, convenient power supply, high reliability and simple wiring in the embodiment of the present application has brought significant innovation and improvement to the connection technology between the USB interface and the device.

[0049] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention is disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent changes and modifications made to the above embodiments according to the technology of the present invention are within the scope of the technical solution of the present invention without departing from the content of the technical solution of the present invention.

Claims

1. An integrated connection system for USB and ETherCAT sub-devices, characterized in that: include: A power supply circuit, used for receiving an external 24V power supply and converting it into a required voltage output; A bottom board connector module, wherein the bottom board connector module comprises a plurality of connectors, and the plurality of connectors are sequentially connected to front and rear stage signals; A USB hub module, wherein the USB hub module comprises a first USB hub U3 and a second USB hub U4, wherein the first USB hub U3 is connected to the second USB hub U4, and the first USB hub U3 and the second USB hub U4 are respectively connected to a plurality of devices via a bottom board connector module; An EtherCAT chain topology module, wherein the EtherCAT chain topology module comprises an RJ45 network cable interface and a plurality of analog switches for realizing a chain connection of EtherCAT slave stations; Among them, the power supply circuit, the baseboard connector module, the USB hub module and the EtherCAT chain topology module are integrated on the same board level to form an integrated device connection device; the power supply module is used to supply power to the power supply circuit, the baseboard connector module, the USB hub module and the EtherCAT chain topology module.

2. An integrated connection system for USB and ETherCAT sub-devices according to claim 1, characterized in that: The plurality of connectors include connector CN1, connector CN2, connector CN3, connector CN4, connector CN5, connector CN6 and connector CN7, and the connectors CN1, connector CN2, connector CN3, connector CN4, connector CN5, connector CN6 and connector CN7 are connected to front and rear stage signals in sequence; The connector CN1, the connector CN2 and the connector CN3 are respectively connected to the first USB hub U3, and the second USB hub U4 is respectively connected to the connector CN4, the connector CN5, the connector CN6 and the connector CN7; The multiple analog switches include analog switch U5, analog switch U6, analog switch U7, analog switch U8, analog switch U9 and analog switch U10. The network cable interface RJ45 is signal-connected to the connector CN1. The analog switch U5 is connected between the connector CN1 and the connector CN2. The analog switch U6 is connected between the connector CN2 and the connector CN3. The analog switch U7 is connected between the connector CN3 and the connector CN4. The analog switch U8 is connected between the connector CN4 and the connector CN5. The analog switch U9 is connected between the connector CN5 and the connector CN6. The analog switch U10 is connected between the connector CN6 and the connector CN7.

3. An integrated connection system for USB and ETherCAT sub-devices according to claim 1, characterized in that: The power supply circuit includes a fuse F6, a fuse F7, a fuse F8, a fuse F9, a diode D1, a BUCK buck chip U1, an LDO chip U2, a capacitor C1, a capacitor C2, a capacitor C3 and a voltage-stabilizing diode D2. The fuse F6 is connected in parallel with the fuse F7. The external 24V power input is connected to the cathode of the diode D1 and the input end of the BUCK buck chip U1 after passing through the fuse F6 and the fuse F7. The anode of the diode D1 is grounded. The output end of the BUCK buck chip U1 is connected to one end of the capacitor C1 and the input end of the LDO chip U2, and the other end of the capacitor C1 is connected. The fuse F8 is connected in parallel with the fuse F9. The output end of the LDO chip U2 is connected to one end of the capacitor C2 and one end of the fuse F9. The other end of the capacitor C2 is grounded. The other end of the fuse F9 is connected to one end of the capacitor C3 and the cathode of the voltage-stabilizing diode D2. The other end of the capacitor C3 and the anode of the voltage-stabilizing diode D2 are grounded.

4. An integrated connection system for USB and ETherCAT sub-devices according to claim 3, characterized in that: The model of the LDO chip U2 is AZ1117-3.

3.

5. An integrated connection system for USB and ETherCAT sub-devices according to claim 1, characterized in that: The USB hub module further includes a transient voltage suppressor diode TVS1, and an external 5V power source supplies power to the first USB hub U3 and the second USB hub U4 via the transient voltage suppressor diode TVS1.

6. An integrated connection system for USB and ETherCAT sub-devices according to claim 1, characterized in that: The first USB hub U3 is provided with a PSEFL pin, and the PSEFL pin of the first USB hub U3 is connected to a resistor R14, and the resistance value of the resistor R14 is 4.7KΩ.

7. An integrated connection system for USB and ETherCAT sub-devices according to claim 1, characterized in that: The second USB hub U4 is provided with a PSEFL pin, and the PSEFL pin of the second USB hub U3 is connected to a resistor R28, and the resistance value of the resistor R28 is 4.7KΩ.

8. An integrated connection system for USB and ETherCAT sub-devices according to claim 2, characterized in that: The DP4 pin of the first USB hub U3 is connected to the DP0 pin of the second USB hub U4, and the DM4 pin of the first USB hub U3 is connected to the DM0 pin of the second USB hub U4; The DP1 pin of the first USB hub U3 is connected to the A9 pin and the B9 pin of the connector CN1, and the DM1 pin of the first USB hub U3 is connected to the A8 pin and the B8 pin of the connector CN1; The DP2 pin of the first USB hub U3 is connected to the A9 pin and the B9 pin of the connector CN2, and the DM2 pin of the first USB hub U3 is connected to the A8 pin and the B8 pin of the connector CN2; The DP3 pin of the first USB hub U3 is connected to the A9 pin and the B9 pin of the connector CN3, and the DM3 pin of the first USB hub U3 is connected to the A8 pin and the B8 pin of the connector CN3; The DP1 pin of the second USB hub U4 is connected to the A9 pin and the B9 pin of the connector CN4, and the DM1 pin of the second USB hub U4 is connected to the A8 pin and the B8 pin of the connector CN4; The DP2 pin of the second USB hub U4 is connected to the A9 pin and the B9 pin of the connector CN5, and the DM2 pin of the second USB hub U4 is connected to the A8 pin and the B8 pin of the connector CN5; The DP3 pin of the second USB hub U4 is connected to the A9 pin and the B9 pin of the connector CN6, and the DM3 pin of the second USB hub U4 is connected to the A8 pin and the B8 pin of the connector CN6; The DP4 pin of the second USB hub U4 is connected to the A9 pin and the B9 pin of the connector CN7, and the DM4 pin of the second USB hub U4 is connected to the A8 pin and the B8 pin of the connector CN7.

9. An integrated connection system for USB and ETherCAT sub-devices according to claim 2, characterized in that: The TD+ pin of the network cable interface RJ45 is connected to the B6 pin of the connector CN1 and the S3 pin of the analog switch U5, the TD- pin of the network cable interface RJ45 is connected to the B7 pin of the connector CN1 and the S4 pin of the analog switch U5, the RD+ pin of the network cable interface RJ45 is connected to the B14 pin of the connector CN1 and the S1 pin of the analog switch U5, and the RD- pin of the network cable interface RJ45 is connected to the B15 pin of the connector CN1 and the S2 pin of the analog switch U5.

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