Multi-port Ethernet communication centralized control circuit with POE

Abstract

The utility model belongs to the technical field of Ethernet communication, and particularly relates to a multi-port Ethernet communication centralized control circuit with a POE (Power Over Ethernet). The power supply unit is respectively connected with the main control unit and the communication unit to supply power, the main control unit and the communication unit are connected through a second RS485 circuit, and the communication unit is connected with a Flash / SRAM expansion circuit, a USB firmware upgrading circuit, an Ethernet PHY circuit and a second RS232 circuit through a second main control MCU. The Ethernet PHY circuit is connected with an Ethernet port, and the Ethernet port is also connected with a PES output unit. A plurality of Ethernet connection ports are realized, multiple devices are supported to access the Ethernet at the same time, and the POE power supply of a single port is supported.

Description

Technical Field

[0001] The utility model belongs to the technical field of Ethernet communication, and in particular relates to a multi-port Ethernet communication centralized control circuit with POE. Background Art

[0002] Nowadays, many microprocessor chips have built-in Ethernet MAC. It is necessary to add an Ethernet PHY chip to enable the device to access the Ethernet. It can only support the device to access the Ethernet individually. When the device is connected to the Ethernet, there are few ports, it cannot be expanded, and it does not have external POE power supply. In view of the above problems, a multi-port Ethernet communication centralized control circuit with POE is provided. Utility Model Content

[0003] In order to solve the defects and shortcomings of the prior art, the purpose of the utility model is to provide a multi-port Ethernet communication centralized control circuit with POE which has a simple structure, reasonable design and easy use. It realizes multiple Ethernet connection ports, supports multiple devices to access the Ethernet at the same time, and supports single-port POE power supply.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: it includes a power supply unit, a main control unit, a communication unit, and a PES output unit; the power supply unit is respectively connected to the main control unit and the communication unit for power supply, and the main control unit and the communication unit are connected through RS485 circuit 2, wherein the communication unit is connected to a Flash / SRAM expansion circuit, a USB firmware upgrade circuit, an Ethernet PHY circuit, and an RS232 circuit 2 through a main control MCU 2; the Ethernet PHY circuit is connected to an Ethernet port, and a PES output unit is also connected to the Ethernet port.

[0005] Preferably, the main control unit comprises a main control MUC, an infrared receiving circuit, a digital I / O circuit, an audio control circuit, a 24V fire signal monitoring circuit, an infrared transmitting circuit, a relay control circuit, an RS422 circuit, an RS485 circuit, and an RS232 circuit; the main control MUC is connected to an infrared receiving circuit, a digital I / O circuit, an audio control circuit, a 24V fire signal monitoring circuit, an infrared transmitting circuit, and a relay control circuit, and external communication is carried out through the communication serial port RS422 circuit, RS485 circuit, and RS232 circuit.

[0006] Preferably, the master control MUC 1 adopts STM32F407ZGT6 single chip microcomputer.

[0007] Preferably, the PES output unit adopts the LTC4263CDE single chip microcomputer.

[0008] After adopting the above structure, the beneficial effects of the utility model are: it realizes multiple Ethernet connection ports, supports multiple devices to access the Ethernet at the same time, and supports single-port POE power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the utility model is described in detail through the following specific implementations and drawings.

[0010] Figure 1 It is a structural schematic diagram of the utility model;

[0011] Figure 2 It is a schematic diagram of a circuit of a power supply unit 1 of the utility model;

[0012] Figure 3 This is a schematic diagram of a second circuit of a power supply unit 1 of the present utility model;

[0013] Figure 4 This is a circuit diagram of the main control unit 2 of the utility model;

[0014] Figure 5 It is a circuit diagram of the Ethernet PHY circuit 34 of the utility model;

[0015] Figure 6 This is a circuit diagram of the communication unit 3 of the utility model;

[0016] Figure 7 This is a circuit diagram of the Ethernet port 36 of the utility model;

[0017] Figure 8 This is a circuit diagram of the PES output unit 4 of the utility model;

[0018] Explanation of the accompanying drawings: power supply unit 1, main control unit 2, communication unit 3, PES output unit 4, RS485 circuit two 5, main control MCU two 31, Flash / SRAM expansion circuit 32, USB firmware upgrade circuit 33, Ethernet PHY circuit 34, RS232 circuit two 35, Ethernet port 36, RS232 circuit one 20, main control MUC one 21, infrared receiving circuit 22, digital I / O circuit 23, audio control circuit 24, 24V fire signal monitoring circuit 25, infrared transmitting circuit 26, relay control circuit 27, RS422 circuit 28, RS485 circuit one 29. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is described below by specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0020] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme according to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0021] See Figure 1 As shown, this specific implementation adopts the following technical scheme: it includes a power supply unit 1, a main control unit 2, a communication unit 3, and a PES output unit 4; the power supply unit 1 is respectively connected to the main control unit 2 and the communication unit 3 for power supply, and the main control unit 2 and the communication unit 3 are connected via an RS485 circuit 2 5, wherein the communication unit 3 is connected to a Flash / SRAM expansion circuit 32, a USB firmware upgrade circuit 33, an Ethernet PHY circuit 34, and an RS232 circuit 2 35 via a main control MCU 2 31; the Ethernet PHY circuit 34 is connected to an Ethernet port 36, and the Ethernet port 36 is also connected to a PES output unit 4.

[0022] Among them, the main control unit 2 includes a main control MUC-21, an infrared receiving circuit 22, a digital I / O circuit 23, an audio control circuit 24, a 24V fire signal monitoring circuit 25, an infrared transmitting circuit 26, a relay control circuit 27, an RS422 circuit 28, an RS485 circuit-29, and an RS232 circuit-20; the main control MUC-21 is connected with an infrared receiving circuit 22, a digital I / O circuit 23, an audio control circuit 24, a 24V fire signal monitoring circuit 25, an infrared transmitting circuit 26, and a relay control circuit 27, and external communication is carried out through the communication serial port RS422 circuit 28, RS485 circuit-29, and RS232 circuit-20.

[0023] In addition, the master control MUC-21 adopts STM32F407ZGT6 single chip microcomputer; the PES output unit 4 adopts LTC4263CDE single chip microcomputer.

[0024] The working principle of this specific implementation is:

[0025] See also Figure 2 , Figure 3, the power supply unit 1 is powered by DC48V, which is stepped down to 15V by two step-down switching power supply chips U1 and U2, EG1182. The 15V is then output to 5V to the subsequent LDO through the DC-DC step-down chip U3 (MP2307). The LDO used is AMS1117-3.3, which outputs 3.3V to power the main control unit 2 and the communication unit 3. The 3.3V output by U4 is used to power the main control unit 2, and the 3.3V output by U5 is used to power the communication unit 3; the 48V power supply is also used to power the PES output unit 4 (chip U6-LTC4263), and U6 is a single-channel PSE controller of the IEEE 802.3af standard.

[0026] See also Figure 4 , Figure 5 The master control MUC-21 (chip U7) in the master control unit 2 uses STM32F407ZGT6, P1 is the burning interface of the MCU, and the master control chip has a 10 / 100Mbit / s Ethernet MAC core, which can be connected to the external Ethernet PHY circuit 34 through the MII / RMII interface to achieve access to the Ethernet.

[0027] See also Figure 6 , Figure 7 The main control MCU 231 (chip U9) inside the communication unit 3 is connected to U7 through the RMII interface to access the Ethernet. Y3 provides RMII clock for U9 and U7. The Ethernet differential signal of U9 is connected to the port 2 of the U10 Ethernet through the U8 network transformer. U10 has 5 groups of Ethernet ports, and port 2 is connected to U9; port 0 is connected to P3 through ESD1 and U12. P3 is an internal expansion interface and can be connected to other switch modules to increase the device Ethernet interface; port 3 and port 4 are connected to the dual-port RJ45 network port after passing through ESD2, ESD3, U13, and U14. U6 provides POE power supply for one of the network ports, which can power the PD device.

[0028] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0029] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A multi-port Ethernet communication centralized control circuit with POE, characterized in that: It includes a power supply unit, a main control unit, a communication unit, and a PES output unit; the power supply unit is respectively connected to the main control unit and the communication unit for power supply, and the main control unit and the communication unit are connected via RS485 circuit 2, wherein the communication unit is connected to a Flash / SRAM expansion circuit, a USB firmware upgrade circuit, an Ethernet PHY circuit, and RS232 circuit 2 via a main control MCU 2; the Ethernet PHY circuit is connected to an Ethernet port, and a PES output unit is also connected to the Ethernet port.

2. A multi-port Ethernet communication centralized control circuit with POE according to claim 1, characterized in that: The main control unit comprises a main control MUC, an infrared receiving circuit, a digital I / O circuit, an audio control circuit, a 24V fire signal monitoring circuit, an infrared transmitting circuit, a relay control circuit, an RS422 circuit, an RS485 circuit, and an RS232 circuit; the main control MUC is connected with an infrared receiving circuit, a digital I / O circuit, an audio control circuit, a 24V fire signal monitoring circuit, an infrared transmitting circuit, and a relay control circuit, and external communication is carried out through the communication serial port RS422 circuit, RS485 circuit, and RS232 circuit.

3. A multi-port Ethernet communication centralized control circuit with POE according to claim 1, characterized in that: The main control MCU is a STM32F407ZGT6 single chip microcomputer.

4. A multi-port Ethernet communication centralized control circuit with POE according to claim 1, characterized in that: The PES output unit adopts the LTC4263CDE single chip microcomputer.

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