CN219247845U

CN219247845U - Conversion device for converting Ethernet into optical fiber

Info

Publication number: CN219247845U
Application number: CN202223540205.8U
Authority: CN
Inventors: 华坤; 陈志浩
Original assignee: Aotuo Technology Co ltd
Current assignee: Aotuo Technology Co ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-06-23
Anticipated expiration: 2032-12-29

Abstract

The utility model discloses a conversion device for converting Ethernet into optical fibers, and relates to the technical field of computers. In the industrial field network communication process, network communication media are changed in a low-cost mode, and hardware upgrading is avoided to meet the field network communication requirement. The conversion device comprises two PHY chips and an SFP optical module, wherein the PHY chips are provided with a receiving and transmitting interface, a SerDes interface and an RGMII interface, the RGMII interfaces in the two PHY chips are kept connected, the SerDes interface of one PHY chip is connected with the SFP optical module, and the receiving and transmitting interface of the other PHY chip is used for being connected with an Ethernet. Through the connection of the two PHY chips, the transformation of network communication media is realized, and the network signals communicated by twisted pair wires are converted into optical signals for network transmission.

Description

Conversion device for converting Ethernet into optical fiber

Technical Field

The utility model relates to the technical field of computers.

Background

With the continuous deep integration of informatization and industrialization, an industrial control system increasingly adopts a standardized communication protocol and software and hardware, and realizes remote control and operation through the internet, in an industrial network, a large number of networks are all in communication based on twisted pair, if an opposite network uses an optical fiber as a medium for signal transmission, the network interface of the conventional device cannot meet the application requirement, and if an optical fiber switch is adopted, the cost is too high, so that a conversion device is required to convert network signals of twisted pair communication into optical signals for network transmission.

Disclosure of Invention

Aiming at the problems, the utility model provides a conversion device for converting Ethernet into optical fiber, which can finish the network communication medium conversion in the industrial field network communication process in a low-cost mode, and avoid hardware upgrading to meet the field network communication requirement.

The technical scheme of the utility model is as follows: the conversion device comprises two PHY chips and an SFP optical module, wherein the PHY chips are provided with a receiving and transmitting interface, a SerDes interface and an RGMII interface, the RGMII interfaces in the two PHY chips are kept connected, the SerDes interface of one PHY chip is connected with the SFP optical module, and the receiving and transmitting interface of the other PHY chip is used for being connected with an Ethernet.

The model of the PHY chip is YT8521S.

The conversion device further comprises a power supply mechanism, wherein the power supply mechanism comprises a 5V power supply interface, a 24V power supply interface, a first voltage conversion circuit and a second voltage conversion circuit, the first voltage conversion circuit is used for converting a 24V power supply into a 5V power supply, and the second voltage conversion circuit is used for converting the 5V power supply into a 3.3V power supply;

the 24V power interface is connected with the first voltage conversion circuit, the first voltage conversion circuit and the 5V power interface are simultaneously connected with the second voltage conversion circuit, and the second voltage conversion circuit is also simultaneously connected with two PHY chips and RJ45 with isolation.

The SFP optical module is connected with an optical fiber.

The receiving and transmitting interface of the PHY chip for connecting the Ethernet is connected with an RJ45 with isolation, and the RJ45 with isolation is connected with a network cable of the Ethernet.

The schematic diagram of the ethernet-to-optical fiber is shown in fig. 1, and mainly comprises two PHY chips with SerDes interfaces and an optical module with SFP interfaces, and the working process of the system is as follows:

1. the first-stage PHY chip is used for mainly converting the twisted pair network signals into RGMII signals;

2. the second-stage PHY chip converts the RGMII signal into a SerDes interface signal;

3. the SerDes interface signals are converted into corresponding optical signals through the SFP optical module to be transmitted through the optical fiber network;

4. in the whole communication process, data is transmitted in two directions, namely, the data can pass through the device from a twisted pair to an optical fiber network, and the data in the optical fiber network is converted into the twisted pair network through the module by science and technology;

5. the communication speed in the twisted pair network is always the same as the communication speed in the optical fiber network, namely, the speed in the optical fiber network is 100M.

6. The whole control process adopts a domestic scheme for 100%, the PHY chip adopts YT8521S of Yutai train communication, the chip has 10M/100M/1000M communication self-adaption capability, and is provided with SerDes and RGMII communication interfaces, and the working voltage is 3.3V.

The utility model realizes the transformation of network communication media by connecting two PHY chips, and converts the network signals of twisted pair communication into optical signals for network transmission; the selected PHY chip needs to be provided with a SerDes interface; the input of the module is an Ethernet interface, and the output is an SFP interface, so that the optical modules with different rates can be matched according to the Ethernet rate, and in addition, different optical modules can be replaced according to different optical fibers which are wired on site, so that the requirements of different field networks are met as far as possible, and the hardware is not required to be manufactured again; the module is powered by two voltages, 24V and 5V meet the requirements of industrial sites and civil sites; the module can simply complete the network communication of different media without upgrading and reforming the whole hardware of the system.

Drawings

FIG. 1 is a block diagram of the present utility model;

FIG. 2 is a schematic diagram of the operation of the present utility model;

FIG. 3 is a block diagram of an internal bus of a PHY chip according to the present utility model;

fig. 4 is a schematic diagram of RGMII interface connection between PHY chips in the present utility model.

Detailed Description

In order to clearly illustrate the technical features of the present patent, the following detailed description will make reference to the accompanying drawings.

As shown in fig. 1-4, the scheme adopts two PHY chips and an optical module of an SFP interface, and the whole system block diagram is shown in fig. 2. There may be two power inputs externally: 5V and 24V,24V are mainly used in industrial sites, 5V is mainly convenient for connecting with the existing universal charger interface. After 24V changes 5V, then with the external input 5V supply power to 5V changes 3.3V power supply circuit, the 3.3V that changes supplies power to the whole system: the system comprises a PHY chip peripheral circuit and an SFP optical module.

Signals input by an external twisted pair enter a PHY chip through an isolated RJ45, the PHY chip converts the input signals into RGMII signals, the RGMII signals are converted into SerDes signals through another PHY chip, and the SerDes signals are input into optical signals through an SFP optical module and are transmitted in an optical fiber network. The communication rate of the optical fiber network must be consistent with the communication rate of the twisted pair, and if the communication rate in the bilinear mode is 100 megabits, the SFP optical module can only select 100 megabits of communication module.

YT8521S is a domestic PHY chip developed by Yu Tai vehicle, is a highly integrated Ethernet transceiver, and accords with 10BASE Te, 100BASE-TX and 1000BASE-T IEEE 802.3 standards. It provides the physical layer functions required for transmission and reception, and packets on the ethernet are transmitted via CAT5E UTP cable.

YT8521S uses advanced DSP technology and Analog Front End (AFE) to achieve high speed data transmission, transmission and reception over UTP cable. Cross detection and auto correction, polarity etc. functional correction, adaptive equalization, crosstalk cancellation, echo cancellation, timing recovery and error correction are implemented in YT8521S at 10Mbps, 100Mbps, or 1000Mbps. Data transmission between the MAC and PHY is through a Reduced Gigabit Media Independent Interface (RGMII) interface for communication of 1000BASE-T, 100BASE-TX and 10 BASE-Te. The RGMII interface consists of physical coding sublayer transmission and physical coding sublayer reception.

The YT8521S needs to provide an external crystal oscillator to generate a system time, the external crystal oscillator generates a system clock through a phase-locked loop, and the timing recovery function module controls the phase selector to provide a clock for the ADC.

The YT8521S externally provides 3.3V power, a switching power circuit is integrated inside to convert the voltage into 1.2V for internal use, and the YT8521S requires an external bias resistor of 2.49K.

The YT8521S provides a SerDes interface for interfacing with the optical module, while providing a management interface for accessing the YT8521S internal registers, and LED lighting control for indicating network communication rate. LED0 is lighted, communication rate 10Mbps, LED1 is lighted, communication rate 100Mbps, LED2 is lighted, and communication rate 1000Mbps.

Fig. 3 is a system architecture of YT 8021S.

The two PHY chips are connected through an RGMII signal, but the RGMII signal needs to be cross-connected to communicate normally, as shown in fig. 4, the receiving signal of the PHY chip 1 is connected to the transmitting signal of the PHY chip 2, and the transmitting signal of the PHY chip 1 is connected to the receiving signal of the PHY chip 2.

While there have been described what are believed to be the preferred embodiments of the present utility model, it will be apparent to those skilled in the art that many more modifications are possible without departing from the principles of the utility model.

Claims

1. A conversion device for converting ethernet into optical fiber, wherein the conversion device comprises two PHY chips and an SFP optical module, the PHY chips have a transceiver interface, a SerDes interface and an RGMII interface, the RGMII interfaces in the two PHY chips remain connected, and the SerDes interface of one PHY chip is connected with the SFP optical module, and the transceiver interface of the other PHY chip is used for connecting ethernet.

2. The device for ethernet to fiber conversion according to claim 1, wherein said PHY chip is model number YT8521S.

3. The conversion device for converting ethernet into optical fiber according to claim 1, further comprising a power supply mechanism, wherein the power supply mechanism comprises a 5V power interface, a 24V power interface, a first voltage conversion circuit and a second voltage conversion circuit, wherein the first voltage conversion circuit is used for converting 24V power into 5V power, and the second voltage conversion circuit is used for converting 5V power into 3.3V power;

the 24V power interface is connected with the first voltage conversion circuit, the first voltage conversion circuit and the 5V power interface are simultaneously connected with the second voltage conversion circuit, and the second voltage conversion circuit is also simultaneously connected with two PHY chips.

4. A conversion device for ethernet to optical fiber according to any of claims 1-3, wherein said SFP optical module is connected to an optical fiber.

5. A conversion device for converting ethernet into optical fiber according to any of claims 1-3, wherein the transceiver interface of the PHY chip for connecting to ethernet is connected with an RJ45 with isolation, the RJ45 with isolation being connected to a network cable of ethernet.