2 Ports Serial to Ethernet Converters | Industrial Communication

Serial to Ethernet Converter, 2 Ports

Model: USR-N520

USR-N520 is a 2 Ports Serial to Ethernet Converter, which can realize transparent transmission between TCP/UDP data package and RS232/RS485/RS422 interface.
  • 2 serial ports, RS232 RS485 RS422 three-in-one
  • Voltage range of 5~36v DC
  • Modbus RTU to Modbus TCP, CTS/RTS, XON/XOFF
  • 2 serial port can works simultaneously
  • 2 Ports Serial to Ethernet Converters | Industrial Communication

    General Details



    Basic Function


    Industrial Hardware Design

    Industrial solution TI cortex-M4


    Watch dog

    Hardware watchdog design,
    never crash in 24 hours


    Serial Ports

    Baud rate: 600bps~230.4Kbps
    Hardware flow control: RTS/CTS
    Software flow control: XON/XOFF
    Serial data can be divided into frames flexibly


    Serial Port Switching Among RS232/RS485/RS422


    Power supply supports Anti-reverse

    Wide voltage: 5~36V


    Function Structure


    RS232 RS485 RS422 Ethernet Converter

    USR-N520 is a double serial ethernet converter, which can realize transparent transmission between TCP/UDP data package and RS232/RS485/RS422 interface. User can easily realize embedded device networking.

    Industrial Solution TI Cortex M4 Solution, -40~85C
    Web Server Web socket/ Web to Serial
    Modbus Gateway Modbus RTU to Modbus TCP / Modbus Pollinig
    Flow Control CTS/RTS, XON/XOFF
    Protection Watchdog circuit, never cash
    ESD 8KV
    Network Network Printing
    2 network links, each serial support sending data to two servers

    Features of 2 ports RS232 RS485 RS422 Ethernet Converter

    Cortex-M4 kernel,industrial working temperature range and TCPIP protocol stack.

    Auto-MDI/MDIX,RJ45 port with 10/100Mbps

    TCP Server,TCP Client,UDP Client,UDP Server and HTTPD Client work mode

    Support network printing

    Support Modbus multi-host polling

    Two ports can work independently at the same time

    Support Modbus RTU to Modbus TCP

    Can distinguish which serial port connects to the device via port number

    Support virtual serial port and provide corresponding software USR-VCOM

    Serial baud rate from 600bps to 230.4K bps;Check bit of None,Odd,Even,Mark and Space

    DNS and DHCP supported

    Provide PC TCP/IP socket programming example such as VB,C++,Delphi,Android and IOS

    Built-in webpage;also can customize webpage for users

    Reload button,one key to restore default settings

    RJ45 with Link/Data indicator light,built-in isolation transformer and 2 KV electromagnetic isolation

    The global unique MAC address bought from IEEE (begin with D8-B0-4C);user can define MAC address

    Support upgrade firmware via network

    Support keepalive,rapidly detect dead links

    Support account and password,can be used to page login and network settings

    Support one channel Websocket,realize bidirectional transparent transmission between webpage and serial 0

    Two serial ports;each serial can work as rs232,rs485 or rs422;DB9 female;provide rs485/rs422 converter

    Two channel serial communication indicator: TX/RX

    Support DC adapter and 5.08-2 terminal power supply

    Support UDP broadcast function


    Simple Transparent transmission of RS232 RS485 RS422 Ethernet Converter

    Transparent transmission means that whatever is transferred, our device plays the role of a channel and sends data to the target without modification. On-site monitoring equipment sends data to Serial Device Servers transparent data transmission terminal by itself port, the terminal CUP receives data by serial port and package data.


    Various parameter setting method of RS232 RS485 RS422 Ethernet Converter

    Software Settings
    Download settings software, search related Serial Device Servers in the LAN through the serial port server IP, name, MAC address, or the version number. Then set the parameters you need, otherwise keep the default.


    Web-page Settings

    1.Open your browser and inter the default IP address of the Serial Device Servers.

    2.Open the login page of Serial Server, Enter the user name and password (default admin).

    3.After setting parameter, Click Save and Restart, then setting will take effect.


    Serial AT commands Settings
    User can set parameter by module itself without going through another computer to configure. This setting method is used in the following situation: user have to configure IP address and destination IP address on site. AT command can meet the demand. After MCU connects serial server module by TTL (UART), MCU can configure setting by AT command.


    Application Field of 2 ports RS232 RS485 RS422 Ethernet Converter

    Industrial data transmission, industrial automation

    security and protection monitoring, public security

    Smart home, power control, environmental monitoring, intelligent agriculture

    Door check on work attendance system, POS system, rice selling system

    Building automation system, power monitoring, self-service banking system, telecom machine room monitoring

    images of serial to ethernet converter-n520


    System Information
    Processor Cortex-M4
    Basic Frequency 120MHz
    Flash 512K byte
    Port Number 1
    Interface Standard RJ45
    Rate 10/100 Mbps MDI/MDIX, auto switch between cross and direct connection
    Protection 2KV electromagnetism isolation, shell insulation blocking
    Network Protocol IP, TCP, UDP, DHCP, DNS, HTTP, ARP, ICMP, Websocket, HTTPD Client
    Receive Buffer Max 16k bytes buffer
    Port Number 2 (RS232/485/422*2), 2 serial ports can simultaneously work at the different working modes.
    Interface Standard
    RS-232: TX/RX/RTS/CTS
    RS-485: A+/B- 
    RS422: TX+/TX-/RX+/RX-
    Data Bits 5, 6, 7, 8
    Stop Bit 1, 2
    Check Bit None, Even, Odd, Space, Mark
    Baud Rate 600 bps ~ 230K bps
    Flow Control RTS/CTS/Xon/Xoff
    Buffer Send and receive 2k bytes respectively
    Protection ESD protection, anti-surge
    Transparent Transmission Mode TCP Server/TCP Client/UDP Server/UDP Client
    Supported Function Networking printing, Modbus Gateway, USR-Cloud, self-defined registration package, self-defined network and serial heartbeat package
    SocketB TCP Client/UDP Client
    Virtual Serial(USR-VCOM) Windows 2000 or higher (32 bit/64 bit)
    Configuration Built-in webpage, computer set-up software, serial command
    Basic Parameter
    Size 150 x 79 x 30 mm
    Operating Temp. -40 ~ 85°C
    Storage Temp. -45 ~ 105°C, 5 ~ 95% RH
    Input Voltage DC 5 ~ 36V
    Working Current
    95mA (aver) @ 5V
    45mA (aver) @ 12V
    Power <1W
    Certificate CE, FCC, ROHS, KCC and WEEE pending
    Warranty 2 years
    Accessory 12V power supply, serial line, cable, converter


    User Manual

    [User Manual] USR-N520 Quick Start Guide | download
    [User Manual]USR-N520-User-Manual-EN-V1.0.4 | download
    [Datasheet] USR-N520 Datasheet | download
    [AT Command] USR-N520 AT Command Set | download
    [User Manual] Virtual-COM-Software-USR-VCOM-creates-TCP-Client-port | download
    [User Manual] Virtual-COM-Software-USR-VCOM-creates-TCP-Server-port | download
    [User Manual] Websocket-function-of-Industrial-M4-serial-to-Etherent-products_V1.0.0 | download
    [User Manual] Modbus-Gateway-Manual-of-Industrial-M4-Serial-to-Ethernet_V1.0.0 | download
    [User Manual] TCP-Server-mode-and-TCP-Client-mode-manual_V1.0.0 | download
    [User Manual] Transparent-transmission-between-USRIOT-Serial to Ethernet-products | download
    [User Manual] UDP-Server-mode-and-UDP-Client-mode-manual_V1.0.0 | download
    [User Manual] USR-N5xx-realize-Modbus-RTU-Master&Modbus-TCP-Slave-communication_V1.0.0 | download
    [User Manual] Upgrading-firmware-method-of-Serial-to-Ethernet-products_V1.0.2 | download
    [User Manual] Setting-Agreement | download

    Development File

    [Demo Code] TCPIP Demo Code | download
    [Config Protocol] E45&M4 Series Config Protocol V1.4 | download
    [Customized Webpage] M4 Series Customized Webpage | download

    Application Software

    [USR-VCOM] Virtual Serial Software V3.7.1.520 | download
    [USR-TCP-Test] Testing Software | download
    [USR-TCP-Test_android] Testing Software | download
    [USR-M4] USR-M4 Setup Software V2.3.4.102 | download

    Product Certificates

    [Certificate] M4 Series CE FCC ROHS WEEE Certificate | download
    [CE Certificates] ce-certificates-serial-to-ethernet-module-2017 | download
    [Certificate] ROHS2.0-Certificates-For-Serial-Etherent | download

    Company File

    [Product Catalog] USR Product Catalog | download

    How to Buy

    Official Online ShopClick to order USR-N520
    Alibaba Online ShopClick to order USR-N520
    Contacts SalesYou can leave a message for our sales below.


    Model Interface
    Low cost M0 Serial to Ethernet converter

    DHCP, DNS, HTTPD Client, Webpage

    USR-TCP232-302 RS232
    USR-TCP232-304 RS485
    USR-TCP232-306 RS232/RS485/RS422

    Multi COMs Industrial M4 Serial to Ethernet Converter

    Modbus Gateway: Modbus RTU to TCP, Modbus Polling. Websocket: Web to serial. Customized webpage, Flow control CTS/RTS

    USR-TCP232-410s RS232&RS485 *1
    USR-N510 RS232/RS485/RS422 *1
    USR-N520 RS232/RS485/RS422 *2
    USR-N540 RS232/RS485/RS422 *4



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