USR-N520 2 Ports RS232 RS485 RS422 to Ethernet Converter

Communication Expert of Industrial IOT
USR-N520 2 Ports RS232 RS485 RS422 to Ethernet Converter
USR-N520 2 Ports RS232 RS485 RS422 to Ethernet Converter
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Price: $81.60
Availability: In Stock
Model: USR-N520
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User Manual:

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Introduction of serial to Ethernet converters / Adapters

USR-N520 is a 2 ports industrial serial device server convert RS232/RS485/RS422 data signal to TCPIP data over Ethernet/LAN network. It is internally integrated with TCP/IP protocol. It adopts Cortex-M4 solution and its basic frequency is up to 120MHz. USR-N520 serial to Ethernet converters / Adapters is easy to use. User can configure parameter by a standard web browser or USR setup software to realize remote data acquisition, remote control and management. This high performance networking serial to TCPIP server enables engineers spend little time to add networking function to products.


USR-N520 is a compact RS232 / RS485 / RS422 to Ethernet server for remote access serial electronic devices. By connecting USR-N520 to serial based equipment, user can easily offer Ethernet networking capability as a standard feature. So equipment can be accessed and controlled over the Internet network. USR-N520 is a two ports serial server, which supports RS-232 or RS-485 or RS-422 working at the same time.


This serial to Ethernet converter have 16 KByte receive/sending buffer of network and 2 KByte receive/sending buffer of serial, which makes the communication more stable and safe. It is CE(EMC+LVD), FCC, RoHS, and WEEE compliant.

Features of Serial Device Server

  • Modbus Gateway: Modbus RTU to Modbus TCP  (bidirectional communication)
  • Watch Dog: if N510 break down, it will restart automatically
  • Built in Web Server/Webpage for configuration
  • Bidirectional transparent Transmission, do not need data parser
  • Webpage socket to Serial (bidirectional communication)
  • Network Printing connectivity for printers with serial interface
  • Various protection for Serial interface, RJ-45 port and Power supply
  • Support DHCP client: automatically obtain an IP address and query IP address
  • DNS address can be modified
  • Hardware flow control CTS/RTS
  • Synchronous and adaptive Serial port baud rate
  • HTTP Client: send data as HTTP format automatically
  • Registration packet: identified header can be added to packets to check connection status
  • Heartbeat packet: can be sent to serial or network periodic. To ensure the connection is reliable, end the dead link

Working Modes of USR-N520 device server

Serial Device Server N520 can work as TCP Client, TCP Server, UDP Client,UDP Server Mode.

1) In TCP Client Mode: Client connects Server automatically. User should configure the TCP Server’s IP address and Port.

2) In TCP Server Mode: The Max Client number is 8.

3) In UDP Client Mode: serial data will be sent to a fix IP address/port which you appointed.

4) In UDP Server Mode: serial data will be sent to last source IP/Port.

Parameters of RS232 RS485 RS422 to TCPIP Adapter

Parameter Value
Input Voltage DC 5 ~ 36V
Input Current 95mA (aver) @ 5V, 45mA (aver) @ 12V
Certificate CE(EMC+LVD), FCC, ROHS ,WEEE
Size 150 x 79 x 30 mm
Operating Temp. -40 ~ 85°C
Storage Temp. -40 ~ 105°C, 5 ~ 95% RH (no condensation)
Interface RS232 RS485 RS422 *2
Network Protocol IP, TCP, UDP, DHCP, DNS, ARP, ICMP, Websocket, HTTP Client, Modbus TCP
Packing list USR-N520 *1 12V1A Power Adapter, Serial Cable

Protection of Serial to TCPIP Converter

Power Protection Reverse Protection
ESD Protection
Surge Protection
Serial Interface Protection ESD: 2KV

Applications of USR Serial to Ethernet Converters

This Serial to Ethernet converter is suitable for electronic devices with RS232 / RS485 / RS422 interface like: PLC, Scales, scanners, printers, Sensors and other industrail and commercial devices, to add network connectivity to those devices conveniently and uilding intelligent devices with remote control capability. You can also use USR RS232 RS485 RS422 to Ethernet converter into any electronic product for applications as below:

  • Industrial automation control for data transmission
  • Remote diagnostics, record and troubleshooting
  • Security monitoring, CCTV, entrance guard system, Building automation system
  • Power management
  • Environmental monitoring, temperature and humidity monitoring
  • Logistic transportation supervision and location

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