Unique Features

1. Modbus gateway, Modbus poll

2. Network printer function

3. ESD and Surge protection, watchdog mechanism

Serial Device Server Introduction

USR-N520 is a double serial device server, which can realize transparent transmission between TCP/UDP data package and RS232/RS485/RS422 interface. The device has unique functions such as network printing, Modbus multi-host polling and watchdog mechanism. USR-N520 is based on ARM processor and it is internally integrated with TCP/IP protocol.User can easily realize embedded device networking.

Serial Device Server Features

  • TI Cortex-M4 solution, ARM processor and TCP/IP protocol stack
  • Reload button,one key to restore factory defaults
  • Multiple indicator LEDs for easy debugging
  • DNS, DHCP, Websocket and HTTPD Client supported
  • Keepalive function,rapidly detect dead links
  • Built-in webpage, support customized
  • Can upgrade firmware via network easily
  • Account and password to page login and network settings
  • Support UDP broadcast,send and receive data from all IP in LAN
  • Global unique MAC address bought from IEEE, can be defined
  • Virtual serial port, setup and test software is availiable
  • Provide PC TCP/IP SOCKET programming example: VB, C++, Delphi, Android, IOS

Serial Device Server Parameter

RJ45 Port
Standard4 pin RJ45
Speed rate10/100Mbps, MDI/MDIX
Protection2KV electromagnetic isolation
ProtocalIP, TCP, UDP, DHCP, DNS, HTTP, ARP, ICMP, Websocket, HTTPD Client
BufferTX: 16K byte, RX: 16K bytes
COM Port
NumberRS232/RS485/RS485 * 2, choose one to use
StandardRS232: DB9 male connector, RS485: A+ B-, RS422: (A, B, Y, Z)
Baud rate600-230.4K bps
Data bit5, 6, 7, 8
Parity bitNone, Odd, Even, Space, Mark
Stop bit1, 2
BufferTX: 2K byte, RT: 2K byte
Flow controlRTS/CTS, Xon/Xoff
RS485 resistor2.2K Ω
ProtectionESD 2KV, lighting, surge
Power Input
Voltage5-36 V
TypeDC jacker and + - terminal
Working current53mA (average) @12 V
ProtectionESD, surge, reversed connect
Working Environment
Working tempreture-40 - 85 °C
Storage tempreture-40 - 105 °C
Storage humidity5% - 95% (no condensation)
Dimensions150*79*30 mm, without terminal
CertificationCE, FCC, ROHS, WEEE, KCC
Download filesUSR-N520


Serial Device Server Application Sample


Packing List

  • Serial Device Server * 1
  • RS232 to RS485/RS422 converter *2
  • Power adapter * 1
  • Serial cable * 1


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2 ports Serial Device Server RS232 RS485 RS422 to Ethernet Converter USR-N520

  • Product Code: USR-N520
  • Availability: Out Of Stock
  • Rs.5,990.00

Tags: rs232, rs485, rs422, serial, server, USR-N520