USR-N540 is a four serial device server, which can realize bidirectional transparent transmission between serial RS232 / RS485 / RS422 and Ethernet TCP/IP protocol with Modbus gateway function.

€158.00 VAT excluded

€189.60 VAT included

In stock

USR-N540 is a four serial device server, which can realize bidirectional transparent transmission between serial RS232 / RS485 / RS422 and Ethernet TCP/IP protocol with Modbus gateway function


- Communication between RS232/RS485/RS422 and Ethernet

- Modbus gateway, Watchdog mechanism, ESD + EFT protection

- Flow control: CTS/RTS + XON + XOF


Serial Device Server Features

- TI cortex-M4 solution, ARM processor and TCP/IP protocol stack

- Working temperature range: from -40 up to 85ºC

- Web Server: Web socket / Web to Serial

- Modbus Gateway: Modbus RTU - Modbus TCP / Modbus Polling

- Flow Control: CTS/RTS, XON/XOFF

- Network printer function

- N series supports hardware watchdog, never crash

- Multiple indicator LEDs for easy debugging

- Power-line terminal for industrial application

- ARM kernel and TCP/IP protocol stack

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

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

- Two ports can work independently at the same time

- 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, VB, C++, Delphi, Android, 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, user can define MAC address

- Upgrade firmware via network

- 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 transmisison bewteen webpage and serial 0

- Support UDP broadcast function, send and receive data from all ip in the network

- Possibility to mount on DIN Rail with DIN Rail Clip

- Power adapter for electric socket included, possibility to power by DIN-Rail Power supply

- Product is designed for industrial applications with emphasis for durability, functionality and robustness

- Product has CE certification for EU market

- This product is RoHS compliant


Data sheet

Designed for industry use
Way of use
Standalone functional unit
Network interface
Serial interface
Modbus support
Modbus RTU - Modbus TCP


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