USR-N540 - 4-Port Industrial Serial to Ethernet Device Server

The USR-N540 is an industrial-grade 4-port Ethernet device server designed for bi-directional transparent data transmission between RS232, RS485, RS422 serial devices and Ethernet networks. Ideal for industrial automation, IoT, and remote monitoring applications, it allows multiple serial devices to connect seamlessly to TCP/IP networks without altering existing communication protocols.

The device supports four 3-in-1 serial ports (RS232/RS422/RS485) mapped to a single 10/100 Mbps self-adaptive Ethernet interface, enabling flexible network deployment. Configuration is simple via Web Server, AT commands, or Windows utility, and it supports a wide range of industrial networking protocols.

Key Features

• 4-port RS232/RS422/RS485 to Ethernet converter
• Bi-directional transparent transmission between serial and network
• Wide voltage input: DC 9-36 V for industrial environments
• Supports TCP server/client, UDP server/client, HTTPS client, Virtual COM
• Modbus RTU to Modbus TCP protocol conversion
• Flow control: CTS/RTS, XON/XOFF
• Easy configuration via Web Server, AT commands, or Windows Utility
• Industrial-grade reliability for continuous operation

Specifications

• Category: Cellular & Network Communication
• Manufacturer / Brand: USR IOT
• Ethernet Ports: LAN, WAN (10/100 Mbps)
• Serial Standards: RS232, RS422, RS485
• Communication Method: Serial
• Supported Protocols: ARP, DHCP, DNS, Ethernet, HTTP, HTTPD Client, ICMP, IP, TCP, UDP, WebSocket
• Supply Voltage: 9-24 VDC
• Operating Temperature: -40 C to 85 C (-40 F to 185 F)

Mechanical

• Dimensions: 222 × 122 × 29 mm (W × D × H) / 8.74 × 4.80 × 1.14 in
• Weight: 1.36 kg (3.00 lbs)

Certifications

• CE
• FCC
• RoHS

What's in the box
1 x USR-N540 - 4-Port Industrial Serial to Ethernet Device Server