Products
Product Classification
Data download
Serial to Ethernet/WiFi Serial to Ethernet converters connect devices with an RS232, RS422, or RS485 serial interface to a local area network to transmit serial data over Ethernet. With a physical wired Ethernet network connection on one side, and one or more serial ports on the
Serial to Ethernet(MQTT/SSL)
Serial to Ethernet(Cost-effective)
Serial to WiFi
serial to ethernet(classic version)
Serial to Ethernet(MQTT/SSL)
USR-N580 8*RS485 Ports Serial Ethernet Converter
● Secure Client work mode: TCPS, HTTPS, MQTTS
● SSL/TLS Encryption in TCP client, HTTP Client and MQTT modes
● Cloud support: MQTT via AWS IOT, Microsoft Azure, Thingsboard, Alibaba Cloud, EMQX, Tuya,Cumulocity IoT and so on
● High Reliability and Stability:EFT-IEC61000-4-4 Level 3(±2KV),Built-in hardware watchdog,ESD-IEC61000-4-2 Level 4
● Redundant Power Supply
● Support TCP server/client, UDP server/client, https client, Virtual COM
● 8-port 485 Modbus Gateway (3-in-1 serial port RS232/RS485/RS422 Optional)
● Wide voltage input range DC 5-36V
● Flow control XON/XOFF
● Configuration via Web Server page, AT commands, and Windows Utility
● 2 Ethernet ports,switch function, cascade connection
USR-N510 1*RS485 Ports Serial Ethernet Converter
● Secure Client work mode: TCPS, HTTPS, MQTTS
● SSL/TLS Encryption in TCP client, HTTP Client and MQTT modes
● Cloud support: MQTT via AWS IOT, Microsoft Azure, Thingsboard, Alibaba Cloud, EMQX, Tuya,Cumulocity IoT and so on

● High Reliability and Stability:EFT-IEC61000-4-4 Level 3(±2KV),Built-in hardware watchdog,ESD-IEC61000-4-2 Level 4 
● Redundant Power Supply
● Support TCP server/client, UDP server/client, https client, Virtual COM
● 1-port 485 Modbus Gateway (3-in-1 serial port RS232/RS485/RS422 Optional)
● Wide voltage input range DC 5-36V
● Flow control XON/XOFF
● Configuration via Web Server page, AT commands, and Windows Utility
USR-N520 2*RS485 Ports Serial Ethernet Converter
● Secure Client work mode: TCPS, HTTPS, MQTTS
● SSL/TLS Encryption in TCP client, HTTP Client and MQTT modes
● Cloud support: MQTT via AWS IOT, Microsoft Azure, Thingsboard, Alibaba Cloud, EMQX, Tuya,Cumulocity IoT and so on

● High Reliability and Stability:EFT-IEC61000-4-4 Level 3(±2KV),Built-in hardware watchdog,ESD-IEC61000-4-2 Level 4 
● Redundant Power Supply
● Support TCP server/client, UDP server/client, https client, Virtual COM
● 2-port 485 Modbus Gateway (3-in-1 serial port RS232/RS485/RS422 Optional)
● Wide voltage input range DC 5-36V
● Flow control XON/XOFF
● Configuration via Web Server page, AT commands, and Windows Utility
USR-N540 4*RS485 Ports Serial Ethernet Converter
● Secure Client work mode: TCPS, HTTPS, MQTTS
● SSL/TLS Encryption in TCP client, HTTP Client and MQTT modes
● Cloud support: MQTT via AWS IOT, Microsoft Azure, Thingsboard, Alibaba Cloud, EMQX, Tuya,Cumulocity IoT and so on

● High Reliability and Stability:EFT-IEC61000-4-4 Level 3(±2KV),Built-in hardware watchdog,ESD-IEC61000-4-2 Level 4 
● Redundant Power Supply
● Support TCP server/client, UDP server/client, https client, Virtual COM
● 4-port 485 Modbus Gateway (3-in-1 serial port RS232/RS485/RS422 Optional)
● Wide voltage input range DC 5-36V
● Flow control XON/XOFF
● Configuration via Web Server page, AT commands, and Windows Utility
Serial to Ethernet(Cost-effective)
USR-TCP232-302 1-port RS232 to Ethernet Converters
● Single RS232 to ethernet converters(transmission between RS232 and Ethernet)
● Cost effective serial port to Ethernet
● Transmission between RS232 port and Ethernet
● Power supply: DC 4.75-7V
● Compact, Small size, Light Weight
● Supports TCP server/client, UDP server/client
● Virtual COM
USR-TCP232-304 1-port RS485 to Ethernet Converters
● Single RS485 to ethernet converters(transmission between RS485 and Ethernet)
● Cost effective serial port to Ethernet
● Transmission between RS485 port and Ethernet
● Power supply: DC 4.75-7V
● Compact, Small size, Light Weight
● Supports TCP server/client, UDP server/client
● Virtual COM
USR-TCP232-306 1-port RS485/232/422 to Ethernet
●  RS232/485/422 Ports choose one of three
● Cost effective serial port to Ethernet
● Transmission between RS232/485/422 port and Ethernet
● Power supply: DC 4.75-7V
● Compact, Small size, Light Weight
● Supports TCP server/client, UDP server/client
● Virtual COM
Serial to WiFi
USR-W610 1 LAN Port Serial to WiFi Converter
● 802.11 b/g/n WiFi serial device server
● Modbus Gateway: Modbus RTU to Modbus TCP, Modbus Polling
● Supports TCP server/client, UDP server/client, HTTPD client
● Hardware WatchDog, 24 hours stable operation.
● 1-port RS232 or RS485 to wifi 
● Serial to WiFi / WiFi to Ethernet converters
USR-W630 2 LAN Port Serial to WiFi Converter
● 802.11 b/g/n WiFi serial device server
● Modbus Gateway: Modbus RTU to Modbus TCP, Modbus Polling
● Supports TCP server/client, UDP server/client, HTTPD client
● Hardware WatchDog, 24 hours stable operation.
● 1-port RS-232 or RS485 to wifi 
● Serial to WiFi / WiFi to Ethernet converters

USR-DR404 Din Rail RS485 to WiFi Converters
● 802.11 b/g/n WiFi serial device server
● Modbus Gateway: Modbus RTU to Modbus TCP
● Supports TCP server/client, UDP server/client,https client, Virtual COM
● TCP/UDP,HTTP, SMS,Modbus,MQTT
● Hardware WatchDog, 24 hours stable operation.
● 1-port RS485 to wifi 
● Serial to WiFi / WiFi to Ethernet converters
serial to ethernet(classic version)
USR-TCP232-410s RS232 and RS485 to Etherent Converter

● Serial Port: RS232 and RS485, can be used simultaneously
● Redundant Power supply: DC 5-36V or Terminal power supply
● Modbus Gateway: Modbus RTU to Modbus TCP, Modbus Polling
● Work mode: TCP Server/Client, UDP Server/Client, HTTPD Client
● Flow control XON/XOFF
● Serial to Web, 2 sockets
● Configuration by Webpage, AT command and Setup software



USR-N520 2 Ports Serial to Etherent Converter

● Serial Port: 2xports of RS232/RS485/RS422,can be used simultaneously

● Redundant Power supply: DC 5-36V or Terminal power supply

● Modbus Gateway: Modbus RTU to Modbus TCP, Modbus Polling

● Work mode: TCP Server/Client, UDP Server/Client, HTTPD Client

● Flow control XON/XOFF

● Serial to Web, 2 sockets

● Configuration by Webpage, AT command and Setup software


USR-N540 4 Ports Serial to Etherent Converter

● Serial Port: 4x ports of RS232/RS485/RS422,can be used simultaneously

● Redundant Power supply: DC 5-36V or Terminal power supply

● Modbus Gateway: Modbus RTU to Modbus TCP, Modbus Polling

● Work mode: TCP Server/Client, UDP Server/Client, HTTPD Client

● Flow control XON/XOFF

● Serial to Web, 2 sockets

● Configuration by Webpage, AT command and Setup software


USR-N510 1 Port Serial to Etherent Converter

● Serial Port: RS232/RS485/RS422,3-in-1 Serial ports

● Redundant Power supply: DC 5-36V or Terminal power supply

● Modbus Gateway: Modbus RTU to Modbus TCP, Modbus Polling

● Work mode: TCP Server/Client, UDP Server/Client, HTTPD Client

● Flow control XON/XOFF

● Serial to Web, 2 sockets

● Configuration by Webpage, AT command and Setup software

USR-N668 8-port RS232/422/485 Serial Device Servers
● Rack mounted, space saving
● Support 8 software selectable RS-232, RS-485/422 RJ45 serial port 
● Support linux OS
● Power supply accepts wide voltage input range AC 85-265V
● 2 Ethernet ports,switch function, cascade connection 
● SSL/TLS Encryption
● Configuration via Web Server page, AT commands, and Windows Utility
Solutions & Applications
Serial Device Server - Industrial Weighing Solution Traditional weighing scenes rely on manual recording, and at the later stage, use RS232/485 bus mode for data transmission. With the development of industrial automation, a single approach has been unable to continue to meet industrial weighing needs, mainly reflected in:
Production Line Data Collection Some large manufacturing industries need to collect data on production lines. By using a serial to Ethernet converter, the work efficiency can be greatly improved.
Don't hesitate to contact PUSR.
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