2 serial port, RS232 RS485 RS422 three-in-one.Device Server with Modbus; | Realize transparent transmission between TCP/UDP data package and RS232/RS485/RS422 interface; | Voltage range of 5~36V DC, Modbus RTU to Modbus TCP, CTS/RTS, XON/XOFF. | Support Modbus multi-host polling, support Modbus RTU to Modbus TCP, DHCP and DNS. | Support Built-in Webpage, Httpd Client and Websocket and network printing and watchdog mechanism.

USR-N540, Four serial ports device server,RS232 / RS485 / RS422 interface,TI cortex-M4 solution, ARM processor and TCP/IP protocol stack,DNS, DHCP, Websocket and HTTPD Client supported | Built-in webpage, support customized,Reload button,one key to restore factory defaults,Multiple indicator LEDs for easy debugging,Keepalive function,rapidly detect dead links | 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

Support DHCP/DNS | Support built-in webpage | Upgrade firmware via network | Supports RS232/RS485/RS422 port ( Can’t be used at one time) | Work mode: TCP Server, TCP Client, UDP Client, UDP Server, HTTPD Client Baud rate of serial port can be configured from 600 bps to 230.4 Kbps

USR-DR301 is a tiny size RS232 to Ethernet converter, which can realize the bidirectional transparent transmission between RS232 and Ethernet. | Realize bidirectional transparent transmission between RS232 and Ethernet?Support Modbus gateway | DIN-rail mounting: Small size, easy to manage and maintain, cost-effective | Virtual serial software: Solve the problem of PC software as a serial port can not communicate with networking device. | USRIOT Cloud: USR-DR301 can realize the bidirectional transparent transmission between the server and terminal device through USRIOT Cloud quickly.

Ethernet 10/100Mbps, support Auto-MDI/MDIX | Support TCP Server, TCP Client, UDP, UDP Server, Httpd Client work modes | Provide PC TCP/IP socket programming examples such as VB, Andriod, IOS etc. | Support upgrade firmware via network | Serial work as RS232/RS485/RS422, DB9 female, provide RS485/RS422 converter

USR-TCP232-ED2 Triple Serial Device Server, UART TTL to Ethernet/TCPIP Module Converter, Support D2D Forwarding | Auto-MIDX function, discretionarily connect cross-over or direct network cable, automatic switching | Support TCP Server, TCP Client, UDP, UDP Server, HTTPD Client,websocket, various of ethernet protocols | Support virtual serial port, provide corresponding software | Support DHCP, automatically access IP, can inquire the facility within network through the UDP broadcast protocol(using software USR-TCP232-E45 Setup)