Basic Function

Realize bidirectional transparent transmission 
between RS232 and Ethernet

DIN-rail mounting

Small size, easy to manage and maintain, cost-effective

Function Diagram

Working mode

Serial to Ethernet converter USR-DR301 will initiate TCP connection to the destination IP address
that configured by the user and serial to Ethernet converter will continuously try to reconnect
if establishing TCP connection unsuccessfully.

Serial to Ethernet converter USR-DR301 monitors the set port and waits 
for a TCP client connection. Data from the serial device will transmit 
to all successfully-connected via serial to Ethernet converter.

USR-DR301 only communicates with the target interface of the target IP, 
thus to assure the accuracy of data transmission.

DR301 can transmit the data automatically to the last time transferred 
device after receiving the data, which is suitable for multi-network
devices that need to communicate with the DR301.

DR301 supports the function of transmitting the serial data to the
specified server in the form of HTTPD (GET/POST).

Support Modbus gateway

More functions

Virtual serial software

Solve the problem of PC software 
as a serial port can not communicate 
with networking device.

Network Heartbeat Packet

Serial server maintains the normal 
connection with the server by sending
heartbeat packet regularly.

Identity Heartbeat Packet

When 301 works as TCP Client, it can send identity packet
packet to TCP server which can be identification.
Identity packet can be IMEI code, ICCID code 
and user editable identity packet.

USRIOT Cloud

USR-DR301 can realize the bidirectional transparent
transmission between the server and terminal device
through USRIOT Cloud quickly.

Product details

PC+ABSC material, portable, low cost, V0 flame retardant, 
ensure the safety of the product.

Power data networking transmission

Small size which is available for narrow space;
DIN-rail mounting, easy to install on the wall;
The terminal data of the distribution box can quickly convert into the network data, 
real-time communication, reduce the cost effectively.

Unattended Weighing

Connect serial to ethernet converter USR-DR301 to barrier gate and it can realize remote control
of barrier gate by Ethernet in control center.