DR（Din-Rail）series products are our
newly launched devices which include
serial device server, 4G cellular modem,
4G industrial router and other product
models. Equipped with 35mm din-rail clasp,
this products are more suitable for
device connecting internet.

Based on wifi network:USR-DR404

Product Detail

PC + ABS material, light and easy to carry,
low cost, high performance,
V0 class flame retardant rating,
to ensure the safety

Din-rail Installation

Compact size, less space, wide application,
Guide buckle, flexible and easy to install,
less management and maintenance,
high cost performance.

Fundamental Function

Bidirectional Transparent transmission
between RS485 and Wi-Fi / Ethernet

Function Structure

Work Mode

Transparent Transmission Mode

Data is transmitted transparently between
serial port and Wi-Fi / Ethernet via DR404,
enabling data transfer between serial port
device and network device

Serial Command Mode

The user sends data to the server according to
the protocol and can send data to
different servers without restarting.

HTTPD Client Mode

After the user completes the https header with
an AT instruction or web page setup, DR404
can pass data to or from the https server.

AT Command Mode

Users can query the current status of DR404
or set relevant parameters by sending
AT instructions

Features

Modbus Gateways

Mode of transferring data between Modbus TCP
and Modbus RTU.

Socket Distribution

In transparent transmission mode,
the serial device can send data to
the specified Socket connection.
Network data for each Socket are sent
to the serial device via
the serial port.

Quick Networking Protocol
USR-LINK

Mobile phone connect to the AP of DR404,
you can directly set the specified AP
to which DR404 connects by querying
surrounding AP’s SSID list through
USR-LINK, which is convenient and fast.
You can quickly connect to the Internet
without operating DR404.

Custom Registration Package,
Heartbeat Package

The registry package is used for easy device
identification from the server.

Hardware Protection

ESD 4 level Electrostatic Discharge Immunity,
3 level Surge Immunity, EFT 3 level
Electrical Fast Transient/Burst Immunity.

Packing list

Packing list one serial device server and
Wi-Fi antenna, if you need power adapter,
contact our sales.

Application Case

Smart Factory Data Collection and Transmission

DR404 is connected to the serial port device in
the factory, and the device operation data is
uploaded to the local monitoring platform or
USR cloud platform in real time. Through the
monitoring platform, the staff can dynamically
understand the operation of the monitored equipment.

Textile Machinery Factory Data Acquisition and Transmission

Compact size, less space, Equipped with DIN-rail
for easy mounted, The terminal data of the PLC
can be quickly uploaded to the monitoring platform,
so that the staff can understand the PLC work
in real time.