Your query posted successfully. We will get back to you soon.
, ,

Din Rail RS485 to WiFi Converters USR-DR404


2 in stock (can be backordered)

Din Rail RS485 to WiFi Converters | RS485 to 802.11 a/b/g/n WLAN Serial Device Servers


incl. GST

Availability: 2 in stock (can be backordered)

2 in stock (can be backordered)

Special price on bulk order

Secure Payment

Fast & Quick Delivery

Technical Support


Din Rail RS485 to WiFi Converters USR-DR404 Introduction

Din Rail RS485 to WiFi Converters USR-DR404 is a Din Rail RS485 to WiFi converter which can realizes bidirectional transparent transmission between RS485 and WiFi / Ethernet. PC + ABS material, light and easy to carry, low cost, high performance, V0 class flame retardant rating, to ensure the safety

  • 1-port RS485 to 802.11 a/b/g/n WLAN Serial Device Server.
  • Links serial and Ethernet devices to an IEEE 802.11a/b/g/n network.
  • Supports TCP server/client, UDP server/client, https client, Virtual COM.
  • Supports Modbus RTU to Modbus TCP.
  • Supports multiple networking mode with 1 RJ45 ethernet port.
  • MQTT special firmware.

Din Rail RS485 to WiFi Converters USR-DR404 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.

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.
  • httpsD 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.

Hardware Protection

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


  • Smart Factory Data Collection and Transmission
  • Textile Machinery Factory Data Acquisition and Transmission


SKU: Converters USR-DR404 Categories: , ,


Port Number 1 Ethernet Ports: 1 x WAN/LAN
Buffer RX/TX: Max 4K bytes
Protection 2KV Electromagnetic isolation for Ethernet port
Speed Rate 10/100Mbps, MDI/MDIX


Certificate FCC/CE
WiFi 802.11 b/g/n
Frequency Range 2.412GHz-2.484GHz
Transmit Power 802.11b: +19dBm(Max.@11Mbps)

802.11g: +18dBm(Max.@54Mbps)

802.11n: +17dBm(Max.@HT20,MCS7)


User can configure power
Receive Sensitivity 802.11b: -89dBm(@11Mbps)

802.11g: -81dBm(@54Mbps)

802.11n: -73dBm(@HT20,MCS7)



Interface Standard RS485:300~230.4Kbps
485 interface (anti surge, anti thunder, overcurrent protection)
Input Voltage DC5~36V
Operating Temp -40℃~85℃
Storage Temp -40℃~125℃
Size 109.66*28*64.71mm(L*W*H)


Network Mode Station/AP/AP + Station
Encryption TKIP/AES
Work Mode Transparent transmission/Serial command/

https Client/Modbus TCP<=>Modbus RTU

Setting Command AT+ command
Networking Protocol TCP/UDP/ARP/ICMP/DHCP/DNS/https
Max Client Number in TCP Server Mode 24
Configuration Web server +AT command
Customer application software Support customize application software

Leave a Reply

Your email address will not be published. Required fields are marked *

Bulk Enquiry





This will close in 0 seconds