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Din-Rail Modem USR-DR502-E


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Cost-effective DIN-Rail 4G LTE Cat 1 Modem


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Din-Rail Modem USR-DR502-E Introduction

Din-Rail Modem USR-DR502-E is a DIN-Rail series, including Serial to Ethernet converters, 4G LTE Cat 1 modem and 4G industrial routers. Their built-in 35 mm DIN rail seat applies to all DIN-Rail installation scenarios.

Features of Din-Rail Modem USR-DR502-E

  • 9-36V wide power supply range.
  • LTE Cat 1 & GSM with sim card slot.
  • Transparent transmission and AT command mode.
  • SMS, NET, Serial AT command configuration.
  • FTP Upgrade and FOTA self-upgrade.
  • Socket Distribution Protocol.

Basic Functions

Support the RS485 serial port, and easily deliver the data transparently between RS485 and 4G LTE Cat 1 network in bi-direction.

  • Operation Mode
    • Support the four sockets connection, TCP client and user datagram protocol (UDP).
    • Support the customized heartbeat package and registration package functions.
  • HTTPD Mode
    • Support the submission of serial data to the designated server in HTTP (GET/POST) mode.
  • Parameter Configuration
    • Support the parameter configuration of serial, network and SMS commands, and provide the configuration tool for the PC.
  • FOTA Remote Upgrade
    • With the remote management platform, it can realize the automatic firmware upgrade The upgrade package of difference algorithm is small, and the upgrade traffic and time are saved.
  • Hardware Protection
    • Level-3 ESD protection, level-3 surge protection, and built-in hardware watchdog.


  • Data Collection of Distribution Boxes.
  • By virtue of its small size and DIN-Rail installation, USR-DR502 can be installed in a low voltage distribution box to save space. With extremely fast response speed, 4G DTU device can timely send data to the control platform.
SKU: Modem USR-DR502-E Categories: , , ,
Models USR-DR502-E
LTE Category LTE Cat.1
Frequency Bands LTE FDD B1/B3/B7/B8/B20/B28
Transmission Speed LTE FDD Rel.13 10MbpsDL/5Mbps UL
GPRS 85.6KbpsDL/85.6Kbps UL
TX Power FDD:B1/3/7/8/20/28 23dBm±2dB
GSM:900MHz 33dBm±2dB
GSM:1800MHz 30dBm±2dB
Rx Sensitivity GSM:900MHz -109.5dBm
GSM:1800MHz -108dBm
FDD:B1/3/20 -98dBm
FDD:B7 -97.5dBm
FDD:B8/B28 -98.5dBm
Serial Parameters NO. RS485(Terminal)*1
Data Bits 8
Stop Bits 1,2
Baud Rate 1200~230400
Physical Interfaces SIM/USIM card 1.8V/3V(with slot)
Antenna SMA Female
Reload Button
Reset /
Hardware Characteristics Input Voltage 9V~36V
Connector Terminal
Housing material ABS Plastic
Dimensions(mm) 44.5×31.8×13.94
Operating temperature -30℃~+75℃
Storage Temperature -40℃~85℃
Operating humidity 5%~95%
Storage humidity 5%~95%
Software Protocol TCP/UDP/IPV4/IPV6/ /DNS/HTTP/MQTT
RNDIS Default Close
Serial to network 4 sockets, default A
Command mode 6 Sockets
Configuration Serial, Net, SMS AT commands
Cache 20 packets
Packaging mechanism Packaging time(ms) 10~500,default50
Packaging length(byte) 5~65535,defalut1024

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