RS485 GSM GPRS Modem, RS485 to GPRS

Communication Expert of Industrial IOT
RS485 GSM GPRS Modem, RS485 to GPRS
RS485 GSM GPRS Modem, RS485 to GPRS
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Price: $35.00
Availability: In Stock
Model: USR-GPRS232-734
Manufacturer: USR IOT
Average Rating: Not Rated

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Unique Features

1.Support GSM850/900 DCS1800/1900

2.Support Httpd Client

3.Support GSM/GPRS and 2G/3G/4G card, but don't support 3G/4G network

4.Support SMS transmission mode, network transmission mode and HTTPD mode


This is a RS485 to gprs modem,used for data transparent transmission. USR-GPRS232-734 GPRS DTU (Data Transfer unit) is a wireless terminal equipment which can convert serial data to IP data or convert IP data to serial data through gprs network. Clients can use this product to realize bidirectional transparent transmission from serial port to network through simple AT command.


  • Each connection support 4KB data cache, when in abnormal connection choosing data cache to avoid data lost
  • Support sending registration package and heartbeat package data
  • Support remote configuration via SMS
  • Support basic instruction set and extension instruction set
  • Support establishing, maintaining and closing network connection by using extension instruction set, more flexibility in application
  • Support sending Chinese/English SMS via simple instructions, avoiding PDU sending Chinese SMS which complex and hard use
  • Support class RFC2217,can modify module serial parameter via network dynamically
  • Support wide voltage 5~36V power supply, using DC power supply and terminal power supply
  • RS485 circuit using electrical isolation scheme, has anti-interference ability



Wireless Parameter
Wireless Standard GSM/GPRS/EDGE
Standard Frequency Band 850/900/1800/1900MHz
Transmitted Power GSM900 class4 (2W)
DCS1800 class1 (1W)
GPRS Terminal Device Class Class B
GPRS Multi-slot Class GPRS Class 10
GPRS Coding Schemes CS1 ~ CS4
Antenna Option SMA interface
Hardware Parameter
Data Interface RS485 level, 5.08*3 terminals
Baud Rate 2400bps - 921600bps
Working Voltage DC 5V~36V
Working Current 59mA ~ 65mA (12V)
Operating Temp. -25 - 85 degree
Storage Temp. -40 - 125 degree
Size 82.5 * 86.0 * 24.0 mm
RS485 reliability Electrical Isolation
ESD air 15KV
Surge 4KV (8/20us)


Function Diagram

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