RS232/RS485 serial port to LTE wireless bidirectional transparent transmission 4G DTU

Short Description:

The terminal wiring structure design is more convenient for the industrial environment, supports script programming, realizes active data collection and has two-way transparent transmission.
MDDR3411 supports the national 2/3/4G network, provides one RS232/485 full transparent transmission interface, 2 switch inputs, 2 relay outputs, one 4V power output interface, built-in modbus RTU protocol, fully supports industrial configuration applications , Support TCP/UDP and other network communication protocols, this product has been widely used in many industrial remote measurement and control fields.

Product Detail

Product Tags

Quick Details
Model Number:
transparent transmission/relay control/acquisition
Brand Name:
Place of Origin:
Sichuan, China
Product name:
4G/LTE network DTU
Serial port interface:
Speed rate:
Working temperature:
-25℃ to +70℃
Relative humidity:
95% (No condensation)
SIM card interface:
Power supply interface:
VIN:5V~30V DC / BAT:3.5V~4.2V DC
Supply Ability
Supply Ability:
10000 Set/Sets per Month
Packaging & Delivery
Packaging Details
4G network DTU1 set/bag (with customized parts)
Lead Time :
Quantity(Sets) 1 – 100 >100
Est. Time(days) 7 To be negotiated

High cost performance and multifunction 4G DTU

Terminal connection structure design,more convenient for  industry applications,support script programing,also can automatically collect data from  instrument and bidirectional transparent transmission.


Hardware Description

Using ZTE communication chips, support 7 pattern 15 frequency brands 4G network, in case of 4G network instability, it can automatically switch to the 2/3G network to ensure that the equipment is constantly connected, and automatically switch to the 4G network when the 4G network is restored.

  • support multi data center, it can auto switch to standby data center when fault take place.
  • support TCP Client ,UDP Master pattern and TCP-ZSD, UDP-ZSD pattern that base on our packing.
  • that will become more easier while use the SDK provide by us to construct yourself data center.
  • support local , remote configure parameters and remote upgrade firmware.
  • support define register package , heart beat package ,header of data package by yourself,that will make data confirm become more convenient.
  • support industrial configuration application and OPC server and virtual serial port.
  • support most 4G network around the world. Using all terminal interface design and with RS232/RS485 serial port interface.
  • using 6~30V wide voltage range and watch dog design, ensuringwork stable at any kind of application scenarios.

Device parameters


Specification Description
VIN power supply interface Voltage range:5V~30V DC
BAT power supply interface Voltage range:3.5V ~4.2V DC
Power consumption @12VDC power;
Send and receive data current:150mA~240mA;
Idle status current:<40mA
Frequency brand GSM B3/8; CDMA1X CDMA EVDO;  WCDMAB1;
TD-SCDMA B34/39; LTE FDD B1/3;
LTE TDD B38/39/40/41;
(U)SIM card interface Support SIM card  3V/1.8V
Antenna interface 50Ω SMA interface
Serial port interface RS232/RS485/TTL; baud rate:300~115200bps
Data bit:7/8  parity check: N/E/O ;
Stop bit :1/2 bit
Temperature range Working temperature :-25℃~70℃
Storage temperature:-40℃~85℃
Humidity range Relative humidity:95%(No condensation)
Physical characteristic Long:10.5CM  wide:6cm  high:2.2cm,

Main Function Description

Support multiple protocol


Base on Mind packing  TCP/UDP pattern. The SKD package provide by us support multiple programming language development environment, user can easily visit data center without care about the complex network protocol . support static IP,dynamic domain,APN private network.

HTTP protocol

The HTTP protocol can be used as an HTTP client for data transmission and bidirectional communication with the HTTP server to simplify the development difficulty.

Using THE HTTP protocol, when the serial port has data to be sent, it establishes a connection with the server and submits the DTU ID and collected data packet to each HTTP server through HTTP post or HTTP get. In this way, the data collected by DTU can be directly displayed on the WEB side.

Virtual Serial Port Function

Using virtual serial port technology, it is possible to establish a high-speed 4G wireless connection between a serial port device and a host computer in the data center through DTU and make a virtual wired connection, which is compatible with the original serial port program of the user device.


Local/Remote Upgrade

support remote configuration parameters and upgrade firmware at monitor center,the device will work as usual when upgrading remotely.

Script programming overturns the traditional DTU, which only has the function of data transmission, and turns MDD3411 into a  DTU device with acquisition function.


Mind DTU local acquisition script instruction user manual

different from the DTU before, MDD3411 support script automatic acquisition function. Using script instruction, users can define the data acquisition flexibly, greatly reduces hardware costs.

Defining the local acquisition action flexible

The custom script can realize the automatic acquisition of external sensor and instrument data by DTU without the need for the user to add controller separately.DTU timing automatic acquisition can be realized through the script instruction to configure DTU, which greatly reduces the acquisition hardware cost.The script realizes the basic functions of switch control, delay control, instruction issuing, circulation control, reporting control, inserting custom message header, and whether to accept the change of baud rate of instrument response, etc., which can meet the acquisition requirements of most instruments.

MDD3411 adopts advanced patch technology

With port overcurrent, overvoltage, anti-reverse connection and anti-surge protection, industrial-grade quality, stable operation at -40~85℃;If the wire connection is unexpectedly reversed and the port is short-circuited, the device will not be damaged, and it can be used normally after reconnecting.



Company Information


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