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    DTU Data Transfer Unit, Modbus RS485

    5 out of 5 based on 1 reviews | Write a review
    Data transfer unit (DTU) is a remote data control product. Wireless acquisition function supports Modbus RTU protocol, communication interface is RS-485, transmission distance is 8km. DTU has switch value follow and control acquisition functions. It supports 2-channel isolation switch inputs and 2-channel relay outputs.
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    Delivery date: 6-12 days


    • Supports 2-channel switch value input and 2-channel relay output. Modbus RTU protocol data processing.
    • Use 433MHz frequency for wireless data remote transmission.
    • 4 working modes: wireless control acquisition mode, wireless follow-up transmission mode, wireless follow-up reception mode, and configuration mode. Select by DIP switch.
    • RESET touch reset button. Press and hold for 5s in wireless control acquisition mode, the Modbus address is restored to the default address 01.
    • Built-in efficient watchdog with high reliability and stability.
    • Power supply has good functions of preventing over-current, over-voltage, and reverse connection.

    Note: Before purchasing, please confirm that the frequency band used by the device complies with local laws and regulations.


    Model ATO-E820-DTU (2I2-433L) ATO-E830-DTU (2R2-433L)
    Acquisition Range 4-20mA Switch Value/Digital Value
    Acquisition Channels 2-channel 2-channel
    Transmission Distance 8km 8km
    RF Specifications
    Standard Frequency 433MHz 426MHz
    TX Power 1W 1W
    Hardware Specifications
    Operation Temperature -20℃~+70℃ -40℃~+70℃
    Storage Temperature -40℃~+85℃ -40℃~+85℃
    Operation Humidity 5%~95% 
    Storage Humidity 1%~95% 
    Operation Voltage 8V~28V 
    Current Collecting Range 0mA~20mA -
    Current Output Range 0mA~20mA -
    Relay Output - 5A 30VDC/5A 250VAC
    Accuracy 0.2%
    Data Interface RS485: 9600bps
    Size (H*W*D) 120mm*105mm*25mm
    Certification CE, CCC
    Soft Specifications
     Operation Mode Following TX, Following RX, Controlling/Collecting, Configuration
     Configuration Command Modbus RTU
    PDFDownload Attachments E820-DTU User Manual

    Dimension and Interface Description (Unit: mm)

    Installation Dimension of Data Transfer Unit Model E820

    Installation Dimension of Data Transfer Unit Model E830

    Interface Dimension of Dimension Drawing of Data Transfer Unit Model 2I2/2R2

    Tips: What is data transfer unit (DTU) ?

    Data transfer unit (DTU) is a wireless terminal device, it is used to convert serial data into IP data or convert IP data into serial data. It is transmitted through wireless communication network. DTU is widely used in industry, meteorology, hydrology and water conservancy, geology and other industries.

    Data transfer unit hardware components mainly include CPU control module, wireless communication module and power module. Its advantages include rapid and flexible networking, short construction period, low cost, wide network coverage, good security and confidentiality performance, link support always online and low user cost, etc.

    Existing reviews of DTU Data Transfer Unit, Modbus RS485
    Affordable DTU data transfer unit
    If I want to purchase multiple Modbus RS485DTU data transfer units, do you have a discount?
    From: Loblaw | Date: 16/03/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Yes, we can provide discounts for customers who purchase multiple Modbus RS485DTU data transfer units.
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