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USB Relay Control Module

Getting Started

Last revision 2025/12/05

How To Use

Here, with a USB cable, you will learn how to use DRI0291.It's very easy, let's get start.

Device list

Hardware device list

  1. RLY-8 Relay Controller-USB x1
  2. USB-B cable x1
  3. 7.5V power adapter x1

Software list

  1. Computer software
  2. USB virtual serial driver

Connection Diagram

first_DRU.png

Device Instructions

  1. Install the USB virtual serial driver.
    install_driver1.png
    install_driver2.png
    install_driver3.png
  2. Open “Enternet_Com_Relay.exe” PC software, and select the right Serial port ID and Baud rate (Default:1200).
    portsetting.png
  3. Open the serial port and input relay address (Default: 0x11). Click “Read the relay status”.
    readstate.png
  4. Click “Open” and “Close” to control relay.
    state_OF8.png

Change Device Address

  1. Input old address (Default: 0x11) or broadcast address(0xAB).
    change_add1.png
  2. Input new address(0x11~0x7F) in the blank, and click “Set address”.
    change_add2.png

Change Device Baud rate

Select right baud rate and click “Set baud rate”(Default:1200).
change_tate.png

Factory Reset

There is a reset button on the device, please hold it for 2 seconds, until the Led begin flashing, it will back to the default setting. And you could connect it with the default baud rate and address.

Documents

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