User's Manual

This product is a field control bus with multiple communication protocols in one or A
central control device for communication between a universal digital controller and an
extender module,It is used in digital scenarios such as building automation and
industrial air conditioning security.
Parameters:1.Supply voltage: 5V DC
2.
RS485 bus voltage: 12v DC
3. Working temperature: -20°C - 60°C
4. Humidity: 5% - 95%
Key functions:
A: Function selection button
B: Communication mode toggle button
C: 1.14 inch lcd screen
D: Type C interface
E: SD card slot
F: RS485 interface
G: RS485 communication protocol switch
Operation Process:
1. Select the appropriate communication mode (SD card data reading mode, RS485
communication or serial communication) to insert the SD card or access the RS485 data line.
2. Connect the Type C data cable to power on.
3. Press the key B to switch the communication mode.
4. Press key A to select the required function.