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Product description: UART - RS485 Converter TP8485E - 5 V / 12 V - Shield for Seeed Xiao and QT Py - Seeedstudio 113991354
RS485 is a reliable serial communication standard that is widely used in industry and systems requiring long-distance data transmission. Seeedstudio expansion module designed to work with Seeed Xiao and Adafruit QT Py boards, enabling conversion of UART stream to RS485 signal . The module works as a half-duplex transceiver , which means that it supports unidirectional transmission at a given time. Thanks to 5V or 12V power supply and easy connection via 3-pin screw connectors , it is extremely versatile and easy to integrate. It also has a 120R switch , which allows termination of the RS485 bus, which is important for correct transmission in long-distance environments.
UART - RS485 converter TP8485E - 5 V / 12 V - shield for Seeed Xiao and QT Py - Seeedstudio 113991354.
The converter works with 5 V and 12 V power supplies.
Main features of the module
- RS485 communication support : UART to RS485 conversion by TP8485E
- Long transmission range : communication distance up to 1200 meters
- Wide supply voltage range : can operate at 5 V or 12 V
- Two screw terminals : separate terminals for RS485 signals and power supply
- 120R Termination Switch : allows you to adjust the resistance at the ends of the bus
- 5V Input/Output Mode : Selectable between input and output mode for power supply
- Compact size : equivalent to the size of two Xiao boards, making it easy to integrate
Pins on the board
The module has several important pins and switches that allow it to be properly configured:
- Power inputs:
- 5V - standard voltage for most devices
- 12V - optional power supply for more demanding applications
- RS485 signal connectors:
- RS485_A - first RS485 differential wire
- RS485_B - second RS485 differential wire
- GND - signal ground
- Configuration switches:
- 5V OUT/IN Switch - allows you to set the power supply as input or output
- 120R Switch - allows you to add a 120 Ω terminating resistor
Pinout description.
The converter allows you to transmit the signal at a distance of up to 1200 m.
Connection and programming
Connecting the module is intuitive - just connect the RS485_A and RS485_B signals to the RS485 bus and provide the appropriate power supply (5 V or 12 V). If the module is used on a long communication line, it is worth activating the 120R switch to ensure proper impedance matching of the bus. The module works with Arduino IDE and MicroPython , which allows for its easy configuration and programming. Thanks to this, the module can be easily used in applications such as industrial automation, monitoring systems and data acquisition.
Technical specifications of the converter
- Communication interface: RS485
- Communication system: TP8485E (half-duplex transceiver)
- Screw connectors: 3-pin for RS485 signal, 3-pin for power supply
- Transmission distance: up to 1200 m
- Transmission speed: up to 250 kb/s
- Supply voltage: 5 V or 12 V DC
- Compatibility: Seeed Xiao, Adafruit QT Py
- Dimensions: approx. 42 x 35 mm
Contents of the set
- 1x Converter UART - RS485 TP8485E - 5V / 12V - Shield for Seeed Xiao and QT Py - Seeedstudio 113991354
The board is fully compatible with Seeed Xiao and Adafruit QT Py.
