DFRobot Dual-channel RS485 Expansion Hat for Raspberry Pi 4B


In stock

SKU: 1551166
  1. Operating Voltage: 3.3V
  2. RS485 Transceiver: TP75176E
  3. Serial Chip: CH432T
  4. RS485 Communication Interface ×2
  5. Raspberry Pi 3B+/4B Supported
  6. Mounting Hole Size: diameter 2.5mm

 2,510.00 (Incl. GST)

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Brand: DF Robot
Category: Raspberry Pi Hats
Tags: AI hat for Raspberry PI, DFRobot

RS485 is a common serial communication standard with features such as good noise rejection, long transmission distance, and multi-drop capability. It transmits data using a differential transmission method, which allows it to suppress common-mode interference. RS485 requires a pair of twisted-pair cables and two terminal resistors to eliminate signal reflection during long-distance communication.

This dual-channel RS485 expansion HAT designed for the Raspberry Pi adopts an isolated transceiver to achieve isolation for RS485, which increases the reliability and anti-interference of data transmission in each channel. And it features embedded protection circuits such as a lightning and surge protector, a TVS diode, and power supply isolation to protect the Raspberry Pi development board effectively.

Besides, the order includes a screw accessory kit that allows users to tightly fix this board onto a Raspberry Pi controller.

  1. Agricultural Internet of Things
  2. Warehouse Internet of Things
  3. Indoor and Outdoor Environmental Monitoring
  4. Lighting Control
  5. Security Access Control System


  1. Dual Channel RS485
  2. Electrical & signal isolation
  3. Lightning & surge protection
  4. Transient voltage suppressor
  5. RX/TX data transmitting/receiving indicator

Package Includes:

1 x RS485 Expansion HAT for Raspberry Pi
4 x Copper Column & Screw

SKU: 1551166 Category: Tags: ,
Operating Voltage


RS485 Transceiver


Serial Chip


RS485 Communication Interface


Power Indicator


TX Communication Indicator


RX Communication Indicator


120Ω Terminal Resistance


Wiring Method

5.08-3P pluggable terminal block

Supported device

Raspberry Pi 3B+/4B

Mounting Hole Size

diameter 2.5mm

Dimension(Package Not Included)


Shipping Weight 0.052 kg
Shipping Dimensions 11 × 9 × 3 cm
6 Months Warranty

This item is covered with a supplier warranty of 6 months from the time of delivery against manufacturing defects only. This is a quality product from the original manufacturer. Only manufacturing defects are covered under this warranty. Replacement will be done against manufacturing defects.

What voids the warranty:

If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.

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Country Of Origin: China