Dual-channel RS485 Expansion HAT for Raspberry Pi

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.

Connection Example – RS485 Expansion HAT and Laser Ranging Sensor

Features

• Dual Channel RS485
• Electrical & signal isolation
• Lightning & surge protection
• Transient voltage suppressor
• RX/TX data transmitting/receiving indicator

Specifications

• Operating Voltage: 3.3V
• RS485 Transceiver: TP75176E
• Serial Chip: CH432T
• RS485 Communication Interface ×2
• Power Indicator: red
• TX Communication Indicator: blue
• RX Communication Indicator: green
• 120Ω Terminal Resistance: ×2
• Wiring Method: 5.08-3P pluggable terminal block
• Raspberry Pi 3B+/4B Supported
• Mounting Hole Size: diameter 2.5mm
• Dimension (Package Not Included): 56×65mm

Resources

• Product wiki
• Schematics
• Design Document
• Model File
• CAD File
• TP75176E Datasheet

Package Contents

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