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