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 https://elecena.pl/product/23210204/dual-channel-rs485-expansion-hat-for-raspberry-pi 2023-04-13 https://elecena.pl/product/23210204/dual-channel-rs485-expansion-hat-for-raspberry-pi 2023-12-27 https://elecena.pl/product/23210204/dual-channel-rs485-expansion-hat-for-raspberry-pi 2024-04-12 https://elecena.pl/product/23210204/dual-channel-rs485-expansion-hat-for-raspberry-pi 2024-09-18 https://elecena.pl/product/23210204/dual-channel-rs485-expansion-hat-for-raspberry-pi 2024-11-29 https://elecena.pl/product/23210204/dual-channel-rs485-expansion-hat-for-raspberry-pi 2024-11-30 https://elecena.pl/product/23210204/dual-channel-rs485-expansion-hat-for-raspberry-pi 2025-02-13 https://elecena.pl/product/23210204/dual-channel-rs485-expansion-hat-for-raspberry-pi 2025-04-10 https://elecena.pl/product/23210204/dual-channel-rs485-expansion-hat-for-raspberry-pi 2025-08-05 https://elecena.pl/product/23210204/dual-channel-rs485-expansion-hat-for-raspberry-pi 2025-11-28 https://elecena.pl/product/23210204/dual-channel-rs485-expansion-hat-for-raspberry-pi 2025-11-29