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

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.

Applications:

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

Features:

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

1 Year Warranty

This item is covered with a supplier warranty of 1 year from the time of delivery against manufacturing defects only. In case of manufacturing defects or issues, we will replace the part after warranty confirmation by our technical team, but we won’t offer refunds or replace the entire product.

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.