LORDWORLD 2-Channel Isolated RS485 Expansion HAT development board

2-Channel Isolated RS485 HAT for Raspberry Pi

This expansion HAT adds two isolated RS485 ports to Raspberry Pi boards via the standard 40-pin GPIO header. It uses an SC16IS752 and SP3485 chip combination to convert SPI signals to RS485 at up to 921600bps. Onboard TVS diodes, an auto-recovery fuse and protection diodes guard against surges and over-current events. Status LEDs show power and transceiver activity, and development resources include C and Python examples.

Suits Pi projects needing dual RS485 links

Makers building Modbus networks, industrial sensor arrays or long-distance serial buses will benefit from the dual channels and hardware isolation. The board also breaks out SPI control pins for Arduino compatibility. Buyers who need more than two RS485 channels or a different physical interface should look at other expansion options.

SPI-to-RS485 conversion up to 921600bps

The SC16IS752+SP3485 solution handles the protocol translation and sets the maximum data rate. A DIP switch selects manual or automatic transceiver control for each channel. This speed ceiling is the key figure to verify against your bus timing requirements before purchase.