Waveshare 2-Channel RS485 HAT, Isolated RS485 Expansion Board, Compatible with Raspberry Pi 4B/3B+/3B etc

• This board adopts SC16IS752+SP3485 dual chip combination, converts SPI to RS485, data rate up to 921600bps, with embedded protection circuits such as power supply isolation, ADI magnetical isolation, and TVS diode, etc.
• With Standard Pi 40PIN GPIO extension header, supports Raspberry Pi series boards. Breakout SPI control pins, for being for host control boards.
• It allows transceiving data manually or automatically, configured by DIP switch. Onboard TVS (Transient Voltage Suppressor), effectively suppress surge voltage and transient spike voltage in the circuit, llghtningproof & anti-electrostatic.
• Onboard auto-recovery fuse and protection diodes, ensures the current/voltage stable outputs, provides over-current/over-voltage proof, improves shock resistance. Onboard LEDs for indicating the power and transceiver status.
• Due to its fast communication, stability, reliability, and safety, it's an ideal choice for fields like industrial automation. Provide online development resources and manual (examples in C and Python).

Overview This is a 2-channel isolated RS485 expansion HAT designed for Raspberry Pi, adopts the SC16IS752+SP3485 solution, with embedded protection circuits such as power supply isolation, ADI magnetical isolation, and TVS diode, etc. It is easy to control the 2-channel RS485 for auto transceiving via SPI interface. Due to its fast communication, stability, reliability, and safety, it is an ideal choice for fields like industrial automation. Features Standard Raspberry Pi 40PIN GPIO extension header, supports Raspberry Pi series boards Adopts SC16IS752+SP3485 dual chip combination, converts SPI to RS485, data rate up to 921600bps Allows transceiving data manually or automatically, configured by DIP switch Onboard TVS (Transient Voltage Suppressor), effectively suppress surge voltage and transient spike voltage in the circuit, lllghtningproof & anti-electrostatic Onboard auto-recovery fuse and protection diodes, ensures the current/voltage stable outputs, provides over-current/over-voltage proof, improves shock resistance Onboard LEDs for indicating the power and transceiver status Breakout SPI control pins, for connecting with host control boards with development resources and manual (examples in C and Python) Specifications UART expansion chip: SC16IS752 RS485 transceiver: SP3485 Communication interface: SPI Data rate: 300 ~ 921600 bps Operating voltage: 3.3V/5V Dimensions: 65mm × 56.5mm Mounting hole size: 3.0mm User Manual waveshare.com/wiki/2-CH_RS485_HAT?amazon