2-Channel Isolated RS485 Expansion HAT for Raspberry Pi

This is a 2-channel isolated RS485 expansion HAT designed for Raspberry Pi, adopting the SC16IS752+SP3485 solution, with embedded protection circuits such as power supply isolation, ADI magnetic 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.

• Standard Raspberry Pi 40-pin GPIO extension header
• 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, lightningproof & anti-electrostatic
• Onboard resettable fuse and protection diodes, ensures the current/voltage stable outputs, provides over-current/over-voltage proof, improves shock proof performance
• Onboard LEDs for indicating the power and transceiver status
• Breakout SPI control pins, for connecting with host control boards like Arduino
• Comes with online 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: 65.0 × 56.5mm
• Mounting hole size: 3.0mm