The Waveshare’s Isolated RS485 RS232 Expansion HAT is an isolated RS485 and RS232 expansion board specially designed for Raspberry Pi. It adopts SC16IS752+SP3485, SP3232 scheme, built-in power isolation, ADI magnetic coupling isolation and TVS and other protection circuits. The board features TVS (Transient Voltage Suppressor) and a resettable fuse, which can effectively suppress surge voltage and transient spike voltage in the circuit, improve shock resistance.
Features

Based on Raspberry Pi 40pin GPIO interface, suitable for Raspberry Pi series motherboards

Using SC16IS752 and SP3485, SP3232 multi-chip combination scheme, can realize SPI to

RS485, RS232, the communication rate is up to 921600bps

RS485 supports manual or automatic sending and receiving of data, which can be set by DIP switch

RS485 onboard resettable fuse and protection diode can ensure stable output of current and voltage, prevent overcurrent and overvoltage, and improve shock resistance

Onboard TVS (transient voltage suppression tube), which can effectively suppress the surge voltage and transient peak voltage in the circuit, and protect against lightning and static electricity.

Onboard power supply and serial port transceiver indicators, easy to check the module power supply and communication status

Lead out the SPI control interface for easy access to main control boards such as Arduino

Provide complete supporting information manuals (C and python sample programs and user manuals, etc.)

Package Contents

RS485 RS232 HAT x1
2X20PIN header x1
Standoffs pack (2pcs) x1

Resources
WIKI:RS485_RS232_HAT
Isolated RS485 RS232 HAT For Pi
Comes with development resources and manual

Standard Raspberry Pi 40PIN GPIO Header
Suitable For Raspberry Pi Series Boards

RS485 And RS232 Support
RS232: Full-Duplex Communication, SP3232 TransceiverRS485: Semi/Full-Automatic Communication, SP3485 Transceiver

Overcurrent/Overvoltage Proof, High Stability!
Onboard TVS (Transient Voltage Suppressor) And Resettable Fuse, Can Effectively Suppress Surge Voltage And Transient Spike Voltage In The Circuit, Improve Shock Resistance

Interface Definition

What’s On Board

Outline Dimensions