Raspberry Pi RS485 RS232 Isolated Expansion HAT SPI control

Raspberry Pi RS485 RS232 Isolated Expansion HAT SPI control

$24.89

Brand：Spotpear

SKU：0102112

Date：2022-02-18 15:01

Part Number：

RS485-RS232-HAT

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Raspberry Pi RS485 RS232 Isolated Expansion HAT SPI control

Raspberry Pi RS485 RS232 HAT

Features At A Glance

Standard Raspberry Pi 40PIN GPIO extension header, supports Raspberry Pi series boards
Using the combination scheme of SC16IS752, SP3485 and SP3232, one RS485 and one RS232 can be extended through the SPI interface
On-board resettable fuse and protection diode can ensure the stable output of RS485 current and voltage, prevent overcurrent and overvoltage, and improve shock resistance
On-board 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.
Reserve SPI control interface, which is convenient for main control boards such as Arduino
Comes with development resources and manual (examples for Raspberry Pi/Arduino)

Product parameters

Serial port expansion chip: SC16IS752
Communication interface: SPI
RS485 transceiver: SP3485
RS232 transceiver: SP3232
Serial communication rate: up to 921600bps
Working voltage: 5V
Diameter of positioning hole: 3.0mm
Product size: 65mm × 56.5mm

Based on Raspberry Pi 40pin GPIO interface

Suitable for Raspberry Pi series motherboards

Support RS485 and RS232 interface

RS232 function: full duplex communication, the transceiver is SP3232
RS485 function: semi/automatic communication, transceiver is SP3485

Anti-overcurrent and anti-overvoltage

On-board TVS (transient voltage suppression tube) and resettable fuse can effectively suppress the surge voltage and transient peak voltage in the circuit, and improve the shock resistance

Interface definition

What's On Board

Raspberry Pi GPIO interface
Easy access to the Raspberry Pi board
MCU control interface
Easy access to main control boards such as Arduino
RS485 interface
RS232 interface (DB9 male)
SC16IS752 Extended serial port chip
SP3485 RS485 Transceiver
SP3232 RS232 Transceiver
π142 digital isolator chip

PC817 optocoupler isolation
B0505LS Power Isolation Module
RT9193-33 power chip
TVS Diode Array
Resettable fuse
Status Indicator
PWR: Power indicator
RXD/TXD: serial port transceiver indicator
RS485 120Ω termination resistance switch
Can be connected to CR2032 coin cell battery
Interrupt pin switching
Default D24 pin, can be changed to D16/D12/D25 pin by soldering 0 ohm resistor
RS485 working mode switch
Semi-automatic: A=1, B=0
Fully automatic: A=0, B=1