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.
UART Expansion Chip: SC16IS752
RS485 Transceiver: SP3485
Communication Interface: SPI
Data Rate: 300 ~ 921600 bps
Operating Voltage: 3.3V / 5V
Dimensions: 65 × 56.5mm
Mounting Hole Size: 3.0mm
SC16IS752 UART expansion chip
ADUM1412 digital isolator
SP3485 RS485 transceiver
B0505LS power supply isolation module
RT9193-33 power chip
SMAJ12CA transient suppress diode array
PWR: power indicator
RXD/TXD: UART transceiving indicator
Raspberry Pi GPIO connector: for connecting Raspberry Pi
MCU control header: for connecting host control boards like Arduino
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