Item Tag: 2-CH RS485 HAT

This auction is for 2-CH RS485 HAT 2-Channel Isolated RS485 Expansion HAT for Raspberry Pi, SC16IS752+SP3485 Solution, with Multi Onboard Protection Circuits 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, lightning-proof & 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 like Arduino Comes 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 What's on Board SC16IS752 UART expansion chip ADUM1412 digital isolator PC817 optocoupler SP3485 RS485 transceiver B0505LS power supply isolation module RT9193-33 power chip SMAJ12CA transient suppress diode array Auto-recovery fuse Status indicator PWR: power indicator RXD/TXD: UART transceiving indicator Raspberry Pi GPIO connector: for connecting Raspberry Pi RS485 terminal MCU control header: for connecting host control boards like Arduino 120Ω terminal resistor switch Interrupt pin switch Operating mode selection Half-auto: A=0, B=1 Full-auto: A=1, B=0 Example Pinouts PIN Raspberry Pi (BCM) Description VCC 5V 3.3V/5V power supply GND GND Ground SCK P21 (SPI1 SCLK) SPI clock input MOSI P20 (SPI1 MOSI) SPI data input MISO P19 (SPI1 MISO) SPI data output CS P18 (SPI1 CS) SPI chip select IRQ P24 Interrupt output EN1 P27 Channel 1 TX/RX enable: high for TX, low for RX EN2 P22 Channel 2 TX/RX enable: high for TX, low for RX Dimension Development Resources Wiki : www.waveshare.com/wiki/2-CH_RS485_HAT Package Contains 2-CH RS485 HAT x1 2x20PIN female pinheader x1 RPi screws pack (2pcs) x1