Product Description
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
- 120? terminal resistor switch
- Interrupt pin switch
-
Operating mode selection Half-auto: A=0, B=1 Full-auto: A=1, B=0
Lieferumfang
- 2-CH RS485 HAT x1
- 2x20PIN female pinheader x1
- RPi screws pack(2pcs) x1
