SKU: 17221
Part Number: 2-CH RS485 HAT
Brand: Waveshare
Korisne informacije:
www.waveshare.com/wiki/2-CH_RS485_HAT 2-Channel Isolated RS485 Expansion HAT For Raspberry Pi, SC16IS752+SP3485 Solution, With Multi Onboard Protection Circuits
2-Channel Isolated RS485 HAT For Raspberry Pi 2-Ch RS485, SPI communication
Bulit-In Power Supply Isolation, Magnetical Isolation, And TVS Diode, Etc.
Features At A Glance 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, 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.
- 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, lightningproof & anti-electrostatic
- Onboard resettable fuse and protection diodes, ensures the current/voltage stable outputs, provides over-current/over-voltage proof, and improves shock proof performance
- Onboard LEDs for indicating the power and transceiver status
- Breakout SPI control pins, for connecting with host control boards like Arduino
- Comes with online 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 |
65.0 × 56.5mm |
MOUNTING HOLE SIZE |
3.0mm |
Connect To Raspberry Pi Series Boards Standard Raspberry Pi 40PIN GPIO Header, Customized For Raspberry Pi Series Boards
What's On Board 
- SC16IS752
UART expansion chip
- π142M61
digital isolator
- PC817
optocoupler
- SP3485
RS485 transceiver
- B0505LS
power supply isolation module
- RT9193-33
power chip
- SMAJ12CA
transient suppress diode array
- Resettable fuse
- Status indicator
PWR: power indicator
RXD/TXD: UART transceiving indicator
- Raspberry Pi GPIO header
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
Pin Definition 
Product Show 
Outline Dimensions 
- PACKAGE CONTENT
Weight: 0.029 kg
- 2-CH RS485 HAT x1
- 2x20PIN female pinheader x1
- RPi screws pack (2pcs) x1
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