2-Channel Isolated RS485 Expansion HAT for Raspberry Pi
2-Channel Isolated RS485 Expansion HAT for Raspberry Pi
2-Channel Isolated RS485 Expansion HAT For Raspberry Pi, SC16IS752+SP3485 Solution, With Multi Onboard Protection Circuits
Bulit-In Power Supply Isolation, Magnetical Isolation, And TVS Diode, Etc.
Features:
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
