Isolated RS485 RS232 Expansion HAT for Raspberry Pi, SPI Control

PACKAGE CONTENT

Weight: 0.033 kg

1. RS485 RS232 HAT x1
2. 2X20PIN header x1
3. Standoffs pack (2pcs) x1

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Isolated RS485 RS232 Expansion HAT For Raspberry Pi, SPI Control, Onboard Protection Circuits

Isolated RS485 RS232 HAT For Pi

Comes with development resources and manual

Features At A Glance

• Standard Raspberry Pi 40PIN GPIO extension header, supports Raspberry Pi series boards
• Adopts the combination scheme of SC16IS752, SP3485 and SP3232, converts SPI to one RS485 and one RS232
• Onboard resettable fuse and protection diodes, ensure the stable output of RS485 current and voltage, prevent over-current and over-voltage, improve shock resistance
• Onboard TVS (Transient Voltage Suppressor), can effectively suppress surge voltage and transient spike voltage in the circuit, lightningproof & anti-electrostatic
• Breakout SPI control pins, for connecting with Arduino and other host control boards
• Comes with development resources and manual (examples in C and Python)

Specifications

Standard Raspberry Pi 40PIN GPIO Header

Suitable For Raspberry Pi Series Boards

RS485 And RS232 Support

RS232: Full-Duplex Communication, SP3232 Transceiver
RS485: Semi/Full-Automatic Communication, SP3485 Transceiver

Overcurrent/Overvoltage Proof, High Stability!

Onboard TVS (Transient Voltage Suppressor) And Resettable Fuse, Can Effectively Suppress Surge Voltage And Transient Spike Voltage In The Circuit, Improve Shock Resistance

Interface Definition

What's On Board

1. Raspberry Pi GPIO interface
   for connecting to the Raspberry Pi Board
2. MCU control interface
   for connecting to other host boards such as Arduino
3. RS485 interface
4. RS232 interface (DB9 male)
5. SC16IS752 UART chip
6. SP3485 RS485 Transceiver
7. SP3232 RS232 Transceiver
8. π142 Digital Isolator chip
9. PC817 Optocoupler Isolation
10. B0505LS Power Isolation Module

11. RT9193-33 power chip
12. TVS (Transient Voltage Suppressor)
13. Resettable Fuse
14. Status Indicator
    PWR: Power indicator
    RXD/TXD: UART transceiving indicator
15. RS485 120Ω terminal resistor on/off
16. Interrupt pin switching
    Use D24 pin by default, can be changed to D16/D12/D25 pin by re-soldering the position of 0Ω resistor
17. RS485 operating mode selection
    Semi-automatic: A=1, B=0
    Full-automatic: A=0, B=1

Outline Dimensions

Resources & Services

WIKI: RS485_RS232_HAT