RS485 CAN Shield
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Overview
RS485&CAN Shield is an industrial communication module for Raspberry Pi, there are on board 2*RS485 Bus and 1*CAN Bus communication interface via SPI interface.
CAN bus and RS485 bus powered through separated isolation power module, signal between the transceiver and the controller is isolated , ESD protection for the communication port, ensure your raspberry pi can be used in more strictly industrial scene.
Features
- Compatible with Raspberry Pi 4 Model B/3B+/3B/2B/Zero/Zero W.
- Only a small amount of GPIO are used and the rest pins allow to work for other expansion function. please refer to RS485 CAN Shield#GPIO MAP
- Power supply and signal isolation, Build-in surge and ESD protection.
- CAN function, onboard CAN controller MCP2515 via SPI interface, onboard high speed CAN transceiver, onboard digital isolation ADUM1201BRZ, Communication Rates 20Kbps-1Mpbs can be programmed arbitrarily.
- RS485 function, controlled via UART, half-duplex communication, supports automatic TX/RX control without programming, onboard SPI to RS485 SC16IS1752. Electrical data isolation ADM2483.
- On board individual 120 Ohm terminal resistance, Impedance matching and guarantee the ability to drive.
GPIO MAP
| PIN No | PIN of Rpi | Usage |
|---|---|---|
| PIN19 | GPIO_10 | SPI0 MOSI |
| PIN21 | GPIO_9 | SPI0 MISO |
| PIN23 | GPIO_11 | SPI0 SCLK |
| PIN24 | GPIO_8 | RS485 Transfer Chip Selection |
| PIN26 | GPIO_7 | CAN Transfer Chip Selection |
| PIN18 | GPIO_24 | RS485 Interrupt |
| PIN22 | GPIO_25 | CAN Interrupt |
Output Interface
| No. | Function | Description |
|---|---|---|
| 1 | RS485_A1 | RS485-1 A Single |
| 2 | GND_485 | RS485-1 Isolated GND |
| 3 | RS485_B1 | RS485-1 B Single |
| 4 | RS485_A2 | RS485-2 A Single |
| 5 | GND_ISO | RS485-2 Isolated GND |
| 6 | RS485_B2 | RS485-2 B Single |
| 7 | CANH | CAN-H |
| 8 | CAN_GND_ISO | CAN Isolated GND |
| 9 | CANL | CAN-L S |
Packing List
- 1 x shield
- F/M Spacer 2.5*16+6 x 4 pieces
- Screw 2.5*6 x 4 pieces
Document
- Software Download: RS485 CAN HAT Download
- Support mail: support@inno-maker.com
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