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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.
| PIN No | PIN of Rpi | Usage |
|---|---|---|
| PIN18 | GPIO_24 | RS485 Interrupt |
| PIN19 | GPIO_10 | SPI0 MOSI |
| PIN21 | GPIO_9 | SPI0 MISO |
| PIN22 | GPIO_25 | CAN Interrupt |
| PIN23 | GPIO_11 | SPI0 SCLK |
| PIN24 | GPIO_8 | RS485 Transfer Chip Selection |
| PIN26 | GPIO_7 | CAN Transfer Chip Selection |
| 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 |