Based on 40PIN GPIO interface design, suitable for series motherboard With one CAN, using the controller MCP2515 with CAN transceiver solution, can achieve SPI to CAN With two RS485 channels, using SC16IS752 and SP3485 dual-chip solution, can achieve SPI to RS485 On-board power conversion circuit, support 8-28V wide voltage power supply, can supply power to at the same time On-board integrated power supply isolation, can provide stable isolation voltage, isolation side without additional power supply. size: 65 x 56.5MM Material: PCB colour: blue Package Contents: 1 x RS485 CAN HAT (B) 1 x 2x20PIN long row header 1 x Screw package Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.