1. Based on Raspberry Pi40P|NGPO interface design, suitable for series motherboards . 2. With one channel of CAN, the solution of using the controller MCP2515 with CAN transceiver can realize SP|to CAN 3. Equipped with two-way , using SC16S752 and SP3485 dual-chip combination scheme, which can realize SP|to RS485 4. Onboard power conversion circuit, supports 8-28v wide voltage power supply, and can supply power to at the same time. 5. On-board integrated power isolation can provide stable isolation voltage, and no additional power supply is required for the isolation terminal 6. On-board integrated digital isolation, which can perform signal isolation, high reliability, strong anti-interference, low power consumption 7. On-board (transient voltage suppressor), which can effectively suppress the surge voltage and transient voltage in the circuit, anti-static 8. Onboard self-recovery fuse and protection diode can stable output of current and voltage, prevent overcurrent and overvoltage, and improve impact resistance 9. On-board 120ohm terminal resistor, which can be enabled by setting the jumper cap 10. There are two wiring methods, on-board terminals and pin headers, making wiring more convenient 11. Lead out the SP control interface for easy access to other controllers Expansion interface: 2-way RS485+1-way CAN Communication interface: SPI CAN controller: MCP2515 CAN Transceiver: SIT65HVD230DR or SN65HVD23D CAN communication rate: within 1Mbps Serial expansion chip: SC16IS752 RS485 transceiver: SP3485 Rs485 communication rate: 300-921600bps Power supply mode: external power supply terminal or External power supply range: DC 8-28V Working voltage: 3.3V Product size: 65x56.5mm Colour:blue Material:ABS Package Contents: 1 x RS485 CAN HAT (B) Expansion Board 1 x 2 x 20Pin long row seat 1 x screw pack 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.