Waveshare Raspberry 4B Isolated RS485 CAN Expansion Board Module Multi Onboard Protection Circuits

Waveshare Raspberry 4B Isolated RS485 CAN Expansion Board Module Multi Onboard  Protection Circuits

Features:
- Based on Raspberry Pi 40PIN GPIO interface design, suitable for Raspberry Pi series motherboards.
- 1 CAN, using the controller MCP2515, with CAN transceiver, can realize SPI to CAN.
- Equipped with two channels of RS485, using SC16IS752 and SP3485 dual-chip combination scheme, can realize SPI to RS485.
- On-board power conversion circuit, support 8~28V wide voltage power supply, can supply power to Raspberry Pi at the same time.
- On-board integrated power isolation, which can provide stable isolation voltage, and no additional power supply is required at the isolation end.
- On-board integrated digital isolation for signal isolation, high reliability, strong anti-interference, and low power consumption.
- On-board TVS (transient voltage suppression tube), which can effectively suppress surge voltage and transient peak voltage in the circuit, lightning protection and anti-static.
- On-board resettable fuses and protection diodes ensure stable output of current and voltage, prevent over-current and over-voltage, and improve shock resistance.
- On-board 120Ω termination resistor, enabled by jumper cap settings.
- There are two wiring methods of on-board terminals and pin headers, making wiring more convenient.
- Lead out SPI control interface for easy access to other controllers for control.

Specification:
- Expansion interface: 2 RS485 + 1 CAN
- Communication interface: SPI
- CAN Controller: MCP2515
- CAN transceiver: SIT65HVD230DR or SN65HVD23D
- CAN communication rate: within 1Mbps
- Serial port expansion chip: SC16IS752
- RS485 Transceiver: SP3485
- RS485 communication rate: 300~921600 bps
- Power supply mode: external power supply terminal or Raspberry Pi
- External power supply range: DC 8~28V
- Working voltage: 3.3V
- Product size: 65 × 56.5 mm

Package Included:
- 1 x RS485 CAN HAT (B)
- 1 x (2 x 20)PIN
- 1 x Screw Pack