Isolated RS232 / RS485 / CAN / CAN FD Expansion Board for Raspberry Pi 4 & 5

The RS232/RS485 CAN Board is an industrial communication expansion board for the Raspberry Pi 4B and Raspberry Pi 5 that has multiple communication connections: 2x RS485, 1x RS232, 1x CAN FD, and 1x CAN. Each connection is electrically isolated, providing secure communication for industrial areas. The board includes protections like lightning resistance and anti-electrostatic, making it handy for trickier conditions. Coming in an industrial rail-mount case, it makes installation a piece of cake and it is used in control systems. The case provides decent space to stack other HATs or expansion boards, and it includes reserved space for a PCIe adapter board for the Raspberry Pi 5, giving flexibility for future upgrades and expansions. Features

* Based on Raspberry Pi 40-Pin GPIO header, suitable for Raspberry Pi 4B and Raspberry Pi 5

* SC16IS752 and SP485 combination scheme, expands SPI to 2x RS485 interface

* MCP2515 and SN65HVD230 combination scheme, expands SPI to 1x CAN interface

* MCP2518FD and MCP2562FD combination scheme, expands SPI to 1x CAN FD interface

* Raspberry UART and SP3232EEN combination scheme, expands UART to 1x RS232 interface

* TVS (Transient Voltage Suppressor), effectively suppress surge voltage and transient spike voltage in the circuit, lightning proof & ESD protection

* Self-recovery fuse and protection diodes, provide current/voltage stable outputs, over-current/over-voltage proof and improve shockproof performance

* Unibody power supply isolation, needs no extra power supply for the isolated terminal, provides stable current/voltage outputs of RS232, RS485, CAN, and CAN FD interfaces, and improves the anti-interference and anti-shock performance

* Digital isolation chip for safer signal isolation communication and better stability and anti-interference performance

* External power supply screw terminal for 7~36V wide voltage power input, combines with Pi5 Connector Adapter (B) to power the Raspberry Pi and the expansion board at the same time

* 120Ω terminal resistor, configured by jumper

* Reserved interrupt resistor pad for flexible switching the interrupt pin if there is pin conflict when working with other HATs

* Comes with online development resources and manual (examples for Raspberry Pi Python/C)

Specifications

Applicable Board Raspberry Pi 4B, Raspberry Pi 5

Communication Interface SPI + UART

Extended Industrial Connections Connections Chip Scheme Baudrate

1-ch isolated CAN FD MCP2518FD + MCP2562FD 5kbps ~ 8 Mbps

1-ch isolated CAN MCP2515 + SN65HVD230 5kbps ~ 1 Mbps

2-ch isolated RS485 SC16IS752 + SP485 300 bps ~ 921600 bps

1-ch isolated RS232 SP3232EEN

Power Supply Methods 5V Type-C power port of Pi5 Connector Adapter (B)

External screw terminal for DC 7-36V wide voltage input

Dimensions L x W x H: 154.6 x 83.7 x 59 mm

Connection Example - Raspberry Pi 5 & PCle Board

Note: Raspberry Pi 5 and PCIe board are NOT included Resources

* Product Wiki

* Schematic

Pinout

Package Contents

* 1x RS232 RS485 CAN Board (with ABS plastic case)

* 1x 40-Pin cable

* 1x Pi5 Connector Adapter (B)

* 1x Screws pack