RS485 CAN Shield

Raspberry pi RS485 & Can Shield

Raspberry pi RS485 & Can Shield - Front

Raspberry pi RS485 & Can Shield - Back

Overview

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.

Features

Compatible with Raspberry Pi 4 Model B/3B+/3B/2B/Zero/Zero W.
Only a small amount of GPIO are used and the rest pins allow to work for other expansion function. please refer to RS485 CAN Shield#GPIO MAP
Power supply and signal isolation, Build-in surge and ESD protection.
CAN function, onboard CAN controller MCP2515 via SPI interface, onboard high speed CAN transceiver, onboard digital isolation ADUM1201BRZ, Communication Rates 20Kbps-1Mpbs can be programmed arbitrarily.
RS485 function, controlled via UART, half-duplex communication, supports automatic TX/RX control without programming, onboard SPI to RS485 SC16IS1752. Electrical data isolation ADM2483.
On board individual 120 Ohm terminal resistance, Impedance matching and guarantee the ability to drive.

GPIO MAP

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

Output Interface

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

RS485 CAN Shield

Contents

Overview

Features

GPIO MAP

Output Interface

Packing List

Document