RS485/CAN bus, power supply isolation & photocoupler isolation

Features at a glance

RS485 half-duplex communication: using SP3485, UART control, auto RX/TX switch
CAN half-duplex communication: using MCP2515 + SN65HVD230 solution, SPI control
Onboard unibody power supply isolation, provides stable isolated voltage, needs no extra power supply for the isolated terminal
Onboard photocoupler isolation, prevent interference from external high-voltage circuit connected to the relay
Onboard TVS (Transient Voltage Suppressor), effectively suppress surge voltage and transient spike voltage in the circuit, lightningproof & anti-electrostatic
Onboard resettable fuses and protection diodes, ensuring current/voltage stable output, preventing over current/voltage, better shock proof performance
High quality relay, contact rating: ≤10A 250V AC or ≤10A 30V DC
ABS protection enclosure with rail-mount support, easy to install, safe to use
Comes with development resources and manual (wiringPi and python examples)

Specifications

Operating voltage	7V~36V (industrial input voltage compatible)	Relay channel	6 ch
Communication protocol	RS485, CAN	Contact form	1NO 1NC

Tailored for Raspberry Pi Zero series

suitable for Raspberry Pi Zero with pre-soldered pinheader

Enclosure design

ABS protection enclosure with rail-mount support, easy to install, safe to use

What’s On Board

MCP2515
CAN controller
SI8642ED-B-IS
digital isolator
SN65HVD230
CAN transceiver
SP3485EN
RS485 transceiver
LM2596 voltage regulator
providing stable 5V voltage
Photocoupler isolation
prevent interference from external high-voltage circuit connected to the relay
6-channel quality relays
contact rating per channel: ≤10A 250V AC or ≤10A 30V DC
Power supply isolation
provides stable isolated voltage, needs no extra power supply for the isolated terminal

Resettable fuses
TVS diodes
Relay and power indicators
40PIN GPIO header
suitable for Raspberry Pi Zero with pre-soldered pinheader
Relay screw terminals
for connecting with user devices
Power supply screw terminals
RS485 bus interface
CAN bus interface
RS485 120Ω terminal resistor switch
CAN 120Ω terminal resistor switch
Relay control pins
External power supply jack
Thickened tracks
allows large current devices