This is a 6-ch Relay Module for Raspberry Pi Zero with RS485/CAN. It features embedded protection circuits such as power isolation, Photocoupler Isolation, and TVS diode, etc.

Hardware Analysis Industrial Modbus RTU 6-ch Relay Module

Features:

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

Package Includes:

1 x ABS protection enclosure (top and bottom)

1 x RPi Zero Relay

1 x Screwdriver

1 x 12V 1A power adapter (OPTIONS)

1 x Screws pack