Adopts MCP2515 and SN65HVD230 dual chips combined solution, allows 2-channel CAN communication. Integrated power isolation, providing stable isolated voltage, requires no extra power supply for the isolated terminal; Onboard digital isolator, signal isolation makes the communication more safe, more stable, and better anti-interference. Onboard TVS (Transient Voltage Suppressor) diode, provides ESD protection and transient peak voltage protection; Onboard voltage translator, select 3.3V /5V operating voltage by jumper.; Onboard 120 terminal resistor, configured by jumper; Breakout SPI control pins, for connecting with host control boards like STM32/Arduino