CAN interface has been a very popular serial communication standard in the industry due to its excellent prioritisation and arbitration capabilities. In systems with different voltage domains, isolation is typically used to protect the low voltage side from the high voltage side in case of any faults.
Isolation also breaks any ground loops allowing only the desired signals to be transmitted, thereby improving signal quality. Isolated CAN is used for communication with the microcontroller in a wide range of applications such as solar inverters, circuit breakers, motor drives, PLC communication modules, telecom rectifiers, elevators, HVACs and EV charging infrastructures.
Isolated CAN can be broadly categorised into two types:
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