Communication circuit between monitoring module and rectifier module

The communication circuit between the monitoring module and the rectifier module is as shown in the figure. Optocouplers N9 and N452 provide isolation between the microprocessor D211 and the rectifier module. N9 isolates the transmit buffers V15 and V10. The transmit buffers V15 and V10 are designed to provide the driving capability for communication of 100 rectifier modules. N452 is A high-gain optocoupler buffer is used to receive the signal sent from the rectifier module.