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