In large-scale photovoltaic power stations, there are usually multiple inverters that generate a large amount of data, such as output voltage, current, power, frequency, and operating status (normal, fault, standby, etc.). This data needs to be accurately and timely collected and transmitted to the monitoring system so that staff can monitor the operating status of the inverters in real-time, detect faults promptly, and perform maintenance to ensure the efficient operation of the photovoltaic power station. Traditional RS485 communication networks mostly operate in a one-master-multiple-slave mode. However, in some complex application scenarios, two master devices need to simultaneously collect data from and control the inverters. For example, in a large-scale distributed photovoltaic power station, there may be both a local monitoring center and a remote monitoring center. The local monitoring center needs to obtain real-time inverter data for on-site operation and maintenance management, while the remote monitoring center needs to aggregate and analyze the operational data of the entire power station for remote dispatching. In such cases, the two-master-one-slave RS485 bus splitter emerges as a solution.
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