Intelligent PV combiner box monitoring is essential for ensuring safe, efficient, and stable operation in photovoltaic power systems. This case demonstrates how OpenPLC and ARMxy controllers are used to implement reliable monitoring functions with high accuracy and flexibility.
ARMxy Industrial Controller
Y-Series High-Speed Counter Module (for current and voltage data acquisition)
X-Series DO Module (for controlling protection and switching components)
The Y-Series high-speed counter module collects real-time electrical data from each PV string, providing accurate current and voltage information for system monitoring.
OpenPLC executes the monitoring logic, evaluating the collected data and determining system status based on preset conditions and thresholds.
The X-Series DO module controls 24V DC protective devices and switching components inside the PV combiner box, enabling timely responses to abnormal conditions.
Users can modify monitoring parameters, alarm thresholds, and control logic remotely in real time, improving the adaptability of the system.
The modular design and OpenPLC’s open-source architecture make integration simple and support future functional expansion.
This solution improves monitoring efficiency while maintaining scalability, ensuring it can adapt to different PV layouts and varying power generation capacities.
