Monitoring module functions: Data Acquisition + Alarm + Communication (Source: Synode); Key Standard: Real-time string monitoring with ±0.5% accuracy (Source: Synode); Core Interface: RS485 MODBUS (Source: Acrel); Note: Hall-effect isolated measurement (Source: Acrel).
I. Data Acquisition
Current: Hall-effect acquisition for 24 string currents (Source: Acrel);
Voltage: Busbar voltage up to DC 1500V (Source: Acrel); Power: Power per string and total power (Source: SANDI); Accuracy: Class 0.5 (±0.5%) (Source: Acrel); Range: DC 0–20A per channel (Source: Acrel)—Acquisition: Current + Voltage + Power (three data points).
II. Temperature Measurement
Enclosure Temp: Measurement of internal enclosure temperature (Source: Acrel);
Real-time: Real-time temperature monitoring (Source: Made-in-China); Display: Digital temperature display (Source: Songshuo); Overtemperature: Overtemperature warning and protection (Source: fonrich); Outdoor Use: Suitable for wide-temperature outdoor environments (Source: Made-in-China)—Temperature: Enclosure Temp + Real-time Monitoring + Overtemperature Protection (three functions).
III. Status Monitoring
Lightning Protection: Surge protective device (SPD) status monitoring (Source: Songshuo); Circuit Break: Circuit breaker status acquisition (Source: Acrel); DI: 3-channel digital input (Source: Acrel); Switch: SPD main switch status (Source: SANDI); Relay: Relay contact output (Source: Acrel)—Status: Lightning protection + Circuit break + Switch (Three monitoring functions).
IV.
Alarm Functions
Fault: Automatic fault detection and alarm (Source: Synode); Location: Local fault localization (Source: Songshuo); Output: Alarm output contact (Source: fonrich); Arc Detection: DC arc fault detection (Source: fonrich); Shutdown: Automatic shutdown protection (Source: fonrich)—Alarm: Fault + Location + Shutdown (Three capabilities).
V.
Communication Functions
RS485: RS485 isolated interface (Source: SANDI); Protocol: MODBUS-RTU protocol (Source: Acrel); Platform: SCADA cloud platform (Source: Synode); Infrared: Infrared data interface for debugging (Source: SANDI); Expansion: Irradiance and wind speed sensor interface (Source: Acrel)—Communication: RS485 + MODBUS + Expansion (Three channels).
VI. Display and Power Supply
LCD: LCD screen (Source: Acrel); Digital: Digital display of string current (Source: Songshuo); Power Supply: DC 1000V/1500V self-powered (Source: Acrel); DIN Rail: 35mm DIN rail mounting (Source: Acrel); Wiring: Safe feed-through wiring (Source: Made-in-China)—Display: LCD + Digital + Self-powered (three key features).
VII.
Procurement Recommendations
First, evaluate data acquisition (string-level current and voltage); second, check alarm functions (fault localization); third, verify communication capabilities (RS485); fourth, confirm accuracy (Class 0.5);
fifth, select the power supply (1500V self-powered)—Monitoring Module: Acquisition + Alarm + Communication (three core functions).
