The LOGR | Solar Data Logger is a versatile data logging solution, purpose-built for solar resource assessment and monitoring on utility-scale PV plants.
| LOGR-SOLAR (#9432) | |
|---|---|
| Description | |
| Instrument type | High utility data logger and real-time sensor interface |
| Applications | Solar resource monitoring and solar resource assessment |
| Data Collection | |
| Sampling interval | 1 Hz (IEC 61724-1 compliant) |
| Averaging interval | 1-minute (IEC 61724-1 compliant) |
| Real time clock | Internal battery-backed with time synchronization |
| Storage medium | 8 GB microSD |
| Maximum data storage | 90 days at 1 second and 365 days at 1 minute intervals |
| Channel Capacity |
• Fourteen (14) analog channels (single-ended); Seven (7) differential • Twenty-four (24) serial channels via two (2) RS-485 communication ports • Two (2) PV Input channels (soiling measurement) • Ten (10) calculated channels plus dedicated soiling ratio calculation • Five (5) counter channels (two with sensor excitation) • Three (3) outputs to control 12 V loads or relays |
| Counter Channels Sensor Compatibility |
Compatible with a wide array of industry-standard anemometers, tipping bucket rain gauges, and other accumulator sensors (Refer to user manual for a complete list of supported sensors) |
| Analog Channels Sensor Compatibility |
Compatible with a wide array of sensors including, NRG meteorological sensor suite and pyranometers (Refer to user manual for a complete list of supported sensors) |
| Analog Measurement Accuracy |
Uncertainty (k=2):
|
| RS-485 Channels Sensor Compatibility |
Supports configurable Modbus RTU data acquisition. (Contact NRG to discuss support for additional model types or protocols) |
| Parameters recorded for each channel |
• Average • Standard deviation • Minimum/Maximum 1-sec sample • 3-second Wind gust Note: Statistics reported on each channel are dependent on measurement type |
| Data delivery |
• Real-time data delivery via Modbus registers (TCP via Ethernet or RTU via RS-485) • Scheduled delivery of historical data via FTP • On-demand transfer of historical data via internal web server to FTP |
| Security | Password-protected web server access |
| Resolution | |
| Analog measurement resolution | 24-bit signed A/D conversion |
| Software | |
| Type |
• Onboard web server for logger configuration and administration • Modbus Demo Client to test configured unit prior to connecting to SCADA |
| Configuration | |
| User interface |
• Web-based user interface via Ethernet connected computing device with web browser (such as Google Chrome) • Recessed reset button on front panel • Audible beeper for user feedback |
| Connections | |
| Sensor wiring |
Integrated wiring panel featuring removable terminal blocks: • Seven (7) dedicated analog sensor wiring ports • Four (4) dedicated RS-485 sensor wiring ports • Two (2) dedicated PV input ports • Five (5) Counter input ports • Three (3) Output ports • Enclosure ground lug connects to earth ground with included ground cable |
| Communication ports |
• Ethernet port for web browser, FTP, Modbus TCP (server) • RS-485 port for Modbus RTU (server) |
| Power requirements | |
| Batteries | Coin cell battery for clock backup |
| External power input | 16 to 28 V DC |
| External solar input | Contact NRG sales for accompanying backup power supply system options |
| External power output |
• Constant 12 V source for powering analog sensors (50 mA per excitation port, 7 ports) • Constant 12 V source for powering modbus sensors (1000 mA shared by three COM-A ports and additional 1000mA to COM-B port) • Three (3) outputs to control external devices, 12 V DC (500 mA each, 1000 mA total maximum current) |
| Installation | |
| Mounting | 35 mm DIN Rail |
| Tools required |
• Screwdriver for wiring input terminals (included) • Ethernet connected computing device with web browser (such as Google Chrome) |
| Environmental | |
| Operating temperature range | -40 °C to 65 °C (-40 °F to 149 °F) |
| Operating humidity range |
• 0 to 100% relative humidity non-condensing • IP65 ingress protection with proper installation in NRG shelter box enclosure |
| Physical | |
| Dimensions | (190.5 x 101.6 x 101.6) mm |
| Materials | |
| Enclosure | Formed aluminum enclosure |
| Shipping | |
| Shipping weight | 0.91 kg (includes grounding wire and sensor plug set) |
NRG Systems • 110 Riggs Road • Hinesburg, Vermont 05461 • +1 802-482-2255 • info@nrgsystems.com