The LOGR-S Data Logger is an advanced data logging system that is purpose-built for solar resource monitoring on operational utility-scale PV plants.
| PV (#9431) | |
|---|---|
| Description | |
| Instrument type | High utility data logger and real-time sensor interface |
| Applications | Solar resource monitoring |
| 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 (all data with maximum configuration) |
| 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 • Counter channel support coming soon |
| Analog Channels Sensor Compatibility |
Compatible with a wide array of sensors including: • Standard analog sensors including NRG meteorological sensor suite (T60 Temperature, BP60 Barometric Pressure, RH5X Relative Humidity, etc.) • Industry-standard pyranometers (Hukseflux SRxx series, EKO MS-xx series, Kipp & Zonen CMP series, etc.) • 10K NTC Thermistor and RTD (PT100, PT1000) type temperature 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 Note: Statistics reported on each channel 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 Google Chrome browser • 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 • Enclosure ground lug connects to earth ground with included ground cable |
| Expansion slots |
Available module slots include: • MCU (processor) module • Analog module • PV input module • Counter module (coming soon) |
| 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) VDC |
| 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) |
| Installation | |
| Mounting | 35 mm DIN Rail |
| Tools required |
• Screwdriver for wiring input terminals (included) • LAN-connected computing device with Google Chrome web browser |
| 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 |
NRG Systems • 110 Riggs Road • Hinesburg, Vermont 05461 • +1 802-482-2255 • info@nrgsystems.com