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LOGR-S is NRG Systems’ first data logger designed specifically for the solar energy industry. Based on decades of data logger development and manufacturing experience, LOGR-S features the same user-friendliness that has come to define NRG’s data logger line, while satisfying the increasing demand for reliable, high-quality solar resource measurements on operating PV plants.
LOGR-S integrates seamlessly with NRG’s Solar Resource Monitoring (SRM) System, allowing users to plug into their plant’s SCADA network with ease. LOGR-S’ modular design can also be adjusted to accommodate a project’s unique measurement requirements. Additionally, LOGR-S features:
- compatibility with the most commonly used SRM sensors
- high-resolution, high-accuracy analog measurements
- built-in and optional PV input module for soiling measurements
- configurable serial measurement capability for data acquisition from digital sensors
- integrated communications capabilities
- storage capacity for historical real-time data
- automated delivery of historical data
LOGR-S is supported by our expert Technical Services team who can assist our global customers via in-the-field and remote trainings, installation assistance, and more.
PV (#9431) |
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DESCRIPTION |
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| Instrument type | High utility data logger and real-time sensor interface |
| Applications | Solar resource monitoring |
DATA COLLECTION |
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| 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):
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| Mounting | 35 mm DIN Rail |
| Tools required | • Screwdriver for wiring input terminals (included) • LAN-connected computing device with Google Chrome web browser |
ENVIRONMENTAL |
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| 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 |
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| Dimensions | (190.5 x 101.6 x 101.6) mm |
MATERIALS |
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| Enclosure | Formed aluminum enclosure |
- High-utility data logger and real-time sensor interface for solar resource monitoring
- Purpose-built, modular platform delivers straightforward functionality
- Flexible and scalable design accommodates each project's unique requirements
- Accurate and reliable data collection for critical measurements
- Increased efficiency when installing and integrating environmental sensors into SCADA systems
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