Sargon RD22
Distributed Data Acquisition System for wide-area telemetry with GPS timing for sychronized data logging
The RD22 is a Distributed Data Acquisition System for wide-area telemetry and synchronized data logging.
Its modules leverage the precise timing information contained in GPS signals to achieve millisecond-level synchronization across large distances. The modules can run for several days on battery power while continuously streaming data across a cellular connection. Data is also continuously recorded to the on-board memory card, allowing use in remote locations with poor or absent cellular coverage.
Stored data is kept for at least one week before being automatically overwritten. Both live and recorded data is tagged with precision timestamps as long as the GPS signal is available, allowing synchronized display of data acquired from several distant modules.
Main Features
Its modules leverage the precise timing information contained in GPS signals to achieve millisecond-level synchronization across large distances. The modules can run for several days on battery power while continuously streaming data across a cellular connection. Data is also continuously recorded to the on-board memory card, allowing use in remote locations with poor or absent cellular coverage.
Stored data is kept for at least one week before being automatically overwritten. Both live and recorded data is tagged with precision timestamps as long as the GPS signal is available, allowing synchronized display of data acquired from several distant modules.
Main Features
- Continuous data streaming at kilosample/second rate over cellular connection
- Continuous data recording with > 1 week capacity and automatic overwrite
- Millisecond-level synchronization between distant modules, GPS-based
- Centralized live and recorded data display on fixed or mobile workstation
- Remote module configuration
- Flexible, individually-isolated channels with software-selectable input ranges up to +/- 400 V
- Robust isolation and overvoltage protection: 600 V continuous on all ranges
- Suitable for mains voltage monitoring: CAT III 300 V rating, 4 kV impulse withstand voltage
- High-performance input filters for electromagnetic interference (EMI) suppression
- Precision analog inputs: 16 bits, < 1% error over temperature, integrated antialias filter
- Wide operating temperature range: -20 … 60 ºC.
- Remote battery operation capability, continuous use: 80 hours standard, 1 week extended option
- Compact module size
- Easy-to-use software
- Large Infrastructure Monitoring
- Event Tracing in Large-Scale Systems
- Remote Diagnostics
- Electrical Distribution Networks
- Railway Signaling Systems
- Pipelines
- Bridges
- Solar, Wind Farms
- Communication Relays
- Remote Monitoring Stations
Technical Specifications - Acquisition Modules
Technical Specifications - System Level
| Input Channels | 2 individually isolated analog inputs per module |
| Input Ranges (Software Selectable) |
-50 … 50 V (30 V ac rms) -400 … 400 V (250 V ac rms) |
| Mains Measurement Category | CAT III 300 V |
| Overvoltage Protection | 600 V continuous, independent of selected range |
| Isolation Voltage | 600 V continuous; 4000 V impulse, non-repetitive |
| Measurement Error | < 0.2 % at 25 ºC < 0.5 % between 0 and 50 ºC |
| A/D Conversion Resolution | 16 bits |
| Sampling Rate | ~ 1.5 kS/s/channel (3000 / 2048 theoretical) |
| Analog Input Bandwidth | 200 Hz (integrated antialias filter) |
| Protection Against Electromagnetic Interference (EMI) | high-frequency analog filter low-frequency digital FIR filter > 60 dB attenuation from 1 kHz to 20 MHz |
| Input Impedance | > 100 kΩ |
| Timing Error | < 10 ms with GPS signal available |
| Battery Life (Continuous Operation) | > 80 hours standard, > 1 week extended option |
| Data Storage Capacity | > 1 week; automatic overwrite of oldest data |
| Data Communication | 4G cellular network (LTE Cat 1) with 3G fallback |
| Operating Temperature | -20 … 60 ºC |
| Relative Humidity | 20 … 80 % non-condensing |
| Altitude | up to 2000 m; higher with voltage derating |
| Mechanical Protection | IP 20 |
Technical Specifications - System Level
| Architectural Limitations | each acquisition module must be registered with a single workstation; there is no limitation on the number of workstations |
| Channel Count | number of registered modules per workstation: 32 simultaneous data display: 64 channels (8 channels/graph x 8 graphs) practical suggestion: 16 channels (4 channels/graph x 4 graphs) |
| Data Transfer | each workstation and its associated modules should ideally have Internet connectivity, e.g. through the cellular network, but manual data transfer by memory card is possible |
| Data Security | data is routed over the public Internet; all connections use TLS for encryption and mutual authentication with 2048-bit keys |
| Data Synchronization Between Modules | timing error < 10 ms between any 2 channels, when GPS signal is available at both modules |
| Documents | |
| Datasheet (EN) | Product datasheet of Sargon RD22 Wide-area Synchronized Data Acquisition System |
| Datasheet (RO) | Fișă tehnică de prezentare sistem distribuit de achiziție sincronizată de date tip Sargon RD22 |
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