Multipurpose programmable module NDAS-RT
NDAS-RT is a multipurpose programmable module designed for seismic monitoring and real-time seismic safety.
It can operate as a node of the Seiscomp 3 networks. The module is specifically designed to expand the networking capabilities of digital seismic sensors produced by R-sensors. However, it can also be used as a standalone device.
The basic features of NDAS-RT include support for CME-xxND and MTSS-xxND series digital seismometers and accelerometers, Seedlink protocol over Ethernet, 6 auxiliary ADC channels and two groups of relay contacts to control external devices.
Modifications are available with additional network interfaces including RS-485, CAN, Wi-Fi, GSM / 3G / LTE, Bluetooth, etc.
An open platform running Linux allows widely adapting the NDAS-RT software to the specific tasks of filtering, processing and transmitting the seismic data.
NDAS-RT allows greatly expanding the capabilities of data loggers having COM- or USB-ports only. Special software modules can develop a complete seismic station with a SeedLink server and a web interface to configure the instrument remotely and to view the signals. This solution is ideal for users of Delta-Geon, Baykal-ASN and other data loggers.
Application notes on using NDAS-RT to construct real-time monitoring systems for a bridge as an example.
Characteristics Delivery and warranty
| Dynamic range | |
| Supply voltage | 12/24 V Nominal (9-36 V permissible) |
| Power consumption | 1000-1400 mW (depending on load) |
| Temperature range | -40°C - +85°C - industrial SD-card |
| ADC sampling rate | - |
| Dimensions | 225 x 160 x 55 mm |
| ADC resolution | - |
| Weight | 1 kg |
| Reference generator stability | 0.3 ppm |
| Case material | Aluminum, waterproof |
| Gain coefficients | - |
| Number of channels | Auxiliary ADC: 6 single-ended or 3 differential channels |
| Data recording mode | continuous, event onset |
| Data recording format | miniSeed |
| Data storage | internal microSDXC cards of up to 256 Gb, external USB drives of any volume |
| Data transfer | Seedlink over Ethernet |
| Inbuilt sensors for device health monitoring | temperature, humidity |
| Case connectors | Russian type 2RMG (2РМГ-18Б7Ш) – power, RS-485/CAN, Russian type 2RMG (2РМГ-24Б19Ш) – auxiliary ADC channels and relay outputs, SMA-F – connection of GPS/Wi-Fi antenna (optional) |
| Delivery set | USB type A/B standard cable, 8P8C connector for IP68 cable, power connector for cable, auxiliary ADC connector and relay outputs for cable |
| GNSS receiver | optional |
| GNSS timing accuracy | - |
| Auxiliary ADC | 6 single-ended or 3 differential channels, 12 bit resolution, input range ±10 V single ended, ±20 V differential channel |
| Additional network options | Wi-Fi, GSM / 3G / LTE, Bluetooth, CAN, RS-485 |