Newtrax - Wireless Node Rtu Vibrating
Fixed Instrumentation & Control Devices

Wireless Node – RTU for
Vibrating Wire Instruments

— Model Number —NTX-WN-RTU-VW-100

Device Highlights

  • Can monitor up to 4 vibrating wire and/or thermistor instruments from most manufacturers

  • Embedded intelligence samples the instruments and digitizes the signal prior to transmission

  • Data acquisition is completely wireless and battery-powered, with years of battery life

  • Extends the wireless network infrastructure coverage by relaying data from other wireless nodes
  • Provides both mobile access and backhaul routing functionalities

Device Specifications

— Networking —

RF front end
  • 915-928 MHz
  • NMO antenna connector
  • +3dBi omnidirectional antenna
  • TX radiated power: configurable from 1mW to 25mW
  • RX sensitivity: at least -100 dBm
  • 32 x 200 kHz channels
  • Typical omnidirectional range in underground mines: 50 m to 150 m depending on antenna placement, tunnel dimensions and curvature, obstructions and rock type
  • Typical omnidirectional range on surface: 50 m to 600 m depending on antenna placement and obstructions
Spread spectrum protocol
  • TDMA / FHSS
  • Synchronization for communications: ad hoc, per link and distributed
  • Hopping speed: once per time slot
  • Hopping pattern: pseudorandom
  • Link level acknowledgements
  • 76.8 kbps data rate with effective link throughput up to 2.6 kbps (half duplex)
Wireless multi-hop networking protocol
  • 16-bit network address
  • Ad hoc self-organizing and self-healing
  • Routing capability: any-to-any unicast, broadcast, and to/from Central Server via nearest Gateway
RFID
  • Unique 32-bit identification number
  • User configurable label set via Central Server GUI

— I/O interface for instrumentation —

  • 18-pin connector for connection to peripheral junction box
  • Four 5-pin terminal blocks (3-pins vibrating wire, 2-pins thermistor) in peripheral junction box

— Firmware options —

  • VW instrumentation and thermistor signal processing
  • MineHop fixed router
  • MineTrax tag

— Power Supply —

  • Battery-powered with replaceable battery pack
  • Battery life: typical = 3 years (depends on level of network activity), minimum = 1 year (standard warranty)
  • Low-battery alarm sent to Central Server provides at least 1 week of advance notice
  • Option of external 5-14 VDC line power via 4-pin RS-232 port

— Physical Characteristics —

  • Operating temperature: -40 ºC to +85 ºC
  • Weatherproofing: IP65
  • Dimensions of wireless node RTU: 120 mm x 120 mm x 90 mm + Antenna + Connectors
  • Dimensions of peripheral junction box: 120 mm x 120 mm x 60 mm + Connectors