905U-K Wireless IO Module

The ELPRO 905U-K Wireless I/O is a small I/O transmitter that extends long range, license-free communications to sensors in local, remote, or difficult to reach locations. Designed with low power consumption and simple plug-in of ELPRO BU-5 Battery Packs, the ELPRO 905U-K provides reliable continuity in environments typical of industrial applications with power constraints. Capable of transferring analog, pluse or discrete inputs, and powering a loop powered analog device (24Vdc, 50mA), offers a simple to deploy and highly reliable solution.



  • Utility industries:
    • electricity,
    • water and gas.
  • Indicative Applications:
    • High level alarms,
    • Security gate control,
    • Emergency shower notification,
    • Flow meter monitoring,
    • Storage tank monitoring,
    • Pipeline cathodic protection,
    • Pump stop-start,
    • Lighting bank control,
    • Power reticulation relay,
    • Fault notifications,
    • Weather station reporting,
    • Bearing condition monitoring


  • Multiple power supply options, including battery-only supply with ultra-low power consumption (reverts to “sleep” mode)
  • Input-only transmitter unit (2 or 4 DI/PI, 1 AI) that can be connected to multi-I/O and/or gateway units, up to 3000 units in a system
  • Peer-to-peer communications with exception reporting, reliable self-checking via update time, and secure data encryption
  • External inputs plus internally calculated values including analog setpoint status, pulse rate and pulse total, power/ battery supply voltage, power supply alarm.
  • Class I Div 2 hazardous areas approval (USA/Canada).
  • Can connect to up/ down counter transducers such as shaft-encoders.
  • Configurable repeat transmissions to five times for message reliability
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