505U-K Radio Telemetry Module

The 505/905U-K family of products feature ultra-low power consumption and small I/O counts for transmission to other ELPRO I/O and gateway products. Capable of thousands of units in a network, these products revert to a ‘sleep mode’ between transmissions to conserve power and reliably run on battery power for extended periods of time. With robust aluminum enclosures (IP66) and the capability of powering a loop-powered device (24VDC, 50mA), these units are ideal for remote applications where power constraints may be a concern.



  • 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


  • 525 MHz frequency and 500 mW RF power, or 869.875 MHz frequency and 5 mW RF power models
  • Link process inputs to single or multiple outputs (peer to peer)
  • 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 set point status, pulse rate and pulse total, power/battery supply voltage, and power supply alarm
  • an connect to up/down counter transducers, such as shaft encoders
  • Configurable repeat transmissions to five times for message reliability
  • Set point, pulse count, and rate available. Additional internal I/O points provided for health monitoring
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