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      Applications which have multiple distributed modules communicating to a master device can “lock-up” for various reasons. When the system needs high availability or the remote the distributed modules are hard to get to, we recommend using the Watchdog Power Reset Unit (WPRU).

      • Digital, pulse and RS485 inputs.
      • Input signal ranges from ±20 mV to ±100 V, ±1 mA up to ±10 A. Standard inputs 4-20 mA, 0-10 V, etc.
      • AC and DC voltages up to 250 V, currents up to 10 A.
      • Input impedance of >100 kΩ for the voltage input and 50 Ω or less for the current input models.
      • Potential free relay contact or transistor output.
      • Relay contact rating 230 VAC or 30 VDC up to 5 A resistive load.
      • Uncommitted transistor output at 50 V 1 A.
      • Internal link selection of normally open or normally closed relay output.
      • Single-turn trimpot adjustment for setting the Input Fail Delay Time (SP1).
      • Multi-turn trimpot adjustment for setting the Output Open/Off Time (SP2).
      • Various auxiliary supply options: 24 VDC, 12 VDC, 9 - 18 VDC , 20 to 30 VDC, 18 – 36 VDC, 36 - 72 VDC, 9 - 72 VDC.
      • Power requirement is 2.5 W maximum.
      • Isolation between inputs, power supply and output >1000 VDC.
      • Operating temperature -10 to 70°C.
      • 24 hour operational burn-in.
      • DIN rail mounting.
      • High quality self-extinguishing polyamide enclosure.
      • Screw terminal connections.
      • Dimensions 25 x 80 x 85 mm (W x H x D).
      • System protection from firmware, software or communications lockouts.
      • Power monitoring to be able to control the power supply to a device which should only operate between the correct supply levels.
      • Can be used to monitor a periodically pulsed digital output, typically from a PLC or other remote device.
      • GPRS remote logging or telemetry systems can be automatically restarted if they fail to respond to the polling device.
      • Restart you hardware which is difficult to reach or is installed in some distant location.
      • Basic logging of device health by recording the system resets.