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The Watchdog Scout rectifier monitor is designed to withstand all the challenges encountered in CP rectifier monitoring applications. With built-in interruption and rigorously-tested surge protection, the Scout is built to help the CP professional have piece of mind over the CP system. The compact sized, lockable NEMA4x enclosure provides a secure, protective environment for the state of the art electronics. Advanced, self-testing circuitry automatically verifies the channel calibration to a known, stable voltage with every reading – this assures the most accurate readings available, every time.

The Scout surge protection circuitry has been rigorously tested per IEC 61000-4-5 specifications. This test method most closely correlates with the lightning and input power surges encountered by remote monitor equipment in the field.

The powerful Elecsys Web Monitor interface provides instant visibility to the status of your field assets, and simplifies multiple rectifier GPS-synchronized interruption, group polling, and automatic compliance report generation.

    Hardware Features

  • Surge Resistant Icon

    Surge protection tested (conducted voltage test per IEC 61000-4-5 specifications)

  • Input Icon

    4 analog measurement channels, 2 digital input channels (dry-contact, pulse accumulation), AC mains on/off detection channel (probe included), GPS synchronized current interruption

  • Calibration Icon

    New, “Automatic Calibration Verification" circuitry assures precision measurement accuracy every time

  • 2 Way Icon

    2-way cellular or satellite telemetry options for reliable communication anywhere in the world on demand

  • AC Mains Icon

    AC mains on/off detection

  • Elecsys Remote Monitoring System

  • Alarm and return to normal notifications via e-mail and/or SMS text message

  • Global communication to the Elecsys Web Monitor system via cellular or satellite telemetry

  • Intuitive, “point & click" web interface

  • Firmware reprogrammable over the air (cellular units only)

Hardware Specifications


Digital cellular
Modbus (RS232) RTU slave connection for use w/customer supplied SCADA data radio

Operating Environment

Temperature: -40°C to +85°C (-20° C to +70° C in battery backup power mode)
Humidity: 0—100% non-condensing
Enclosure rating: NEMA 4X polycarbonate

Power Options

8-35 VDC or 10-25 VAC, rechargeable backup battery for alarm notification of power failure
Power consumption:7.2W @15V typical, 22.7W @15V transmitting and interrupting


NEMA4x Enclosure: 8" (20.3 cm) X 10" (25.4 cm) X 4" (10.2 cm)


2 relay control outputs


4 analog measurement channels
2 digital dry-contact/pulse accumulator channels
1 AC detection probe input

Interrupter Module

GPS synchronized
Syncs with all popular portable interrupters
Relay options:
100 Amp mercury relay
Solid state AC relay (10VAC - 120VAC, 100A)
Solid state DC relay (1VDC - 100VDC, 100A)
Low-voltage AC solid state relay system
Solid state AC with mercury bypass dual relay system
"Mercury free" solid state AC with mechanical bypass dual relay system

Measurement Accuracy

Rectifier voltage input: Range = +/-200V, measurement accuracy better than +/- 100mV
Rectifier current input: Range = +/-100mV, measurement accuracy better than +/- 100uV
Potential input: Range = +/-10V, measurement accuracy better than +/- 100uV