Smart Power Monitor
• High-performance Power Monitor Suitable for On-panel Mounting and Display
• Assists Energy-saving Analysis
• Energy classification for wasted standby and stopped power.
(Classification based on external inputs is also supported.)
• Power and current can be measured simultaneously.
Measurement of flow rates with a pulse conversion function.
• Simple temperature measurements with Temperature Sensor included in the Unit.
• High-precision Measurements
• Measurement of generated power (regenerative power),
leading reactive power, lagging reactive power, and consumed power.
• Power measurements on the primary side of inverters,
which are widely used to save energy.
• Automatic range switching for accurate measurement of standby and stopped power.
• Energy-saving Functions
• Conversion to monetary cost. (Also used for classified standby and stopped power.)
• Alarm outputs can be selected for active power, reactive power,
regenerative power, current, voltage, or power factor.
• The Power Monitor can log measurement data and supports Modbus communications.
For the most recent information on models
that have been certified for safety standards,
refer to your OMRON website.
• Installation and Settings
• Direct measurement of three-phase, four-wire, 400-V line voltage.
• Simple measurements without voltage wiring.
• Incorrect voltage wiring detection.
Note: Not valid for billing applications.
Refer to “Safety Precautions” on page 10.
■ Functions That Support Energy-saving Analysis
● Energy Classification (First in the Industry)
Three-state Energy Classification with three-color
displays lets you know where energy can be saved.
1) Three-state Energy Classification divides the total power
consumption into stopped power, standby power, and operating
power depending on the power usage conditions so that you can
see where energy can be saved.
2) Three-state Energy Classification can be linked to three
independent outputs for operating, standby, and stopped status.
The criteria can be set as the threshold value of the power, current,
or voltage, or as an external input.
It is also possible to change the three color display.
Three-state Energy Classification
Note: This is just an example of setting the threshold values.
● Pulse Measurement and Conversion
1) Flow rates can be measured at the same time as power by
inputting flow pulses. (Two inputs are supported.)
To support energy-saving analysis, power consumption can be
compared with the flow rate of air, gas, or other fluids with a single
2) Pulse inputs can be counted, or used to measure the ON time.
The consumption rate of a device can be measured by dividing the
power consumption with the measured number of operations or
Pulse Input Count Measurement
Pulse Input ON Time Measurement
10 s 3 s 5 s
● Simple Temperature Measurement
KM50 Power Monitors have a thermister chip built onto the panel
surface for easy measurement of the panel surface temperature.
The temperature display can be offset to match the room temperature
to manage trends.