www.murata-ps.com
ACM20 Series
Four-Function AC Power Meters
PRODUCT OVERVIEW
Murata Power Solutions’ ACM20 series AC power meters display the most critical
measurements in mains-powered equipment: voltage, amperage, active power (watts), and
power factor. A front panel selector-switch provides two modes of operation: a fixed reading
of any of the four parameters, or a continuous cycling through all four measurements. An
optional model displays line frequency with 0.1Hz resolution. All ACM20 multi-function
power meters include built-in current transformers—no other user-supplied components
are required.
ACM20 series AC power meters are available in a choice of two input ranges: 0-32A
(with 0.01A resolution, 9999 watts max.); 0-100A (0.1A resolution, 26.4kW max.). An
85-264Vac (47-63Hz) operating supply range makes these power meters perfect for
worldwide power monitoring applications. And, unlike conventional, average-responding
products, ACM20 power meters can accurately display the true-rms voltage and current
values of triangle waves, square waves, and other irregularly shaped waveforms, with an
accuracy of ±1% of full scale.
Their large (0.36"/9.2mm), bright red LED display makes ACM20 AC power meters
easily readable from as far as 15 feet (5 meters). All units are packaged in a one-piece,
vibration resistant, polycarbonate housing that can be installed in vertical ‘0U’ and ‘1U’
rack spaces. Their miniature size is perfect for UPS power sources, power strips, labora-
tory instrumentation, alternative energy applications, and any other products that require
precise monitoring of AC power.
Actual size
FEATURES
Displays AC Volts, Amps, Watts, and Power Factor
User-selectable display modes: continuous auto cycling,
or fixed reading
Universal 85-264Vac (47-63Hz) operating range
Built-in current transformers simplify installation; choice of
32A or 100A ranges
Ideal for power distribution units (PDUs) and power strips
True-rms readings of complex voltage and current waveforms
Low-power consumption: less than ¼watt from 120Vac
One-piece polycarbonate housing fits ‘0U’ & ‘1U’ racks
Surface mount design occupies minimal panel space
Bright red LED-display with four annunciators
Optional Frequency reading models (0.1Hz resolution)
SIMPLIFIED SCHEMATIC DIAGRAM
VOLTS
LOAD CURRENT
+5V
L1
AMPS
WATTS
PF
A/D
CONVERTER
+5V
B
85-264 Vac
47-63 Hz
+5V
AC/DC
CONVERTER
MICRO-
CONTROLLER
A
For full details go to
www.murata-ps.com/rohs
SEL
www.murata-ps.com/dpm
email: sales@murata-ps.com
08 Oct 2009 MPM_ACM20 Series.A03
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MURATA-PS [ MURATA POWER SOLUTIONS INC. ]
