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PRODUCT OVERVIEW
ACM20 Series
Four-Function AC Power Meters
Actual size
C
?
US E156931
Murata Power Solutions’ ACM20 series AC power meters display the most critical measure-
ments in mains-powered equipment: voltage, amperage, active power (watts), and power
FEATURES
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? Displays AC Volts, Amps, Watts, and Power Factor or Hertz
? Two display modes: continuous auto cycling or ?xed
? Universal 85-264Vac (47-63Hz) operating range
(Measurement Category II)
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? Built-in current transformers simplify installation; choice of
10A, 32A, or 100A ranges
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? Ideal for power distribution units (PDUs) and power strips
? True-rms readings of complex voltage and current waveforms
? Low-power consumption: less than ?watt from 120Vac
? One-piece polycarbonate housing ?ts ‘0U’ & ‘1U’ racks
? Surface mount design occupies minimal panel space
? Bright red LED-display with four annunciators
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? Optional Frequency reading models (0.1Hz resolution)
? Approvals to UL/CSA/IEC/EN 61010-1
SIMPLIFIED SCHEMATIC DIAGRAM
factor. A front panel selector-switch provides two modes of operation: a ?xed 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 three input ranges: 0-10A (with
0.001A resolution, 999.9 watts max.); 0-32A (with 0.01A resolution, 9999 watts max.); and
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 real power and true-rms current values of triangle waves, square waves, and
other irregularly shaped waveforms, with a typical 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, laboratory instrumenta-
tion, alternative energy applications, and any other products that require precise monitoring
of AC power.
LOAD CURRENT
VOLTS
AMPS
WATTS
PF
+5V
L1
A/D
CONVERTER
+5V
CURRENT
LIMITED
B
+5V
85-264 Vac
47-63 Hz
A
AC/DC
CONVERTER
MICRO-
CONTROLLER
SUPPLY
　
For full details go to
www.murata-ps.com/rohs
SEL
www.murata-ps.com/support
MPM_ACM20 Series.B03 Page 1 of 6
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