DMU-30ACV-1-DR-C【PDF 1/3 页】VOLT METER LED 200ACV 0.1V RED

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www.murata-ps.com

FEATURES

? Measures and displays the true-rms value of complex

ac voltages

? Three input ranges: 20Vac, 200Vac and 300Vac

? Daylight-readable LED display with automatic

brightness adjustment

? Moisture & impact resistant package offers

NEMA-4/IP65 protection

? Operates from universal 85-264Vac or 110-300Vdc

? Input circuit fully isolated from operating

ac power source

? 47-1kHz input frequency range with crest factors

up to 5

DMU-30ACV Series

Ruggedized True-rms ac Voltmeters with Daylight

Readable, Auto-Dimming LED Displays

Murata Power Solutions’ DMU-30ACV series of daylight-readable ac voltmeters mea-

sure and display the true-rms values of complex ac waveforms. Their large 0.56” (14.2mm)

high super-bright red LED-display is readable in full sunlight. An auto-dimming circuit

automatically adjusts the display brightness for all viewing conditions.

And all DMU-30ACV ac voltmeters are packaged in a plastic package with an integrated

bezel and gasket assembly designed to meet NEMA-4/IP65 for moisture resistance in

outdoor applications.

DMU-30ACV series rms voltmeters are available in a choice of three input ranges:

20Vac (with 0.01V resolution); 200Vac (0.1V resolution); and 300Vac (1V resolution).

Because the input circuitry is electrically isolated from the unit’s operating power source,

these voltmeters can measure ac signals down to zero volts. An input frequency range

of 47-1kHz makes these voltmeters ideal for all ac voltage monitoring applications. And,

unlike conventional average-responding designs, these meters can measure and accurately

display the true-rms value of triangle waves, square waves, or any other irregularly shaped

waveform, with 0.4% full-scale accuracy.

DMU-30ACV series’ miniature size and ruggedized package is perfect for all industrial

and high-reliability instrumentation, alternative power generators, and any other application

which requires precise ac line monitoring in harsh indoor/outdoor environments. Simply

connect the input signal and an 85-264Vac source of operating power to the two rear-

mounted terminal blocks and the unit is fully operational.

TECHNICAL NOTES

IMPORTANT! To ensure safe and reliable operation, DMU-30ACV ac voltmeters must

be installed and serviced by quali?ed technical personnel. Contact Murata Power

Solutions / DATEL if there is any doubt regarding installation and/or operation.

1. Measurement Type: DMU-30ACV series ac voltmeters employ a precision rms-to-dc con-

verter and a stable voltage reference to measure and display the rms value of complex ac

waveforms. Crest factors as high as 5 produce minimal additional errors (see Perfor-

mance Speci?cations).

2. Wiring: All ac supply and input signal wiring must be adequately rated for the voltages

CAL

BRIGHTNESS

ADJUST

and currents they will carry, and must comply with any code or application-mandated

requirements pertaining to the user’s speci?c installation.

3. Power Supply Polarity, Fusing, Wiring and Grounding: The power supply inputs (TB1-1

and TB1-2) on DMU-30ACV voltmeters are not polarity sensitive, that is, they have no “AC

LO” or “AC HI” designations. These units do not include or require a connection to earth/

chassis ground. Refer to Figure 1 for a typical wiring diagram.

TB1

REAR VIEW

–

TB2

Wires speci?ed in the Functional Speci?cations section must be used for making connec-

tions to DMU-30ACV series voltmeters. All power-supply and load wiring must be rated

for the supply voltages and currents they will conduct and must comply with any code or

application-mandated requirements pertaining to the user’s speci?c installation.

85-264Vac

Power Source

Input Signal

DMU-30ACV voltmeters are not internally fused. Terminal block TB1 is to be used only

Figure 1. DMU-30ACV wiring diagram

for powering the power meter’s internal circuitry; it must not be used to supply power

to external loads. The supply wires feeding these power meters must be fused with a

0.5A/250V time delay/time lag fuse, in accordance with applicable regulatory codes.

Wire insulation must be stripped to within ±10% of the stated dimensions, and wires

should be inserted into TB1 such that their insulation is not pinched by the screw terminal.

For full details go to

www.murata-ps.com/rohs

www.murata-ps.com/support

MPM_DMU-30ACV.B09 Page 1 of 3

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