dms-20rm Murata Manufacturing Co., Ltd, dms-20rm Datasheet

dms-20rm

Manufacturer Part Number

dms-20rm

Description

True-rms Ac Voltmeters With Isolated Inputs

Manufacturer

Murata Manufacturing Co., Ltd

Datasheet

1.DMS-20RM.pdf (4 pages)

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FEATURES

■

TYPICAL WIRING DIAGRAMS

www.murata-ps.com

Measures the rms value of complex ac voltages

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

Two operating-supply options: 85-264Vac, or +10-40Vdc

Input circuit fully isolated from operating power supply

47-1kHz input frequency range

Fully encapsulated plastic package measures 1.38” x

0.88” (35mm x 22.4mm)

Large, easy-to-read, red LED display is visible from 12

feet (4m)

TB1

www.murata-ps.com/rohs

For full details go to

TB2

Figure 1A.

AC VOLTAGE

TO BE MEASURED

AC POWER

SUPPLY

www.murata-ps.com/dpm

TB1

Figure 1B.

that measure and display the true-rms values of complex ac waveforms. Because the input

circuitry is electrically isolated from the unit’s operating power source, these voltmeters

can measure signals down to zero volts. No external isolation transformers or auxiliary

power supply conditioning components are required. Simply connect the input signal and a

source of operating power (85-264Vac, or an optional +10-40Vdc) to the two rear-mounted

terminal blocks and the unit is fully operational.

(with 0.01V resolution); 200Vac (0.1V resolution); and 0-300Vac (1V resolution). An input

frequency range of 47-1kHz makes these voltmeters ideal for all ac voltage monitoring

applications. And, unlike conventional, average-responding products, these meters can

measure and accurately display the true-rms value of triangle waves, square waves, or

other irregularly shaped waveforms with 0.4% full-scale accuracy.

easily readable from as far as 12 feet (4 meters). All units are packaged in a red-ﬁ lter case

with a built-in bezel; these meters are fully encapsulated to make them moisture and vibra-

tion resistant. Their miniature size is perfect for high-end consumer electronics, laboratory

instrumentation, alternative power generators and other products requiring precise ac line

monitoring.

Murata Power Solutions’ DMS-20RM series are four-wire, self-contained ac voltmeters

DMS-20RM rms voltmeters are available in a choice of three input ranges: 20Vac

The large (0.37”/9.4mm), bright red LED display makes the DMS-20RM ac voltmeters

TB2

AC POWER

SUPPLY

True-rms ac Voltmeters with Isolated Inputs

Technical enquiries email: sales@murata-ps.com, tel:

DMS-20RM Series

TB1

MPM_DMS-20RM.A03 Page 1 of 4

TB2

Figure 2.

AC VOLTAGE

TO BE MEASURED

DC POWER

10-40Vdc

SUPPLY

+1 508 339 3000

Related parts for dms-20rm

dms-20rm Summary of contents

Page 1

... DMS-20RM rms voltmeters are available in a choice of three input ranges: 20Vac (with 0.01V resolution); 200Vac (0.1V resolution); and 0-300Vac (1V resolution). An input frequency range of 47-1kHz makes these voltmeters ideal for all ac voltage monitoring applications ...

Page 2

... DC-powered models (‘-DC2’ sufﬁ x) are reverse-polarity protected, and must be connected as shown in Figure 2 for proper operation. — +60 ºC DMS-20RM ac voltmeters are not internally fused. If fusing is required — +75 ºC it must be externally installed according to the supply wire’s maximum — ...

Page 3

... True-rms ac Voltmeters with Isolated Inputs 1.30 0.040 (33.0) (1.02) 1.38 (35.1) FRONT VIEW www.murata-ps.com/dpm DMS-20RM Series 2.01 (51.1) 1.00 (25.4) 0.040 (1.02) 0.800 0.040 (20.3) (1.02) 0.880 (22.4) BACK VIEW TB1 - Power Supply CAL. CAL. CAL. TB2 - Input Signal Technical enquiries email: sales@murata-ps.com, tel: MPM_DMS-20RM.A03 Page 1.600 (40. 508 339 3000 ...

Page 4

... Panel Installation All connections to DMS-20RM ac voltmeters must be made after the meter is securely attached to the panel, with all associated ac supply power sources de-energized (off). The installed wire positions should be such that minimal forces are applied to terminal blocks TB1 and TB2. In high-vibration environments, proper strain reliefs must be used for all wiring. ...

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