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DMS-20ACV Series

480V, Self-Powered, AC Line Monitor

MPM_DMS-20ACV.B02 Page 1 of 4

Murata Power Solutions’ DMS-20ACV-3 is a low-cost, self-powered, 2-wire digital AC voltmeter designed

for monitoring 3-phase, 480Vac primary ac power sources. The DMS-20ACV-3’s unique power-supply

design allows a single model to operate from 350 to 600Vac, at line frequencies of 50 to 60Hz. No user-

supplied external components or auxiliary power sources are needed for full operation. Its large, 0.40 inch

(10.2mm), bright red or green LED display is easily readable under virtually all lighting conditions.

DMS-20ACV-3 AC voltmeters employ a microprocessor driven, half-wave averaging, analog-to-digital

converter to achieve a display resolution of 1Vac over its entire operating range. Also, the unit is per-

manently calibrated at the factory, ensuring stable, long-term accuracy by eliminating issues caused by

user-accessible adjustment potentiometers.

The DMS-20ACV-3 measures only 1.94” wide x 1.27” high (49.3mm x 32.3mm), and has an installed

behind-the-panel depth of less than 1.0” (25.4mm). Panel mounting is greatly simplified by the use of a

bezel assembly that includes a color filter and secure metal fasteners.

This easy-to-use AC voltmeter is the ideal digital upgrade for fragile, less accurate, analog panel meters

used in 480Vac power distribution environments. It similarly excels in any new application requiring accu-

rate, high-voltage, AC line monitoring. Simply connect the AC power source to its 2-position terminal block

and the unit is fully operational.

FEATURES

„ Self-powered, 2-Wire operation

„ 350 to 600Vac (50/60Hz) measurement range

„ Digital replacement for analog panel meters

„ Permanent, tamper-proof calibration

„ Half-wave averaging, rms calibrated input

„ Large, easy-to-read, bright red or green LED

display

„ Flashing display warns of overvoltage conditions

„ Reliable screw-style terminal block simplifies

hookup

„ Rugged bezel assembly with secure metal

fasteners

„ Small footprint: 1.94W" x 1.27H" (49mm x 32mm)

PRODUCT OVERVIEW

MECHANICAL SPECIFICATIONS

MECHANICAL DIMENSIONS: Inches (mm)

TOLERANCES:

2 PL DEC ±0.02 (±0.51)

3 PL DEC ±0.010 (±0.254)