DATEL DMS-20PC-3-LM Datasheet

DATEL, Inc., Mansfield, MA 02048 (USA) • Tel: [phone] Fax: [phone] • Email: [e-mail] • Internet: www.datel.com

DATEL makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained

herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without notice. The DATEL logo is a registered DATEL, Inc. trademark.

DMS-20PC-3-LM

Features

Actual Size

Self-Powered, LED Display

480V AC Line Monitor

Functional Specifications

Ordering Information

DS-0388B 1/99

DMS-BZL3

Optional Bezel

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Self-powered, two-terminal operation

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350 to 600Vac operating input range

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Half-wave averaging, rms calibrated

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Large, easy-to-read, bright red LED display

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Rugged, epoxy-encapsulated construction

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Built-in bezel for panel mounting

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Reliable screw terminals for easy installation

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Small 1.38" x 0.88" x 1.0" package

Input

Voltage Range

➀

350-600Vrms (47-63Hz)

Current Consumption 50mArms (max.)

Performance

Sampling Rate 2.5 readings/second
Measurement Type Half-wave average, rms calibrated

for sinusoidal input
Accuracy @ +25°C ±1V (typ.), ±2V (max.)
Temperature Drift

(–25 to +60°C) ±0.15 Volts/°C (max.)

Mechanical

Dimensions 1.38" x 0.88" x 1.00"
Display Type 3 digit, red LED, 0.37"/9.4mm
Weight 1 ounce (28 grams)
Case Material Polycarbonate

Environmental

Operating Temperature –25 to +60°C
Storage Temperature –40 to +75°C
Humidity (Non-condensing) 0 to 95%

DATEL's DMS-20PC-3-LM is a low-cost, self-powered, 2-wire digital
voltmeter designed for monitoring 480Vac 3-phase primary power. The DMS­20PC-3-LM's unique power-supply design allows a single model to operate
from 350 to 600Vac (47-63Hz). The meter requires
no external components or auxiliary power for full
operation! Its large, 0.37"/9.4mm, bright red LED
display is easily readable under virtually all lighting
conditions.

DMS-20PC-3-LM employs rms calibrated, half­wave sinusoidal averaging to achieve a display
resolution of 1Vac over its full operating range.
Packaged in a subminiature (1.38" x 0.88" x 1.0")
red-filter case with a built-in bezel, the meter is epoxy
encapsulated for ruggedness. An optional bezel
assembly, featuring metal fasteners, simplifies
panel mounting.

This easy-to-use, vibration-proof voltmeter is
the ideal digital upgrade for fragile analog-style
panel meters in 480Vac power distribution equipment.
It similarly excels in any new application requiring accurate,
high-voltage, ac line monitoring.

Mechanical Specifications

Dimensions in inches (millimeters)
Tolerances: 2 PL Dec ±0.02 (±0.51)

3 PL Dec ±0.010 (±0.254)

Recommended panel cutout dimensions:

1.336 (33.93)W × 0.838 (21.29)H

Internal corner radii 0.032 (0.81) Max.

➀

Operation and accuracy at inputs above or below this
range are not specified.

DMS-20PC-3-LM 350-600Vac line monitor with screw

terminals and screws

DMS-20-CP Panel cutout punch
DMS-BZL3 Panel mount bezel
DMS-BZL4 Panel mount bezel with sealing gasket

Brass screws (6-32 thread) and a panel-mount retaining clip are
supplied with each meter

Typical panel mount

installation

Suggested wiring

(User supplied)

®®

DMS-20PC-3-LM

®®

0.75

(19.1)

#6-32

UNC THD

0.44

(11.2)

0.80

(20.3)

0.32
(8.1)

0.04

(1.016)

0.88

(22.4)

1.00

(25.4)

0.04

(1.016)

0.04

(1.016)

1.30

(33.0)

1.38

(35.1)

0.19
(4.8)

1.28

(32.5)

0.10
(2.5)

1.07

(27.2)

0.10
(2.5)

#2-56 INSERT

0.156 (3.96) DEEP

1.63 (41.4)

1.83

(

46.5

)

0.37
(9.4)

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