DATEL, Inc., Mansfi eld, MA 02048 (USA)
Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356
Email: sales@datel.com
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. Specifi cations are subject to change without notice. The DATEL logo is a registered DATEL, Inc. trademark.
DMS-20LCD-2/3-DCM
Self-Powered, +50V and +150V, LCD
Display, 2-Wire DC Voltage Monitors
Features
Actual Size
DATEL's DMS-20LCD-2/3-DCM, self-powered, +90V and +150V voltage
monitors set new standards for quality, performance, size and cost. Simply
apply dc power to the two rear terminals and the unit is fully operational---no
additional components or connections are required! Their large, 0.37"/9.4mm,
LCD displays feature built-in "VDC" annunciators
and can be easily read from 10 feet. Two models
are available: one for +42Vdc nominal operation
(+18.0 to +90.0V range, `-2-DCM'), the other for
+120Vdc nominal operation (+50.0 to +150.0V
range, `-3-DCM'). Reverse polarity protection and
0.1V resolution are standard on both models.
Like their +12V (`-0-DCM') and +24V
(`-1-DCM') counterparts, DMS-20LCD-2/3-DCM
meters utilize a precision analog-to-digital con-
verter and ultra-stable passive components to
achieve excellent performance over the wide oper-
ating temperature range of 0 to +60C. A rugged,
ABS plastic package provides excellent protection
against shock and vibration. DMS-20LCD-DCM's
are the most accurate, LCD-display, dc-voltage
monitors available at any price.
Self-powered, 2-wire operation
+18.0 to +90.0Vdc or +50.0 to +150.0Vdc ranges
Ideal for 42V automotive systems and 120V chargers
Reverse polarity protected; 0.1V resolution
Built-in "V
DC
" annunciator
Large (0.37"/9.4mm) LCD displays
Subminiature 1.38" x 0.88" x 0.66" packages
Rugged, ABS plastic package; Low cost
Ordering Information
Input
Voltage Range:
DMS-20LCD-2-DCM +18.0 to +90.0Vdc
DMS-20LCD-3-DCM +50.0 to +150.0Vdc
Max. Current Consumption:
DMS-20LCD-2-DCM 2mA @+50V, 3mA @ +90V
DMS-20LCD-3-DCM 1.5mA @ +100V, 2mA @ +150V
Performance
Sampling Rate 2.5 readings/second
Accuracy @ +25C:
DMS-20LCD-2-DCM 0.1V (typ.), 0.3V (max.)
DMS-20LCD-3-DCM 0.2V (typ.), 0.4V (max.)
Temperature Drift (0 to +60C):
DMS-20LCD-2-DCM 0.3 counts/C (max.)
DMS-20LCD-3-DCM 0.4 counts/C (max.)
Mechanical
Display Type:
DMS-20LCD-2-DCM 3 digit LCD, 0.37"/9.4mm high
DMS-20LCD-3-DCM 3 digit LCD, 0.37"/9.4mm high
Weight 0.5 ounce (14 grams)
Case Material ABS
Environmental
Operating Temperature 0 to +60C
Storage Temperature 20 to +75C
Humidity (Non-condensing) 0 to 85%
Functional Specifi cations
Brass screws (6-32 thread) and a panel-mount retaining clip are
supplied with each meter
Order online at www.datel.com
Operation and accuracy at voltages above or below these ranges
are not specifi ed.
Mechanical Specifi cations
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.
DS-0499A
04/03
D C
1.30
(33.0)
1.38
(35.1)
0.025
(0.64)
0.880
(22.4)
0.04
(1.016)
0.43
(10.9)
0.66
(16.8)
0.04
(1.016)
0.04
(1.016)
0.37
(9.4)
0.800
(20.3)
0.38
(9.7)
0.25 DIA.
+
0.27
(6.9)
0.75
(19.1)
#6-32
UNC THD
0.10
(2.5)
0.19
(4.8)
1.63 (41.4)
1.83 (46.5)
1.28
(32.5)
1.07
(27.2)
0.10
(2.5)
#2-56 INSERT
0.156 (3.96 DEEP)
DMS-BZL3
OPTIONAL BEZEL
DATEL
Typical panel mount installation and
suggested wiring (user supplied).
DMS-20LCD-2-DCM +18.0 to 90.0V dc voltage monitor
DMS-20LCD-3-DCM +50.0 to +150.0V dc voltage monitor
DMS-20-CP Panel cutout punch
DMS-BZL3 Panel mount bezel
DMS-BZL4 Panel mount bezel with sealing gasket
Meters are not sealed; Do not expose to moisture or other contaminants.
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