Figure 1. DMS-3019X Simplifi ed Schematic
GAIN
ADJUST
(+) INPUT HI
(–) INPUT LO
DISPLAY TEST
V+
R3
DP 1
DP 2
DP 3
6
5
4
7
8
1
3
DC/DC
CONVERTER
DP COM
+5V
–5V
+5V
1.23V
REF.
»+2.0V
DATA
909k
V+
V–
A/D
CONVERTER
0 Vdc
0.01μF
2
GND
R1
R2
9
SG2
SG1
R1 and R2 are user supplied
~
~
~
DMS-3019X Series
Alternate Source for DP-650 Series, 3½ Digit
LCD Display Digital Panel Voltmeters
MPM_DMS_3019X.D02 Page 1 of 2
www.murata-ps.com
www.murata-ps.com/support
For full details go to
www.murata-ps.com/rohs
Murata Power Solutions’ DMS-3019X Series, 3½ Digit, LCD Display, Digital Panel Voltme-
ters provide DP-650 users with a superior-quality alternate source. The DMS-3019X Series
input/ output connector is pin-compatible with nearly all DP-650 applications. Only minor
sheetmetal modifi cations are needed to attain all the advantages offered by the DMS-3019X
Series digital voltmeters.
Provisions are also included for the addition of custom input-scaling resistors—a feature
found only on DMS-3019X meters. Autozero calibration, autopolarity changeover and a
factory-calibrated ultra-stable reference circuit are standard. A reliable, epoxyencapsulated
DMS-30LCD digital voltmeter, with large (0.4˝/10.2mm) LCD digits, is used in all three mod-
els. All internal and external connections are 100% soldered—no elastomeric connectors are
used.
The DMS-3019X Series offers many noteworthy improvements over its competitors:
wider operating temperature range, lower power consumption and higher input impedance,
to name a few. And, most importantly, all Murata Power Solutions digital panel meters are
designed and manufactured in the USA!
FEATURES
■ Replaces DP-650, DP-652 and DP-654 meters
■ Connects directly to existing wiring
■ ±2V input range
■ Low power consumption
■ Wider operating temperature range (0 to +60°C)
■ Rugged, epoxy-encapsulated plastic packages
■ Large (0.4˝/10.2mm) LCD displays
SIMPLIFIED SCHEMATIC DIAGRAM
ORDERING INFORMATION
DMS-30194 ±2V input
DMS-30193 ±200mV input (Obsolete)
DMS-30195 ±20V input (Obsolete)
DMS-BZL1 Bezel assembly
DMS-BZL2 Bezel with gasket
DMS-30-CP Panel cutout punch
DMS-3019X Series
Alternate Source for DP-650 Series, 3½ Digit
LCD Display Digital Panel Voltmeters
MPM_DMS_3019X.D02 Page 2 of 2
www.murata-ps.com/support
Murata Power Solutions, Inc. 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. © 2015 Murata Power Solutions, Inc.
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfi eld, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
This product is subject to the following operating requirements
and the Life and Safety Critical Application Sales Policy:
Refer to: http://www.murata-ps.com/requirements/
MECHANICAL SPECIFICATIONS
BEZEL INSTALLATION AND RECOMMENDED DRILL AND PANEL CUTOUT
ELECTRICAL SPECIFICATIONS
Typical Single-ended Connections
Power Supply (V+ to GND) +5Vdc, ±5% @ 1.2mA max.
Full Scale Input See Ordering Information
Input Impedance 1 Megohm
Sampling Rate 3 Samples per second
Accuracy (VIN = +0.190V) ±2 Counts max. (±0.1%)
Display Type 3½ Digit LCD, 0.40"/10.2mm high
Operating Temperature 0 to +60°C
Storage Temperature –20 to +75°C
Humidity (Non-condensing) 0-95%
12 R2 1
1
123456
7
R1
6
2345678910
BACK VIEW
V+
GND
DP COM
DP3
DP2
DP1
(+) INPUT
(–) INPUT
TEST
N.C.
+5V
+
–
+
–
+5V Power
Supply V
IN
MADE IN USA
DMS-30194
0.92
(23.4)
0.84
(21.3)
0.040
(1.02)
2.17
(55.1)
2.09
(53.1)
0.040
(1.02)
0.475
(12.07) TYP.
0.40
(10.2)
TYP.
10 1
FRONT VIEW
DP1 DP2 DP3
0.40
(10.2)
0.90
(22.9)
TYP.
0.10
(2.5) TYP.
0.025 SQ.
(0.635)
MADE IN USA
BEZEL INSTALLATION
PANEL
BEZEL
10 1
MADE IN USA
10 1
RETAINING CLIP INSTALLATION
PANEL
A panel-mount retaining clip is supplied with all models
#2-56 INSERT
0.156 (3.96) DEEP
FRONT VIEW 1.270
(32.26)
0.187
(4.75)
DMS-BZL1 and DMS-BZL2
2.35 (59.69)
2.118 (53.80)
0.093 (2.362) DIAMETER (4 REQUIRED)
INTERNAL CORNER RADII:
0.032 (0.81) MAX.
1.07
(27.18)
0.878
(22.30)
0.096
(2.44)
0.116
(2.95)
2.55 (64.77)
DMS-BZL1 & BZL2
PANEL CUTOUT
TOLERANCES: 2 PL DEC ±0.02 (±0.51) 3 PL DEC ±0.010 (±0.254)
LEAD DIMENSIONS: 0.025 (0.635) x 0.025 (0.635) NOMINAL
SG1
SG2
R2
R1
Typical at TA = +25ºC and supply voltage = +5V.
(See DMS-30LCD data sheet for more information.)
