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DMS-20PC-4/5/6-DCM
Self-Powered LED Display, Negative Input
DC Voltage Monitor
MPM_DMS-20PC-4-DCM.D01 Page 1 of 2
Murata Power Solutions’ DMS-20PC-DCM Series of self-powered, negative-reading, dc
voltage monitors are great replacements for older, hard-to-read, analog meters. Simply
connect a negative voltage across the rear terminals and the meters are fully operational!
Negative-input DCM’s can be easily combined with positive-reading DMS-20PC-DCM’s for
monitoring dual-polarity power supplies.
Three versions are available: one for –4.50 to –19.99Vdc
(0.01V resolution), one for –18.0 to –50.0Vdc (0.1V resolu-
tion), and one for –30 to –264Vdc (1V resolution). Their
large, 0.37”/9.4mm, bright red LED displays can be easily
read from 15 feet away. Built-in reverse polarity protection
assures simple, trouble-free installation.
All DMS-20PC-DCM’s employ a high-resolution, 3½ digit
A/D converter and precision metal-fi lm resistors to achieve
outstanding performance over an operating temperature
range of –25 to +60°C. A rugged, epoxy-encapsulated,
polycarbonate case provides excellent protection against
moisture, shock and vibration.
FEATURES
Self-powered, only two connections required
–4.5 to –20Vdc, –18 to –50Vdc, and –30 to –264Vdc
models
Can be used with positve-reading DMS-20PC-DCM's
Ultra-low power consumption (8mA typ.)
0.37"/9.4mm high, bright red, LED displays
Subminiature 1.38" x 0.88" x 1.0" packages
Ordering Information
Functional Specifi cations
➀ Operation and accuracy at inputs above or below this range
are not specifi ed.
DMS-20PC-4-DCM-C –4.50 to –19.99V dc voltage monitor
DMS-20PC-5-DCM-C –18.0 to –50.0V dc voltage monitor
DMS-20PC-6-DCM-C –30 to –264V dc voltage monitor
DMS-20-CP Panel cutout punch
DMS-BZL3-C Panel mount bezel assembly
DMS-BZL4-C Panel mount bezel with sealing gasket
Brass screws (6-32 thread) and a panel-mount retaining clip are supplied with each meter
Input
Voltage Range: ➀
DMS-20PC-4-DCM –4.50 to –19.99Vdc
DMS-20PC-5-DCM –18.0 to –50.0Vdc
DMS-20PC-6-DCM –30 to –264Vdc
Current Consumption:
DMS-20PC-4/5-DCM 13mA (max.)
DMS-20PC-6-DCM 7mA (max.)
Performance
Sampling Rate 2.5 readings/second
Resolution:
DMS-20PC-4-DCM ±0.01V
DMS-20PC-5-DCM ±0.1V
DMS-20PC-6-DCM ±1V
Accuracy @ +25°C:
DMS-20PC-4-DCM ±0.01V (typ.), ±0.03V (max.)
DMS-20PC-5-DCM ±0.1V(typ.), ±0.2V (max.)
DMS-20PC-6-DCM ±1V(typ.), ±2V (max.)
Mechanical
Dimensions 1.38” x 0.88” x 1.00”
Display Type 3 & 3½ digit, red LED,
0.37”/9.4mm
Weight 1 ounce (28 grams)
Case Material Polycarbonate
6-32 screw torque 6-8 in-lb (0.7 – 0.9N-m)
Environmental
Operating Temperature –25 to +60°C
Storage Temperature –40 to +75°C
Humidity (Non-condensing) 0 to 95%
Typical panel mount installation and
suggested wiring (user supplied)
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. © 2016 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/
DMS-20PC-4/5/6-DCM
Self-Powered LED Display, Negative Input
DC Voltage Monitor
MPM_DMS-20PC-4-DCM.D01 Page 2 of 2
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.
DMS-BZL3
Optional Bezel
0.75
(19.1)
#6-32
0.44
UNC THD
(11.2) 0.80
0.32
(20.3)
(8.1)
0.04
0.88
(1.016)
1.00
(22.4)
0.04
(25.4)
0.04
(1.016)
(1.016)
1.30
1.38
(33.0)
(35.1)
0.19
(4.8)
1.28
(32.5)
0.10
1.07
(2.5)
(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)
DMS-20PC-4-DCM
