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DMS-30LCDA-4/20 Series
Loop-Powered, 1.8V Drop, 4-20mA Process
Monitors with Full-Size LCD Displays
Murata Power Solution’s new DMS-30LCDA-4/20 Series’ 1.8V nominal loop-drop is the
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Super-low loop drop: 1.8V typical, 2.0V max.
Self-powered 2-wire operation; no separate
supply required
Unipolar, Bipolar, Positive, and Inverse Reading Models
Subminiature package; Less than 0.90"
behind-the-panel depth
Large, 0.40"/10.2mm high, sunlight-viewable LCD display
Non-interacting gain (span) and offset (zero)
20-turn potentiometers
DIP-switch selectable range and decimal points
Hundreds of different input-current/readout combinations
Vibration-resistant package; reliable
screw-terminal input connections
lowest of any comparably priced, 4-20mA input, 3?-digit process monitors with full-size
LCD displays. This super-low loop-drop guarantees a maximum burden of no more than
100 Ohms! And because it’s loop-powered, all operating power is derived directly from the
loop current itself; no separate power source is required! Their ?oating 2-wire design allows
DMS-30LCDA-4/20 Series process monitors to be connected anywhere in the current loop.
All decimal point and range-change selections are made via an eight-position DIP switch
which features vibration-resistant, gold-plated contacts—there are no cumbersome jumpers
or solder gaps to contend with. Both gain (span) and offset (zero) adjustments are performed
using 20-turn, non-interacting potentiometers. Four different models accommodate unipolar,
bipolar, positive, and inverse display-reading applications. The DMS-30LCDA-4/20 Series’
DIP switch and adjustment potentiometers can accommodate literally hundreds of different
input-current/output-reading combinations.
DMS-30LCDA-4/20 Series’ subminiature package houses a large, 0.40”/10.2mm, high-
contrast LCD display that can be read in virtually all lighting conditions—including full sunlight!
The two connections to the external loop are made via a reliable screw-type terminal block. For
environmentally demanding applications, an optional panel-mount bezel assembly, featuring
screw fasteners and a rubber gasket, provides excellent resistance to dust and moisture. All
these outstanding features combine to make the new DMS-30LCDA-4/20 Series ideal for all
your 4-20mA process-monitoring instrumentation needs.
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D A T A
C O N V E R T E R
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A D J U S T
B A N D -G A P
R E F E R E N C E
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G A IN
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D P 1
D IP S W IT C H E S
D P 2
D P 3
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T B 1
　
For full details go to
D C /D C
C O N V E R T E R
C U R R E N T T O
V O L T A G E
C O N V E R T E R
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www.murata-ps.com/rohs
Figure 1. DMS-30LCDA-4/20 Simpli?ed Schematic
L O O P IN P U T
www.murata-ps.com/dpm
19 Jan 2011
email: sales@murata-ps.com
MPM_DMS30-LCDA.B05 Page 1 of 6
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