DMS-20PC-4 Datasheet, PDF (1/6 Pages) Murata Power Solutions Inc. – Subminiature 4-20mA Loop-Powered 3½ Digit LED Process Monitors

DMS-20PC-4/20 Series
Subminiature 4-20mA Loop-Powered
3½ Digit LED Process Monitors
FEATURES
N _{Industry's first loop-powered meter with a large,}
easy-to-read, LED display!
N _{Self-powered, no external supply required}
N _{Unipolar, Bipolar and Positive Reading Models}
N _{Large, 0.37"/9.4mm digits}
N _{Excellent display intensity}
N _{High-quality, 20-turn, span (gain) and zero (offset)}
adjustments
N _{DIP-switch selectable range and decimal points}
N _{Hundreds of input/readout combinations}
N _{Vibration-resistant package; Reliable screw-terminal}
input connections
SIMPLIFIED SCHEMATIC DIAGRAM
The DMS-20PC-4/20 Series are the world's first loop-powered digital panel meters
with a large, easy-to-read, bright red, LED display. All operating power is derived
directly from the loop current itself—no external power supply is required! The large,
0.37"/9.4mm digits exhibit uniform intensity over the entire 4-20mA operating range.
Additionally, the total maximum loop voltage drop is only 5V! Users no longer have to settle
for difficult-to-read LCD displays in loop-powered applications.
Both gain (span) and offset (zero) adjustments are performed with on-board, precision,
20-turn potentiometers. All decimal-point and range-change selections are made on a six-
position DIP switch featuring vibration-resistant, gold-plated contacts. Unlike competitive
meters, there are no jumpers or solder gaps to open or close. Connections to the current
loop are made via a reliable, two-position, screw-type
terminal block.
The DMS-20PC-4/20's DIP switch and adjustment potentiometers accommodate
hundreds of different input-current/output-reading combinations. This versatility practically
eliminates the need to order more costly, long-lead-time, factory-customized "specials" in
applications in which several different-range meters are required. An optional bezel assem-
bly, featuring screw fasteners and a rubber seal, simplifies panel mounting and provides
excellent resistance to environmental dust and moisture. All these outstanding features
combine to make the DMS-20PC-4/20 Series the perfect meters for prototype and OEM
4-20mA current-loop instrumentation.
R3
R7
ZERO GAIN
ADJUST ADJUST
BAND-GAP
REFERENCE
CIRCUIT
3½ DIGIT A/D
CONVERTER
123
DATA
DP1 DP2 DP3
ON
123456
DIP SWITCHES
Ḥ
For full details go to
www.murata-ps.com/rohs
+5V
–5V
DC/DC
CONVERTER
CURRENT TO
VOLTAGE
CONVERTER
TB1
+–
+–
LOOP INPUT
www.murata-ps.com
Technical enquiries email: [e-mail], tel: [phone]
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