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www.murata-ps.com
FEATURES
■
Industry's fi rst loop-powered meter with a large,
easy-to-read, LED display!
■
Self-powered, no external supply required
■
Unipolar, Bipolar and Positive Reading Models
■
Large, 0.37"/9.4mm digits
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Excellent display intensity
■
High-quality, 20-turn, span (gain) and zero (offset)
adjustments
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DIP-switch selectable range and decimal points
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Hundreds of input/readout combinations
■
Vibration-resistant package; Reliable screw-terminal
input connections
SIMPLIFIED SCHEMATIC DIAGRAM
For full details go to
www.murata-ps.com/rohs
The DMS-20PC-4/20 Series are the world's fi rst 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 diffi cult-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, simplifi es 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
GAIN
ZERO
ADJUST
ADJUST
BAND-GAP
REFERENCE
CIRCUIT
+5V
–5V
DC/DC
CONVERTER
www.murata-ps.com/dpm
DMS-20PC-4/20 Series
Subminiature 4-20mA Loop-Powered
3½ DIGIT A/D
DATA
CONVERTER
1
2
3
ON
DIP SWITCHES
1
2
3
4
5
6
CURRENT TO
VOLTAGE
CONVERTER
29 Mar 2011 MPM_DMS20PC-4/20.C05 Page 1 of 6
3½ Digit LED Process Monitors
DP1
DP2
DP3
TB1
+
–
+
–
LOOP INPUT
email: sales@murata-ps.com
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Table of Contents
Related Manuals for Datel Murata DMS-20PC-4/20 Series
Summary of Contents for Datel Murata DMS-20PC-4/20 Series
- Page 1 DMS-20PC-4/20 Series www.murata-ps.com Subminiature 4-20mA Loop-Powered 3½ Digit LED Process Monitors FEATURES The DMS-20PC-4/20 Series are the world's fi rst loop-powered digital panel meters with a large, easy-to-read, bright red, LED display. All operating power is derived ■ Industry's fi rst loop-powered meter with a large, directly from the loop current itself—no external power supply is required! The large, easy-to-read, LED display! 0.37"/9.4mm digits exhibit uniform intensity over the entire 4-20mA operating range.
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Page 2: Operating And Setup Instructions
±40mA without sustaining any damage. 1. 000 to 1050-1999 ➁ Because DATEL's DMS-4/20 loop-powered meters employ active circuitry to 2. 000 to 650-1350 convert the loop current into a voltage, the meters' effective series impedance 3. -
Page 3: Display Reading
4mA inputs, that is, R3’s clockwise adjustment-range is reduced. 1. –600 to –1000 600 to 1000 Example #3 below illustrates this concept. Please contact DATEL if there 2. –350 to –650 350 to 650 is any doubt as to whether or not the DMS-20PC-4/20P can be confi gured 3. - Page 4 DMS-20PC-4/20 Series Subminiature 4-20mA Loop-Powered 3½ Digit LED Process Monitors fully clockwise (roughly 22 turns) to their minimum offset/minimum span Table 4. Decimal Point Settings positions, respectively. The next step is to calculate the required display differential-reading; this is accomplished by subtracting the desired 4mA display reading from the desired 20mA display reading, disregarding decimal points.
- Page 5 DMS-20PC-4/20 Series Subminiature 4-20mA Loop-Powered 3½ Digit LED Process Monitors PROGRAMMABLE ➀ LOGIC CONTROLLER TRANSMITTER & DMS-20PC-4/20 SIGNAL CONDITIONER – GAIN (TB1-1) TRANSDUCER 4-20mA INPUT Vsig 4-20mA – – – (TB1-2) ZERO +24V ➀ Shown for illustrative purposes only, may not be present in all applications +24Vdc 85-264Vac SUPPLY...
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Page 6: Mechanical Specifications
DMS-20PC-4/20 Series Subminiature 4-20mA Loop-Powered 3½ Digit LED Process Monitors MECHANICAL SPECIFICATIONS MECHANICAL DIMENSIONS: Inches (mm) TOLERANCES: 2 PL DEC ±0.02 (±0.51) 3 PL DEC ±0.010 (±0.254) WIRE SIZE: 18 to 26 AWG (Solid or stranded) STRIPPING LENGTH: 0.20" (5.08mm) 0.95 (24.1) 0.040...
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