DMS-20LCD-4/20P-C Murata Power Solutions Inc, DMS-20LCD-4/20P-C Datasheet

DMS-20LCD-4/20P-C

Manufacturer Part Number

DMS-20LCD-4/20P-C

Description

Current Meter

Manufacturer

Murata Power Solutions Inc

Datasheet

1.DMS-20LCD-420P-C.pdf (6 pages)

Specifications of DMS-20LCD-4/20P-C

No. Of Digits / Alpha

3-1/2

Meter Function

Loop-Powered

Meter Range

4-20 MA

Digit Height

9.4mm

Supply Voltage Range

1.8-2 V

Operating Temperature Range

0Â°C To +60Â°C

Display Type

3 - 1/2 Digit LCD

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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FEATURES

■

www.murata-ps.com

SIMPLIFIED SCHEMATIC DIAGRAM

Super-low loop drop: 1.8V typical, 2.0V max.

Self-powered, no separate supply required

Unipolar, Bipolar, and Positive Reading Models

Subminiature package—Less than 0.90” behind-the-

panel depth

Large, 0.37"/9.4mm 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/readout combinations

Vibration-resistant package; reliable screw-terminal

input connections

www.murata-ps.com/rohs

For full details go to

+5V

REFERENCE

CONVERTER

BAND-GAP

ADJUST

CIRCUIT

DC/DC

ZERO

–5V

ADJUST

GAIN

www.murata-ps.com/dpm

priced, 4-20mA input, 3½ digit LCD-display process monitors: 1.8V typical, 2.0V max. This

super-low drop means its nominal loop resistance (burden) is less than 100 Ohms! All op-

erating power is derived solely from the 4-20mA loop current—no separate power source

is required! The simple 2-wire hookup allows the DMS-20LCD-4/20 Series to be connected

anywhere in the loop

switch featuring vibration-resistant, gold-plated contacts—there are no jumpers or solder

gaps to ever open or close. Both gain (span) and offset (zero) adjustments are performed

with precision, 20-turn potentiometers. Three different models are available for unipolar,

bipolar, and positive display reading applications. The DMS-20LCD-4/20’s DIP switch and

adjustment potentiometers can accommodate literally hundreds of different input-current/

output-reading combinations. And, connections to the current loop are made via a reliable,

two-position, screw-type terminal block.

high digits, LCD display that can be read in virtually all lighting conditions—including direct

sunlight. An optional bezel assembly, 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-20LCD-4/20 Series the perfect

meters for OEM 4-20mA current-loop process monitoring instrumentation.

The DMS-20LCD-4/20 Series produces the lowest loop voltage-drop of any comparably

The DMS-20LCD-4/20 Series’ subminiature package houses a large, 0.37"/9.4mm

All decimal-point and range-change selections are made via a six-position DIP

3½ DIGIT A/D

CONVERTER

CURRENT TO

CONVERTER

VOLTAGE

4-20mA Input Loop-Powered Ultra-Low 1.8V Loop Drop

DMS-20LCD-4/20 Series

DATA

Technical enquiries email: sales@murata-ps.com, tel:

DIP SWITCHES

3½ Digit LCD Display Process Monitors

DP1

DP2

LOOP INPUT

MPM_DMS20LCD-420.B03 Page 1 of 6

TB1

DP3

–

+1 508 339 3000

Related parts for DMS-20LCD-4/20P-C

DMS-20LCD-4/20P-C Summary of contents

Page 1

... Ohms! All op- erating power is derived solely from the 4-20mA loop current—no separate power source is required! The simple 2-wire hookup allows the DMS-20LCD-4/20 Series to be connected anywhere in the loop All decimal-point and range-change selections are made via a six-position DIP switch featuring vibration-resistant, gold-plated contacts— ...

Page 2

... Listed impedance speciﬁ cation applies at 20mA. Ordering Information DMS-20LCD-4/20S-C Unipolar reading, loop-powered LCD meter DMS-20LCD-4/20B-C Bipolar reading, loop-powered LCD meter DMS-20LCD-4/20P-C Positive reading, loop-powered LCD meter DMS-BZL3-C Bezel assembly DMS-BZL4-C Bezel assembly with sealing gasket DMS-20-CP Panel cutout punch A panel-mount retaining clip is supplied with each model ...

Page 3

... Example #3 below illustrates this concept. Please contact DATEL if there is any doubt as to whether or not the DMS-20LCD-4/20P can be conﬁ gured for your display readings requirements. www.murata-ps.com/dpm DMS-20LCD-4/20 Series 3½ Digit LCD Display Process Monitors 20mA and adjust R7 so the display reads "1.00". Apply 4mA and verify that the display reads " ...

Page 4

... The ﬁ rst step when conﬁ guring the DMS-20LCD-4/20P for the ﬁ rst time, or when selecting a new range set R3 fully counterclockwise and R7 fully clockwise (roughly 22 turns) to their minimum offset/minimum span posi- tions, 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

... Input Loop-Powered Ultra-Low 1.8V Loop Drop PROGRAMMABLE LOGIC CONTROLLER – (TB1-1) 4-20mA 4-20mA – (TB1-2) +24V ➀ Shown for illustrative purposes only, may not be present in all applications Figure 2. Typical DMS-20LCD-4/20 Connection Diagram 0.187 (4.75) 1.280 (32.51) 0.838 (21.29) 0.145 (3.68) 0.116 (2.95) www.murata-ps.com/dpm DMS-20LCD-4/20 Series 3½ ...

Page 6

... Tokyo, Tel: 81-3-3779-1031, email: japan@murata-ps.com Kyoto, Tel: 81-75-955-7269, email: japan@murata-ps.com Shanghai, Tel: +86 215 027 3678, email: shanghai@murata-ps.com Guangzhou, Tel: +86 208 221 8066, email: guangzhou@murata-ps.com Parkway Centre, Tel: +65 6348 9096, email: singapore@murata-ps.com Technical enquiries email: sales@murata-ps.com, tel: MPM_DMS20LCD-420.B03 Page 508 339 3000 ...

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