DMS-20LCD-4/20B-C Murata Power Solutions Inc, DMS-20LCD-4/20B-C Datasheet - Page 2

• Manufacturer Part Number: DMS-20LCD-4/20B-C
• Description: 4-20mA LCD Loop-Power 3.5 Dig
• Manufacturer: Murata Power Solutions Inc

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

• Display Type: 3 - 1/2 Digit LCD
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

➀ The DMS-20LCD-4/20, using any of the DIP-switch settings described above,
➁ Because DATEL's DMS-4/20 loop-powered meters employ active circuitry to
OPERATING AND SETUP INSTRUCTIONS
DMS-20LCD-4/20S (Unipolar Reading Model)
As shipped, the DMS-20LCD-4/20S is factory calibrated to read "000"
for a 4mA input and "1000" for a 20mA input. The following worst-case
procedure assumes the DMS-20LCD-4/20S is completely mis-adjusted,
i.e., both potentiometers and the DIP switches are randomly set. When
Performance/Functional Specifi cations
Typical at T
Current Loop Inputs
Full Scale Input Range ➀
Input Impedence ➁
Voltage Drop ➁
Overvoltage Protection ➀
Performance
Sampling Rate
Accuracy (1 minute warm-up):
Temperature Drift (0 = +60°C)
Display
Display Type and Size
Polarity Indication
Overrange Indication
Physical/Environmental
Operating Temperature
Storage Temperature
Humidity (non-condensing)
Case Material
Weight
Ordering Information
DMS-20LCD-4/20S-C
DMS-20LCD-4/20B-C
DMS-20LCD-4/20P-C
DMS-BZL3-C
DMS-BZL4-C
DMS-20-CP
A panel-mount retaining clip is supplied with each model.
can withstand overcurrents, including those resulting from accidental reverse-
polarity connections, up to ±40mA without sustaining any damage.
convert the loop current into a voltage, the meters' effective series impedance
varies in a manner that maintains the loop voltage drop constant over the full
4-to-20mA current range. Listed impedance specifi cation applies at 20mA.
A
= +25°C, unless otherwise noted.
Unipolar reading, loop-powered LCD meter
Bipolar reading, loop-powered LCD meter
Positive reading, loop-powered LCD meter
Bezel assembly
Bezel assembly with sealing gasket
Panel cutout punch
Min.
+3.8
–20
–
–
–
–
0
0
3½ digit, 0.37"/9.4mm high LCD
"–1_ _ _ " for negative inputs
"1_ _ _ " for positive inputs
"–" for negative readings
2.5 reading per second
0.6 ounces (17 grams)
±0.05%FS ±1 Count
www.murata-ps.com/dpm
±0.15
Typ.
Polycarbonate
1.8
80
–
–
–
–
–
Max.
+20.4
±0.3
100
±40
+60
+75
2.0
95
Cnts/°C
Units
Ω
Volts
mA
mA
°C
°C
%
4-20mA Input Loop-Powered Ultra-Low 1.8V Loop Drop
Examples (DMS-20LCD-4/20S-Unipolar Model)
1. Desired display readings are:
2. Desired display readings are:
3. Desired display readings are:
performing DIP-switch settings, be sure the DIP switch's small actuators
are fi rmly engaged in their fully-ON or fully-OFF positions.
1. Set R7 (full scale span/gain adjust) and R3 (zero/offset adjust) fully
2. Select DIP switch setting #2.
1. Set R7 (full scale span/gain adjust) and R3 (zero/offset adjust) fully
2. Select DIP switch setting #2.
3. Apply a precision 4mA input, with proper polarity, and adjust R3 until
4. Apply a precision 20mA input and adjust R7 until the meter's display
5. Select the appropriate decimal point by setting SW4, SW5 or SW6 to
Use DIP-switch setting #3 in Table 1 and enable decimal point DP2 via
SW5. Apply 4mA and adjust R3 so the display reads "0.00". Apply
20mA and adjust R7 so the display reads "6.00".
Use DIP-switch setting #2 in Table 1. Apply 4mA and adjust R3 so the
display reads "000". Apply 20mA and adjust R7 so the display reads
"800". For these display readings, no decimal points are used. Set
SW4, SW5 and SW6 to OFF.
This example is not as straightforward as the previous two. Notice that
12mA is exactly halfway between 4mA and 20mA. If we assume that
the input could go up to 20mA, the display reading would then be: 2
x .250 or ".500". From Table 1 we can now select DIP-switch setting
#4 and enable DP1 via SW4. Apply 4mA and adjust R3 so the display
reads ".000". Apply 12mA and adjust R7 so the display
reads ".250".
clockwise, roughly 22 turns, and place SW1-SW6 to OFF.
clockwise, roughly 22 turns, and place SW1-SW6 to OFF.
the meter's display reads "000".
reads "1000". Repeat steps 3 and 4 to make sure the adjustments do
not affect one another.
ON (DP1, DP2 or DP3 respectively).
NOTE: If a display reading other than "000" to "1000" is desired,
refer to DIP–Switch Settings Table 1 for SW1–SW3 settings.
DMS-20LCD-4/20 Series
4mA ="0.00"
20mA = "6.00"
4mA = "000"
20mA = "800"
4mA = ".000"
12mA = ".250"
Technical enquiries email: [e-mail], tel:
3½ Digit LCD Display Process Monitors
MPM_DMS20LCD-420.B03 Page 2 of 6
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