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DMS-30LCDA-4/20 Series
Loop-Powered, 1.8V Drop, 4-20mA Process
DMS-30LCDA-4/20I (Inverse Reading)
The DMS-30LCDA-4/20I is designed to accommodate applications
Monitors with Full-Size LCD Displays
Examples (DMS-30LCDA-4/20I, Inverse Reading)
where an increasing loop current produces a decreasing display
reading. That is, as the loop current is increased from 4mA to 20mA,
the display will read a user determined full-scale positive number
1. Desired display readings are:
4mA = “6.00”
ON
at 4mA and then decrease to “000” at 20mA. The ‘4/20I’ model is
essentially a ‘-4/20S’ model operating in reverse. Table 5 and the
20mA = “0.00”
1
2
3
4
5
6
7
8
two examples that follow describe the operation of this model in
greater detail.
The ?rst step when con?guring the DMS-30LCDA-4/20I for the ?rst
Use DIP-switch setting #3 in Table 5 and enable decimal point DP2
via SW7. Apply 20mA and adjust R3 so the display reads “0.00.”
Apply 4mA and adjust R7 so the display reads “6.00.”
time, or when changing to a different range, is to set both R3 and
R7 to their full clockwise positions, roughly 22 turns. Next, using the
2. Desired display readings are:
4mA = “800”
ON
desired display readings, select the appropriate DIP-switch setting
number from Table 5.
20mA = “000”
1
2
3
4
5
6
7
8
Use DIP-switch setting #2 in Table 5. Apply 20mA and adjust R3 so
Table 5. DMS-30LCDA-4/20I (Inverse Reading) DIP Switch Settings
the display reads “000.” Apply 4mA and adjust R7 so the display
Desired Display Reading
4mA 20mA
SW1
SW2
SW3
SW4
SW5
reads “800.” For these display readings, no decimal points are used.
Set SW6, SW7 and SW8 to OFF.
1. 1999 to 1300
000
Off
Off
Off
Off
NA
2. 1300 to 850
3. 850 to 550
4. 550 to 350
000
000
000
On
Off
Off
Off
On
Off
Off
Off
On
Off
Off
Off
NA
NA
NA
Table 6. Decimal Point Selections (All Models)
To turn on a decimal point, place its respective DIP switch to the fully ON position.
5. 350 to 200
6. 200 to 130
000
000
On
On
On
On
On
On
Off
On
NA
NA
SW6
DP1
SW7
DP2
SW8
DP3
MECHANICAL SPECIFICATIONS
MECHANICAL DIMENSIONS: Inches (mm)
TOLERANCES:
WIRE SIZE:
STRIPPING LENGTH:
2 PL DEC ±0.02 (±0.51)
3 PL DEC ±0.010 (±0.254)
18 to 26 AWG
(Solid or stranded)
0.20" (5.08mm)
Back View
Zero
DIP
Adjust
R3
Switches
ON
1
Front View
Zero
Adjust
1
2
3
4
5
6
7
8
TB1
R7
Gain
Adjust
+
–
Gain
Adjust
+ –
Loop
Input
DP1
(SW6)
DP2
(SW7)
DP3
(SW8)
www.murata-ps.com/dpm
19 Jan 2011
email: sales@murata-ps.com
MPM_DMS30-LCDA.B05 Page 5 of 6
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