DMS-30LCDA-4/20 Series
Loop-Powered, 1.8V Drop, 4-20mA Process
Monitors with Full-Size LCD Displays
DMS-30LCDA-4/20I
(Inverse Reading)
The DMS-30LCDA-4/20I is designed to accommodate applications 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 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 two examples that follow describe the operation
of this model in greater detail.
The first step when configuring the DMS-30LCDA-4/20I for the first 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 desired display read-
ings, select the appropriate DIP-switch setting number from Table 5.
Table 5.
DMS-30LCDA-4/20I (Inverse Reading) DIP Switch Settings
Desired Display Reading
4mA
1.
1999 to 1300
2.
1300 to 850
3.
850 to 550
4.
550 to 350
5.
350 to 200
6.
200 to 130
20mA
000
000
000
000
000
000
SW1
Off
On
Off
Off
On
On
SW2
Off
Off
On
Off
On
On
SW3
Off
Off
Off
On
On
On
SW4
Off
Off
Off
Off
Off
On
SW5
NA
NA
NA
NA
NA
NA
Examples
(DMS-30LCDA-4/20I, Inverse Reading)
1. Desired display readings are:
4mA = “6.00”
20mA = “0.00”
1
2
3
4
5
6
7
8
ON
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”.
2. Desired display readings are:
4mA = “800”
20mA = “000”
1
2
3
4
5
6
7
8
ON
Use DIP-switch setting #2 in Table 5. Apply 20mA and adjust R3 so the
display reads “000”. Apply 4mA and adjust R7 so the display reads “800”.
For these display readings, no decimal points are used. Set SW6, SW7 and
SW8 to OFF.
Table 6.
Decimal Point Selections (All Models)
To turn on a decimal point, place its respective DIP switch to the fully ON position.
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)
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Back View
Zero
Adjust
DIP
Switches
ON
1
R3
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
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Front View
Technical enquiries
email: sales@murata-ps.com, tel:
+1 508 339 3000
MPM_DMS30-LCDA.B02
Page 5 of 6
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