www.murata-ps.com
DMS-30PC-4/20S
4-20mA Input 3½ Digit Panel Meters
with Full-Size LED Displays
FEATURES
■
■
■
■
■
■
■
■
■
Full-size, 0.56" (14.2mm), red or green LED's
Low-power or high-intensity LED's optional
Single +5V or optional +7.5-32V supply
+24V Isolated-power models
Low power consumption, 15mA from +5V
100Ω impedance, 2V loop drop
DIP-switch selectable range and decimal points
Hundreds of different input/readout combinations
Vibration-resistant package; Reliable screw-terminal
input connections
High-quality, 20-turn, gain/span and zero/offset adjust
potentiometers
Miniature size:
2.17" x 0.92" x 1.02"
55mm x 23mm x 27mm
The DMS-30PC-4/20S Series of 4-20mA current-loop-input, 3½ digit, LED display
panel meters offer an outstanding combination of electrical performance, display read-
ability, ease-of-use, and long-term reliability. Each of the 5 models features a large
(0.56"/14.2mm), red or green, LED display. Low-power or high-intensity red models are
optional. Power supplies can be a single +5V or an optional, wide-range +7.5-32V (24V
nominal). All DMS-30PC-4/20S meters are constructed using DATEL's super-reliable, field-
proven, epoxy-encapsulated DMS-30PC digital voltmeters. The entire assembly utilizes
100% soldered connections. These are the most rugged, 4-20mA input, panel meters in the
world.
Gain (span) and offset (zero) adjustments are both performed with high-precision,
20-turn potentiometers. All decimal point and range-change settings are made on a gold-
plated, vibration-resistant, DIP switch; there are no cumbersome solder gaps or jumpers
to contend with. Connections to the current loop and the power source are both made on a
rugged, four-position, screw-type terminal block.
The DMS-30PC-4/20S's user-friendly design accommodates virtually hundreds
of different input-current/output-reading combinations. This eliminates the majority of
requirements for more costly, long-lead-time, factory "specials"– especially in applications
requiring several different-range meters. A bezel assembly, featuring secure screw fasten-
ers and an EPDM rubber gasket, is available for applications requiring moisture and/or dust
resistance.
+5V
■
■
DMS-30PC-1
3½ DIGIT A/D
CONVERTER
DATA
R3
ZERO
ADJUST
R7
GAIN
ADJUST
DP1
DP2
DP3
BAND-GAP
REFERENCE
CIRCUIT
ON
+5V
1
2
3
4
5
6
7
N.C.
+5V
(SW1)
DIP
SWITCHES
VOLTAGE
CONVERTER
1
8
TB1
1
2
SG9
TB2
1
2
+
–
+
–
For full details go to
www.murata-ps.com/rohs
4-20mA
LOOP INPUT
➀
–V is not connected to meter ground
on ‘-I’ suffix models.
+V
–V
POWER SUPPLY
INPUT
www.murata-ps.com/dpm
24 Mar 2011
email: sales@murata-ps.com
MPM_DMS-30PC-420S.B04
Page 1 of 4
DMS-30PC-4/20S
4-20mA Input 3½ Digit Panel Meters
with Full-Size LED Displays
Performance/Functional Specifications
Typical at T
A
= +25°C, unless otherwise noted.
Current Loop Input
Full Scale Input Range
Input Impedence
Voltage Drop
Overcurrent Protection
Performance
Sampling Rate
Accuracy (1 minute warm-up)
Temperature Drift
Power Supply Requirements
DMS-30PC-4/20S-5RS
DMS-30PC-4/20S-5GS
DMS-30PC-4/20S-5RH
DMS-30PC-4/20S-5RL
DMS-30PC-4/20S-24RL
DMS-30PC-4/20S-24XX-I (models)
Display
Display Type and Size
Polarity Indication
Overrange Indication
Physical/Environmental
Operating Temperature
Storage Temperature
Humidity (non-condensing)
Case Material
Weight
0
–40
0
–
–
–
+60
+75
95
°C
°C
%
3½ digit, 0.56"/14.2mm high LED
"–" for negative readings
"–1_ _ _ " for negative inputs
"1_ _ _ " for positive inputs
+4.75 to +5.25Vdc at 225mA max.
+4.75 to +5.25Vdc at 225mA max.
+4.75 to +5.25Vdc at 225mA max.
+4.75 to +5.25Vdc at 20mA max.
+7.5 to +32Vdc at 30mA max.
+21.6 to +26.4Vdc at 60mA max.
–
2.5 reading per second
±0.05%FS ±1 Count
±0.15
±0.3
Cnts/°C
Min.
+3.5
–
–
–
Typ.
–
100
–
±0.15
Max.
+22
–
2.0
±0.3
Units
mA
Ohms
Volts
mA
DMS-30PC-4/20S-5RS-C
DMS-30PC-4/20S-5GS-C
DMS-30PC-4/20S-5RL-C
DMS-30PC-4/20S-5RH-C
DMS-30PC-4/20S-24RL-C
DMS-30PC-4/20S-24RS-
I
-C
DMS-30PC-4/20S-24RH-
I
-C
DMS-30PC-4/20S-24BS-
I
-C
DMS-30PC-4/20S-24GS-
I
-C
ACCESSORIES
DMS-BZL1-C
DMS-BZL2-C
DMS-30-CP
+5V supply, standard-intensity red LED's
+5V supply, standard-intensity green LED's
+5V supply, low-power red LED's
+5V supply, high-intensity red LED's
+7.5V to +32V supply, low-power red LED's
+24V isolated supply, standard-intensity
red LED’s
+24V isolated supply, high-intensity red LED’s
+24V isolated supply, high-intensity blue LED’s
+24V isolated supply, standard-intensity
green LED’s
Ordering Information
Panel-mount bezel assembly
Panel-mount bezel with sealing gasket
Panel cutout punch
A panel-mount retaining clip is supplied with each model.
DIP-Switch Settings Table
➁
Display Reading
1.
2.
3.
4.
5.
6.
7.
000 to 100-300
000 to 400-600
000 to 700-1999
±100
±200 to ±300
±400 to ±600
±700 to ±1999
SW1
On
Off
On
On
On
On
Off
SW2
On
On
Off
On
On
Off
Off
SW3
On
Off
Off
On
Off
Off
Off
SW4
Off
Off
Off
Off
Off
Off
On
Polycarbonate
1 ounces (28 grams)
➁
When looking up DIP-switch settings in the Table and the desired display read-
ings happen to fall between two switch settings, try performing the adjustments
with both settings to determine which one offers the better settability. Please
keep in mind that the DMS-30PC meter (from which the DMS-30PC-4/20S is
derived) has an accuracy specification of ±2 counts (max.). Thus, it may not
always be possible to obtain the exact desired display reading.
➀
Input Grounding:
Except for the "-I"suffix models which feature isolated current
loop inputs, all other DMS-30PC-4/20S meters are supplied with their 4-20mA
negative-input terminals (TB1-2, "-") internally connected to their power supply
ground terminal (TB2-2, “-V”). This single-ended input configuration is compatible
with most grounded-referenced 4-20mA transmitters.
Applications in which the DMS-30PC-4/20S and its associated 4-20mA
transmitter are connected to a common ground and the transmitter drives two or
more loads (for example, the meter in series with a PLC) must have the meter
connected as the
first
device in the current loop, that is, closest to the system
ground (see Figure 2). If this is not possible and/or the meter must be connected
in the middle of the current loop, then'-I' suffix models
must be used
to provide
the required isolation between the meter’s current loop input and the power sup-
ply ground ("-V"). See Figures 2, 3, 4, and 5 for typical loop connections.
OPERATING AND SETUP INSTRUCTIONS
As shipped, the DMS-30PC-4/20S is factory calibrated to read "000"
for a 4mA input and "1999" for a 20mA input. The following worst-case
procedure assumes the DMS-30PC-4/20S is completely mis-adjusted,
i.e., both potentiometers and the DIP switches are randomly set.
1.
Set R7 (gain/span adjust) and R3 (zero/offset adjust) fully clockwise,
roughly 20 turns, and place SW1-SW8 to OFF (down position).
2.
Set SW1 to ON (up position). See DIP switch setting #3.
3.
Apply a precision 4mA input, with proper polarity, and adjust R3 until
the meter's display reads "000".
4.
Apply a precision 20mA and adjust R7 until the display reads "1999".
Repeat 3 and 4 to make sure adjustments do not affect one another.
5.
If desired, select the appropriate decimal point by setting either SW5,
SW6 or SW7 to ON (DP1, DP2 or DP3 respectively).
NOTE:
If a display reading other than "000" to "1999" is desired,
refer to the DIP-Switch Settings Table for SW1-SW4 settings.
www.murata-ps.com/dpm
24 Mar 2011
email: sales@murata-ps.com
MPM_DMS-30PC-420S.B04
Page 2 of 4
DMS-30PC-4/20S
4-20mA Input 3½ Digit Panel Meters
with Full-Size LED Displays
Examples
1.
Desired display readings are:
4mA ="0.00"
20mA = "2.00"
1
2
3
4
ON
+24V
+
(TB1-1)
+V (TB2-1)
+
DMS-30PC-4/20S-24RL
5
6
7
8
Use DIP-switch setting #1 and enable decimal point DP2 via SW6.
Apply 4mA and adjust R3 so the display reads "0.00". Apply 20mA and
adjust R7 so the display reads "2.00".
2.
Desired display readings are:
4mA = "–100"
12mA = "000"
20mA = "100"
ON
LOOP-POWERED
TRANSMITTER
–
4-20mA
N.C.
(TB1-2)
–
–V (TB2-2)
24V GROUND
Figure 3. Typical Connections for Loop-Powered Transmitters
Driving Single-Ended Meters.
5
6
7
8
+24V
+V (TB2-1)
DMS-30PC-4/20S-24RL-I
(TB2-2)
–V
1
2
3
4
Use DIP-switch setting #4. Apply 12mA and adjust R3 so the display
reads "000". Apply 20mA and adjust R7 so the display reads "100".
Apply 4mA and the display should read "–100". For these display read-
ings, no decimal points are used. Set SW5, SW6 and SW7 to OFF.
+
3.
Desired display readings are:
4mA = ".000"
12mA = ".250"
1
2
3
4
ON
SINGLE-ENDED
TRANSMITTER
+
5
6
7
8
+
(TB1-1)
4-20mA
(TB1-2)
–
+
PLC or OTHER
SINGLE-ENDED
DEVICE
This example is not as straightforward as the previous two. Notice that
12mA is exactly halfway between 4mA and 20mA. If we assume the
input could go up to 20mA, the display reading would be: 2 x .250 or
".500". From the table, we can select DIP-switch setting #2 and enable
DP1 via SW5. Apply 4mA and adjust R3 so the display reads ".000".
Apply 12mA and adjust R7 so the display reads ".250".
+24V
–
24V GROUND
4-20mA
–
Figure 4. Typical Connections for Isolated-Supply Meters
in Series with an Auxiliary Device
+5V
+
+V (TB2-1)
CONNECTION DIAGRAMS
LOOP
TRANSMITTER
+24V
+
(TB1-1)
4-20mA
+
DMS-30PC-4/20S-24RL
–
+
+
(TB1-1)
4-20mA
+V (TB2-1)
(TB1-2)
–
–V (TB2-2)
5V GROUND
+
DMS-30PC-4/20S-24RL
24V GROUND
SINGLE-ENDED
TRANSMITTER
–
24V GROUND
(TB1-2)
–
–V (TB2-2)
Figure 5. Typical Connections for +5V Powered Meters. Note that 5V Ground
and 24V Ground are Tied Together Inside the Meter.
Figure 2. Typical Connections for Single-Ended Transmitters Driving
Single-Ended +24V Powered Meters.
DMS-30PC-4/20S-24XX-I
Figure 6. Typical Connections for Loop-Powered Transmitters
Driving Isolated-Supply Meters (-I part number suffix).
www.murata-ps.com/dpm
24 Mar 2011
email: sales@murata-ps.com
MPM_DMS-30PC-420S.B04
Page 3 of 4
DMS-30PC-4/20S
4-20mA Input 3½ Digit Panel Meters
with Full-Size LED Displays
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)
1.33
(33.8)
1
1.02
(25.9)
0.040
(1.02)
2.09
(53.09)
2.17
(55.12)
Zero/Offset
Adjust
DIP
Switches
ON
1 Depth dimension for the DMS-30PC-4/20S-24RL model only.
Back View
12
R3
Zero
Adjust
D1
R10
1
SW1
R12
R6
1
2
3
4
5
6
7
8
SG10
R9
R1 R8
TB1
+
–
TB2
+
–
U2
R7
Gain
Adjust
SG9
1
R5 R4 R2
2
1
2
Gain/Span
Adjust
+ – + –
Loop
Input
Power
Input
DP1
(SW5)
DP2
(SW6)
OPTIONAL BEZEL (DMS-BZL1 and DMS-BZL2)
#2-56 INSERT
0.156 (3.96) DEEP
0.187
(4.75)
FRONT VIEW
2.55 (64.77)
BEZEL
RECOMMENDED DRILL AND PANEL CUTOUT DIMENSIONS
INTERNAL CORNER RADII:
0.032 (0.81) MAX.
0.116
(2.95)
RETAINING CLIP INSTALLATION
1.07
(27.18)
PANEL CUTOUT
0.878
(22.30)
2.118 (53.80)
®
®
2.35 (59.69)
0.093 (2.362) DIAMETER (4 REQUIRED)
ONLY WHEN USING OPTIONAL BEZEL ASSEMBLY
0.096
(2.44)
A panel-mount retaining clip is supplied with all models
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without
notice.
© 2011 Murata Power Solutions, Inc.
www.murata-ps.com/locations
24 Mar 2011
email: sales@murata-ps.com
MPM_DMS-30PC-420S.B04
Page 4 of 4
®
®
MADE IN USA
MADE IN USA
1.270
(32.26)
DMS-30PC-4/20S
DP3
(SW7)
®
®
MADE IN USA
0.04
(1.02)
0.84
(21.34)
0.92
(23.37)
Front View
PANEL
OPTIONAL
GASKET
PANEL
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