The DMS-30PC-4/20S Series of 4-20mA current-loop-input, 3 digit, LED display
panel meters offer an outstanding combination of electrical performance, display
readability, ease-of-use, and long-term reliability. Each of the 5 models features a
large (0.56"/14.2mm), red, blue 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 fasteners and an EPDM rubber gasket, is available for applications
requiring moisture and/or dust resistance.
4-20mA Input
3 Digit Panel Meters
with Full-Size LED Displays
Figure 1. DMS-30PC-4/20S Simplified Schematic
Features
Full-size, 0.56" (14.2mm), red , blue 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
100
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
DMS-30PC-4/20S
V is not connected to meter ground
on `-I' suffix models.
DATEL, Inc., Mansfield, MA 02048 (USA)
Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356 E-mail: sales@datel.com Internet: www.datel.com
New +24V Isolated-Power Models
D A T A
3 D I G I T A / D
C O N V E R T E R
B A N D - G A P
R E . E R E N C E
C I R C U I T
( S W 1 )
D I P
S W I T C H E S
D P 3
D P 2
D P 1
R 3
Z E R O
A D J U S T
R 7
G A I N
A D J U S T
N . C .
5
6
7
8
1
2
3
4
O N
+ 5 V
D M S - 3 0 P C - 1
+ V
T B 2
4 - 2 0 m A
L O O P I N P U T
+
T B 1
V
1
2
P O W E R S U P P L Y
I N P U T
+
1
2
S G 9
+ 5 V
V O L T A G E
C O N V E R T E R
+ 5 V
1
Order on-line at
www.datel.com
Now available with
brilliant blue LED's!
DATEL, Inc., Mansfield, MA 02048 (USA)
Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356 E-mail: sales@datel.com Internet: www.datel.com
2
3 D I G I T , 4 - 2 0 m A I N P U T , L E D D I S P L A Y M E T E R S
DMS-30PC-4/20S
1. Desired display readings are:
4mA ="0.00"
20mA = "2.00"
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".
Examples
Performance/Functional Specifications
Typical at T
A
= +25C, unless otherwise noted.
Display Reading
SW1
SW2
SW3
SW4
1. 000 to 100-300
On
On
On
Off
2. 000 to 400-600
Off
On
Off
Off
3. 000 to 700-1999
On
Off
Off
Off
4. 100
On
On
On
Off
5. 200 to 300
On
On
Off
Off
6. 400 to 600
On
Off
Off
Off
7. 700 to 1900
Off
Off
Off
On
DIP-Switch Settings Table
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
supply ground ("-V"). See Figures 2, 3, 4, and 5 for typical loop connections.
When looking up DIP-switch settings in the Table and the desired display
readings happen to fall between two switch settings, try performing the
adjustments with both settings to determine which one offers the better
DMS-30PC-4/20S-5RS
+5V supply, standard-intensity red LED's
DMS-30PC-4/20S-5GS
+5V supply, standard-intensity green LED's
DMS-30PC-4/20S-5RL
+5V supply, low-power red LED's
DMS-30PC-4/20S-5RH
+5V supply, high-intensity red LED's
DMS-30PC-4/20S-24RL
+7.5V to +32V supply, low-power red LED's
DMS-30PC-4/20S-24RS-
I
+24V isolated supply, standard-intensity
red LED's
DMS-30PC-4/20S-24RH-
I
+24V isolated supply, high-intensity red LED's
DMS-30PC-4/20S-24BS-
I
+24V isolated supply, high-intensity blue LED's
DMS-30PC-4/20S-24GS-
I
+24V isolated supply, standard-intensity
green LED's
DMS-PS4-CM
+24V/0.45A AC/DC power supply module
DMS-PS7-CM
+24V/0.7A AC/DC power supply module
DMS-BZL1
Panel-mount bezel assembly
DMS-BZL2
Panel-mount bezel with sealing gasket
DMS-30-CP
Panel cutout punch
Ordering Information
A panel-mount retaining clip is supplied with each model.
Current Loop Input
Min.
Typ.
Max.
Units
Full Scale Input Range
+3.5
--
+22
mA
Input Impedance
--
100
--
Voltage Drop
--
--
2.0
Volts
Overcurrent Protection
--
--
40
mA
Performance
Sampling Rate
2.5 readings per second
Accuracy (1 minute warm-up)
0.05%FS 1 Count
Temperature Drift (0 to +60C)
--
0.15
0.3
Cnts/C
Power Supply Requirements
DMS-30PC-4/20S-5RS
+4.75 to +5.25Vdc at 225mA max.
DMS-30PC-4/20S-5GS
+4.75 to +5.25Vdc at 225mA max.
DMS-30PC-4/20S-5RH
+4.75 to +5.25Vdc at 225mA max.
DMS-30PC-4/20S-5RL
+4.75 to +5.25Vdc at 20mA max.
DMS-30PC-4/20S-24RL
+7.5 to +32Vdc at 30mA max.
DMS-30PC-4/20S-24XX-
I
Models
+21.6 to +26.4Vdc at 60mA max.
Display
Display Type and Size
3 digit LED, 0.56"/14.2mm high
Polarity Indication
"" for negative readings
Overrange Indication
"1_ _ _ " for negative inputs
"1_ _ _ " for positive inputs
Physical/Environmental
Operating Temperature
0
--
+60
C
Storage Temperature
40
--
+75
C
Humidity (Non-condensing)
0
--
95
%
Case Material
Polycarbonate
Weight
1 ounce (28 grams)
Order on-line at www.datel.com
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.
O N
O N
1
1
1
2
3
4
5
6
7
8
2
3
4
5
6
7
8
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.
DATEL, Inc., Mansfield, MA 02048 (USA)
Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356 E-mail: sales@datel.com Internet: www.datel.com
3
3 D I G I T , 4 - 2 0 m A I N P U T , L E D D I S P L A Y M E T E R S
DMS-30PC-4/20S
2. Desired display readings are:
4mA = "100"
12mA = "000"
20mA = "100"
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 readings, no decimal points are used. Set SW5, SW6 and
SW7 to OFF.
Figure 2. Typical Connections for Single-Ended Transmitters Driving
Single-Ended +24V Powered Meters.
Figure 3. Typical Connections for Loop-Powered Transmitters
Driving Single-Ended Meters.
CONNECTION DIAGRAMS
D M S - 3 0 P C - 4 / 2 0 S - 2 4 R L
+
+ V
2 4 V G R O U N D
S I N G L E - E N D E D
T R A N S M I T T E R
+ 2 4 V
4 - 2 0 m A
( T B 1 - 2 )
( T B 1 - 1 )
( T B 2 - 1 )
V
( T B 2 - 2 )
+
+
D M S - 3 0 P C - 4 / 2 0 S - 2 4 R L
+
+ V
2 4 V G R O U N D
L O O P - P O W E R E D
T R A N S M I T T E R
+
+ 2 4 V
4 - 2 0 m A
N . C .
( T B 1 - 1 )
( T B 2 - 1 )
V
( T B 2 - 2 )
( T B 1 - 2 )
O N
O N
1
1
1
2
3
4
5
6
7
8
2
3
4
5
6
7
8
O N
O N
1
1
1
2
3
4
5
6
7
8
2
3
4
5
6
7
8
D M S - 3 0 P C - 4 / 2 0 S - 2 4 R L - I
+ V
( T B 2 - 1 )
+
S I N G L E - E N D E D
T R A N S M I T T E R
+ 2 4 V
4 - 2 0 m A
( T B 1 - 1 )
2 4 V G R O U N D
P L C o r O T H E R
S I N G L E - E N D E D
D E V I C E
+
+
+
( T B 1 - 2 )
V
( T B 2 - 2 )
4 - 2 0 m A
Figure 5. Typical Connections for +5V Powered Meters. Note that 5V Ground
and 24V Ground are Tied Together Inside the Meter.
Figure 4. Typical Connections for Isolated-Supply Meters
in Series with an Auxiliary Device
D M S - 3 0 P C - 4 / 2 0 S - 2 4 R L
+
+ V
5 V G R O U N D
L O O P
T R A N S M I T T E R
+
+
+ 2 4 V
4 - 2 0 m A
( T B 1 - 1 )
( T B 2 - 1 )
V
( T B 2 - 2 )
( T B 1 - 2 )
2 4 V G R O U N D
+ 5 V
3. Desired display readings are:
4mA = ".000"
12mA = ".250"
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".
Mechanical Specifications
MECHANICAL DIMENSIONS: Inches (mm)
TOLERANCES:
2 PL DEC 0.02 (0.51)
3 PL DEC 0.010 (0.254)
WIRE SIZE:
18 to 26 AWG
(Solid or stranded)
STRIPPING LENGTH:
0.20" (5.08mm)
Gain/Span
Adjust
Zero/Offset
Adjust
+
Loop
Input
Back View
Front View
+
Power
Input
#2-56 INSERT
0.156 (3.96) DEEP
FRONT VIEW
1.270
(32.26)
0.187
(4.75)
OPTIONAL BEZEL (DMS-BZL1 and DMS-BZL2)
2.35 (59.69)
2.118 (53.80)
0.093 (2.362) DIAMETER (4 REQUIRED)
ONLY WHEN USING OPTIONAL BEZEL ASSEMBLY
RECOMMENDED DRILL AND PANEL CUTOUT DIMENSIONS
INTERNAL CORNER RADII:
0.032 (0.81) MAX.
1.07
(27.18)
0.878
(22.30)
0.096
(2.44)
0.116
(2.95)
2.55 (64.77)
PANEL CUTOUT
M
A
D
E
IN
U
S
A
B E Z E L I N S T A L L A T I O N
P A N E L
B E Z E L
O P T I O N A L
G A S K E T
MA
DE IN
USA
RETAINING CLIP INSTALLATION
PANEL
MA
DE IN
USA
DMS-
30PC-
4/2
0S
0.92
(23.37)
0.84
(21.34)
0.040
(1.02)
1.02
(25.9)
2.17
(55.12)
2.09
(53.09)
0.04
(1.02)
1.33
(33.8)
1
1 Depth dimension for the DMS-30PC-4/20S-24RL model only.
DP2
(SW6)
DP3
(SW7)
DP1
(SW5)
DIP
Switches
12
1
TB1
R3
Zero
Adjust
R7
Gain
Adjust
SG10
TB2
SW1
D1
R10
R6
R9
R8
R1
SG9
R5 R4 R2
5
6
7
8
1
2
3
4
ON
R12
+
2
1
+
2
1
U2
DS-0337D 07/01
A panel-mount retaining clip is supplied with all models
3 D I G I T , 4 - 2 0 m A I N P U T , L E D D I S P L A Y M E T E R S
DMS-30PC-4/20S
DATEL, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151
Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356
Internet: www.datel.com Email: sales@datel.com
DATEL (UK) LTD. Tadley, England Tel: (01256)-880444
DATEL S.A.R.L. Montigny Le Bretonneux, France Tel: 01-34-60-01-01
DATEL GmbH Mnchen, Germany Tel: 89-544334-0
DATEL KK Tokyo, Japan Tel: 3-3779-1031, Osaka Tel: 6-354-2025
DATEL 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. The DATEL logo is a registered DATEL, Inc. trademark.
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