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DMS-20PC-0/5 Series
0-5V and 0-10V Input 3½ Digit, LED
Display Process Control Monitors
MPM_DMS20pc_5V.C01 Page 1 of 4
Murata Power Solutions’ DMS-20PC-0/5 Series are the world's smallest, full-featured,
0-5V input process control monitors. Their large, easy-to-read, 0.37"/9.4mm LED displays
are available in a choice of 4 LED color/intensity options: standard red, standard green,
super-bright red, and low-power red. Two power supply input ranges are also available:
the industry-standard +5V and a wide-range +5V to +40V (which typically draws 9mA at
+24V).
Gain (span) and offset (zero) adjustments are performed with on-board, precision,
20-turn potentiometers. All decimal-point and range-change selections are made on an
8-position, vibration-resistant, gold-plated DIP switch. Unlike competitive meters, there
are no jumpers or solder gaps to open or close, and to further enhance reliability, the
entire assembly utilizes 100% soldered connections. Both power-supply and input-signal
connections are made via reliable screw-type terminal blocks.
The DMS-20PC-0/5's DIP switch and potentiometers accommodate hundreds of input-
voltage/output-reading combinations. This practically eliminates the need for more costly,
long-lead-time, factory "specials" in applications which use several different-range meters.
A supplied bezel assembly––featuring metal fasteners and a rubber gasket––simplifi es
panel mounting and also provides excellent resistance to environmental dust and moisture.
All these outstanding features combine to make the DMS-20PC-0/5 the perfect meter for
prototype and OEM, 0-5V input, process control monitoring.
FEATURES
Accepts 0-5V and 0-10V inputs
Large, easy-to-read, 0.37"/9.4mm LED display
Choice of 5 LED power/color options
High input impedance, 100kΩ
+5V to +40V model draws 9mA typ.
Miniature size: 1.38" x 1.25" x 0.95"
High-quality, 20-turn, span (gain) and zero (offset)
adjustments
DIP-switch selectable range and decimal points
Vibration-resistant package; Reliable screw-terminal
input connections
Hundreds of different input/readout combinations
DP3DP2DP1
+V
TB2
–
+
Signal Input
TB1
–V
–
+
Zero
Adjust
R3 R7
Gain
Adjust
Band-Gap
Reference
Circuit
HI LO
+5V –5V
3½ Digit
–5V +5V
A/D Converter
+5V
DC/DC
DIP Switches
Converter
Power Supply Input
DATA
–5V
N.C.
N.C.
ON
12346587
21 21
SIMPLIFIED SCHEMATIC DIAGRAM
Figure 1. DMS-20PC-0/5 simplifi ed schematic
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DMS-20PC-0/5 Series
0-5V and 0-10V Input 3½ Digit, LED
Display Process Control Monitors
MPM_DMS20pc_5V.C01 Page 2 of 4
OPERATING AND SETUP INSTRUCTIONS
TECHNICAL NOTES
DMS-20PC-0/5-5RS-C +5V supply, standard-intensity red LED's
DMS-20PC-0/5-5GS-C +5V supply, standard-intensity green LED's
DMS-20PC-0/5-5BS-C +5V supply, bright blue LED's
DMS-20PC-0/5-5RL-C +5V supply, low-power red LED's
DMS-20PC-0/5-5RH-C +5V supply, high-intensity red LED's
DMS-20PC-0/5-24RL-C +5V to +40V supply, low-power red LED's
DMS-20-CP Panel cutout punch
As shipped, the DMS-20PC-0/5 is factory calibrated to read "000" for
a 0.0V input and "1999" for a 5.0V input. The following worst-case
procedure assumes the DMS-20PC-0/5 is completely mis-adjusted, i.e.,
both potentiometers and the DIP switches are randomly set.
1. Set R7 (full scale span/gain adjust) and R3 (zero/offset adjust) fully
clockwise, roughly 22 turns, and place SW1-SW8 to OFF (down
position).
2. Select DIP switch setting #1 in Table 1.
3. Apply a precision 0.0V input and adjust R3 until the meter's display
reads "000.”
4. Apply a precision 5.0V input and adjust R7 until the meter's display
reads "1999.” Repeat steps 3 and 4 to make sure the adjustments
do not affect one another.
5. Select the appropriate decimal point by setting SW6, SW7 or SW8 to
ON (DP1, DP2 or DP3 respectively).
NOTE: The "000" to "1999" display readings referred to in the
instructions above are for illustrative purposes only. If other display
readings such as "000" to "1200" are desired, refer to the DIP-
Switch Settings Tables for SW1-SW4 settings. (SW5 is reserved for
future use, it has no affect on display operation.) The initial setting
of R3 and R7 fully clockwise is recommended in the adjustment
procedure for all the following examples.
➀ The DMS-20PC-0/5 can also be used in most 0-10V applications. See the section
on 0-10V inputs for more information. See Note 3 on Table 1.
➁ INPUT LO (TB1 "–LO") is internally connected to the power return (TB2 "–V").
Overvoltage specifi cations apply to the INPUT HI (TB1 "+HI") connection.
1. Input Confi guration: The DMS-20PC-0/5 has its input low terminal
(TB1 "LO") internally connected to the power supply ground terminal
(TB2 "–V"). This connection effectively places the meter's input in a
single-ended confi guration. In some applications, single-ended inputs
can cause ground-loop induced errors (the meter's display becomes
unstable or bounces). This occurs because the LED drive currents
fl ow through both the –V terminal and the signal LO terminal.
If suspected ground-loop errors are encountered, and the input signal
LO terminal is externally connected to –V somewhere else in the
system, try removing the connection to TB1 "LO.” Inputs which have
no ground-return connection to –V (commonly referred to as "fl oating
inputs") must have their most negative potential tied to TB1 "LO."
Please consult Murata Power Solutions for more information.
Applications which require electrical isolation between the input
signal source and the system power supply must use a separate
transformer-isolated supply to power the meter.
2. Panel Mounting: In most standard through-the-panel installations,
the DMS-20PC-0/5 must be secured to the panel with DMS-BZL4
bezel assemblies (see the Mechanical Specifi cations section for more
information).
Performance/Functional Specifi cations
Typical at TA = +25°C, unless otherwise noted.
Inputs Min. Typ. Max. Units
Full Scale Input Range ➀ 4.9 5.0 5.1 Volts
Input Impedence 100 – 140 kΩ
Overvoltage Protection ➁ – – ±40 Volts
Performance
Sampling Rate 2.5 reading per second
Accuracy (1 minute warm-up): ±0.05%FS ±1 Count
Temperature Drift (0 to +60°C) – ±0.15 ±0.3 Cnts/°C
Power Supply Requirements
DMS-20PC-0/5-5RS (90mA max.) +4.75 +5.00 +5.25 Volts
DMS-20PC-0/5-5GS, -5BS (120mA max.) +4.75 +5.00 +5.25 Volts
DMS-20PC-0/5-5RL 15mA max.) +4.75 +5.00 +5.25 Volts
DMS-20PC-0/5-5RH (90mA max.) +4.75 +5.00 +5.25 Volts
DMS-20PC-0/5-24RL (15mA max.) +4.75 – +40.0 Volts
Display
Display Type and Size 3½ digit, 0.37"/9.4mm high LED
Polarity Indication "–" for negative VIN
Overrange Indication "–1_ _ _" for negative inputs
"1_ _ _" for positive inputs
Physical/Environmental
Operating Temperature 0 – +60 °C
Storage Temperature –20 – +75 °C
Humidity (non-condensing) 0 – 95 %
Case Material Polycarbonate
Weight 0.6 ounces (17 grams)
Ordering Information
Note: A DMS-BZL4 bezel assembly with a sealing gasket is supplied with each meter.
See www.murata-ps.com/dpm-availability for model-specifi c availability.
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DMS-20PC-0/5 Series
0-5V and 0-10V Input 3½ Digit, LED
Display Process Control Monitors
MPM_DMS20pc_5V.C01 Page 3 of 4
Display Reading SW1 SW2 SW3 SW4
0.0V Input 5.0V Input
1. 000 1200-1999 Off Off Off Off
2. 000 700-1200 On Off Off Off
3. 000 400-700 Off On Off Off
4. 000 300-400 Off Off On Off
5. 000 190-300 Off On On Off
6. 000 120-190 Off Off On On
7. 000 100-150 Off On On On
8. 000 90-140 On On On On
Table 1. 0-5V DIP-Switch Settings ➂
➂ The DMS-20PC-0/5 is optimized for handling 5V signal ranges that are
positioned between –0.1V and +6.0V. As such, input ranges can be anywhere
between –0.1V to +4.9V and +1.0V to +6.0V as long as their full range is
5 Volts. The meter's zero/offset potentiometer (R3) has enough adjustment
range to produce a "000" display reading for input signal levels between
–0.1V and +1.0V.
Please note the DMS-20PC digital panel meter from which the DMS-20PC-0/5
is derived has an accuracy specifi cation of ±2 counts (max.). Thus, it may not
always be possible to obtain the exact desired display readings.
1. Desired display readings are:
0.0V input = "0.00"
5.0V input = "6.00"
Use DIP-switch setting #3 in Table 1 and enable decimal point DP2
via SW7. Apply 0.0V and adjust R3 so the display reads "0.00.”
Apply 5.0V and adjust R7 so the display reads "6.00.”
2. Desired display readings are:
0.0V input = "000"
5.0V input = "800"
Use DIP-switch setting #2 in Table 1. Apply 0.0V and adjust R3 so
the display reads "000.” Apply 5.0V and adjust R7 so the display
reads "800.” For these display readings, no decimal points are
used. Set SW6, SW7 and SW8 to OFF.
3. Desired display readings are:
0.0V input = .”000"
5.0V input = .”250"
Use DIP-switch setting #5 in Table 1 and enable decimal point DP1
via SW6. Apply 0.0V and adjust R3 so the display reads "000.” Apply
5.0V and adjust R7 so the display reads .”250.”
Examples (0-5V Inputs)
While the DMS-20PC-0/5 is optimized for operation with 0-5V inputs,
its versatile input stage can also accommodate most 0-10V applica-
tions. The meter's zero/offset potentiometer (R3) has enough adjust-
ment range to produce a "000" display reading with input signal levels
between –0.1V and +1.0V. Table 2. summarizes the available ranges
when the DMS-20PC-0/5 is used with 0-10V inputs.
0-10V Inputs
1. Desired display readings are:
0.0V input = "000"
10.0V input = "500"
Use DIP switch setting #4 in Table 2. Apply 0.0V and adjust R3 so
the display reads "000.” Apply 10.0V and adjust R7 so the display
reads "500.”
Display Reading SW1 SW2 SW3 SW4
0.0V Input 10.0V Input
1. 000 1400-1999 On Off Off Off
2. 000 800-1400 Off On Off Off
3. 000 600-800 Off Off On Off
4. 000 380-600 Off On On Off
5. 000 240-380 Off Off On On
6. 000 200-300 Off On On On
7. 000 180-280 On On On On
Table 2. 0-10V DIP-Switch Settings
Example (0-10V Inputs)
4. Desired display readings are:
1.0V input = "000"
6.0V input = "090"
Even though this input is positioned between +1.0V and +6.0V,
it still meets the 5V full scale input range listed in the Functional
Specifi cations section. Use DIP-switch setting #8 in Table 1. Apply
1.0V and adjust R3 so the display reads "000.” Apply 6.0V and adjust
R7 so the display reads "090.” With this type of input, it is advisable
to recheck both input levels to be sure the potentiometer settings do
not affect one another.
123
ON
45768
123
ON
46578
1
ON
2345678
132 4
ON
6578
132
ON
45678
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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. Specifi cations are subject to change without
notice. © 2015 Murata Power Solutions, Inc.
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfi eld, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
This product is subject to the following operating requirements
and the Life and Safety Critical Application Sales Policy:
Refer to: http://www.murata-ps.com/requirements/
DMS-20PC-0/5 Series
0-5V and 0-10V Input 3½ Digit, LED
Display Process Control Monitors
MPM_DMS20pc_5V.C01 Page 4 of 4
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)
DP2
(SW7)
DP3
(SW8)
DP1
(SW6)
Front View
0.80
(20.3)
0.040
(1.02)
1.30
(33.0)
1.38
(35.1)
0.88
(22.4)
0.95
(24.1)
MADE IN USA
DMS-20PC-0/5
1.25
(31.8)
0.040
(1.02)
0.040
(1.02)
0.44
(11.2)
TYP.
R3
12 1
R7
ON
12345678
+– +–
+–
+–
Back View
DIP
Switches
Zero/Offset
Adjust
Gain/Span
Adjust TB1
Signal
Input
TB2
Power
Input
#2-56 INSERT
0.156 (3.96) DEEP
FRONT VIEW 1.280
(32.51)
0.187
(4.75)
1.826 (46.38)
0.838
(21.29)
1.626 (41.30)
1.07
(27.18)
INTERNAL CORNER RADII:
0.032 (0.81) MAX.
0.093 (2.362) DIA
(4 REQUIRED)
0.116 (2.95)
1.336 (33.93) 0.145 (3.68)
PANEL CUTOUT
BEZEL INSTALLATION
BEZEL
PANEL
GASKET
MECHANICAL SPECIFICATIONS
BEZEL INSTALLATION AND RECOMMENDED DRILL AND PANEL CUTOUT
