DMS-30PC-4/20S-24BS-I-C - MURATA MANUFACTURING

–V is not connected to meter ground

on ‘-I’ sufﬁ x models.

➀

DATA

3½ DIGIT A/D

CONVERTER

BAND-GAP

REFERENCE

CIRCUIT

(SW1)

DIP

SWITCHES

DP3

DP2DP1

ZERO

ADJUST

GAIN

ADJUST

N.C.

56781234

+5V

DMS-30PC-1

TB2

4-20mA

LOOP INPUT

–+

TB1

–V

POWER SUPPLY

INPUT

–+

SG9

+5V

VOLTAGE

CONVERTER

+5V

www.murata-ps.com

www.murata-ps.com/support

For full details go to

www.murata-ps.com/rohs

DMS-30PC-4/20S

4-20mA Input 3½ Digit Panel Meters

with Full-Size LED Displays

MPM_DMS-30PC-420S.C01 Page 1 of 4

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 Murata Power Solutions'

super-reliable, ﬁ eld-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.

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

Performance/Functional Speciﬁ cations

Typical at TA = +25°C, unless otherwise noted.

DIP-Switch Settings Table ➁

➀ Input Grounding: Except for the "-I"sufﬁ x 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 conﬁ guration 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 ﬁ rst 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' sufﬁ x 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.

DMS-30PC-4/20S-5RS-C +5V supply, standard-intensity red LED's

DMS-30PC-4/20S-5GS-C +5V supply, standard-intensity green LED's

DMS-30PC-4/20S-5RL-C +5V supply, low-power red LED's

DMS-30PC-4/20S-5RH-C +5V supply, high-intensity red LED's

DMS-30PC-4/20S-24RL-C +7.5V to +32V supply, low-power red LED's

DMS-30PC-4/20S-24RS-I-C +24V isolated supply, standard-intensity

red LED’s

DMS-30PC-4/20S-24RH-I-C +24V isolated supply, high-intensity red LED’s

DMS-30PC-4/20S-24BS-I-C +24V isolated supply, high-intensity blue LED’s

DMS-30PC-4/20S-24GS-I-C +24V isolated supply, standard-intensity

green LED’s

DMS-BZL1-C Panel-mount bezel assembly

DMS-BZL2-C Panel-mount bezel with sealing gasket

DMS-30-CP Panel cutout punch

A panel-mount retaining clip is supplied with each model.

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.

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 speciﬁ cation of ±2 counts (max.). Thus, it may not

always be possible to obtain the exact desired display reading.

Current Loop Input Min. Typ. Max. Units

Full Scale Input Range +3.5 – +22 mA

Input Impedence – 100 – Ohms

Voltage Drop – – 2.0 Volts

Overcurrent Protection – ±0.15 ±0.3 mA

Performance

Sampling Rate 2.5 reading per second

Accuracy (1 minute warm-up) ±0.05%FS ±1 Count

Temperature Drift – ±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 3½ digit, 0.56"/14.2mm high LED

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 ounces (28 grams)

Ordering Information

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 ±1999 Off Off Off On

ACCESSORIES

See www.murata-ps.com/dpm-availability for model-speciﬁ c availability.

www.murata-ps.com/support

DMS-30PC-4/20S

4-20mA Input 3½ Digit Panel Meters

with Full-Size LED Displays

MPM_DMS-30PC-420S.C01 Page 2 of 4

OPERATING AND SETUP INSTRUCTIONS

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

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 read-

ings, 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.

+DMS-30PC-4/20S-24RL

+V+

24V GROUND

SINGLE-ENDED

TRANSMITTER

–

+24V

4-20mA

(TB1-2)

(TB1-1)

(TB2-1)

–V

–

(TB2-2)

Figure 3. Typical Connections for Loop-Powered Transmitters

Driving Single-Ended Meters.

DMS-30PC-4/20S-24RL

V+

24V GROUND

TRANSMITTER

LOOP-POWERED

24V+

4-20mA

N.C.

(TB1-1)

(TB2-1)

–V (TB2-2)

–

(TB1-2)

Figure 6. Typical Connections for Loop-Powered Transmitters

Driving Isolated-Supply Meters (-I part number sufﬁ x).

DMS-30PC-4/20S-24XX-I

DMS-30PC-4/20S-24RL-I

+V (TB2-1)

TRANSMITTER

SINGLE-ENDED

+24V

4-20mA

(TB1-1)

24V GROUND

PLC or OTHER

SINGLE-ENDED

DEVICE

–

+(TB1-2) –

–V

(TB2-2)

4-20mA

Figure 4. Typical Connections for Isolated-Supply Meters

in Series with an Auxiliary Device

Figure 5. Typical Connections for +5V Powered Meters. Note that 5V Ground

and 24V Ground are Tied Together Inside the Meter.

DMS-30PC-4/20S-24RL

++V

5V GROUND

LOOP

TRANSMITTER

+24V

4-20mA

(TB1-1)

(TB2-1)

–V

–

(TB2-2)

(TB1-2)

24V GROUND

+5V

–

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".

www.murata-ps.com/support

DMS-30PC-4/20S

4-20mA Input 3½ Digit Panel Meters

with Full-Size LED Displays

MPM_DMS-30PC-420S.C01 Page 3 of 4

CONNECTION DIAGRAMS

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

Input

+–

Loop

Back View Front View

Input

+–

Power

#2-56 INSERT

FRONT VIEW 0.156 (3.96) DEEP

1.270

(32.26)

0.187

(4.75)

OPTIONAL BEZEL (DMS-BZL1 and DMS-BZL2)

2.35 (59.69)

2.118 (53.80)

RECOMMENDED DRILL AND PANEL CUTOUT DIMENSIONS

0.093 (2.362) DIAMETER (4 REQUIRED)

ONLY WHEN USING OPTIONAL BEZEL ASSEMBLY

INTERNAL CORNER RADII:

1.07

0.032 (0.81) MAX.

(27.18)

0.878

(22.30)

0.096

(2.44)

0.116

(2.95)

2.55 (64.77)

PANEL CUTOUT

MADE IN USA

PANEL

BEZEL

OPTIONAL

GASKET

MADE IN USA

RETAINING CLIP INSTALLATION

PANEL

MADE IN USA

0.92

DMS-30PC-4/20S

(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)

DP2

(SW6)

DP3

(SW7)

DP1

(SW5)

1Depth dimension for the DMS-30PC-4/20S-24RL model only.

DIP

Switches

12 1

TB1

Zero

Adjust

Gain

Adjust

SG10

TB2

SW1

R10

R6 R9

R1 R8

SG9

R5 R4 R2

5678

1243

R12

+–

A panel-mount retaining clip is supplied with all models

www.murata-ps.com/support

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

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-30PC-4/20S

4-20mA Input 3½ Digit Panel Meters

with Full-Size LED Displays

MPM_DMS-30PC-420S.C01 Page 4 of 4