DMS-30PC-1-RL-C Murata Power Solutions Inc, DMS-30PC-1-RL-C Datasheet - Page 5

• Manufacturer Part Number: DMS-30PC-1-RL-C
• Description: DPM LED MINI 2VDC 3.5DIG LP RED
• Manufacturer: Murata Power Solutions Inc
• Type: Voltmeterr
• Series: DMS-30PCr

Specifications of DMS-30PC-1-RL-C

• Display Type: LED
• Measuring Range: ±2V
• Display Style: Red Characters, Black Background
• Display Face Size: 2.09" L x 0.84" W (53.1 x 21.3mm)
• Display Digits: 3.5
• Display Digits - Height: 0.560" (14.22mm)
• Backlight: Without
• Mounting Type: Panel Mount
• Termination: PC Pins
• Voltage - Supply: 4.75 ~ 5.25V
• Equipment Type: 3 1/2 Digit, LED Display Low-Power
• Input: +/- 2 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 811-1023

APPLICATIONS
6. Power Supply Monitoring: One of the most common digital panel
4-20mA
85-264Vac
+
–
Example: For a meter with a 2V full scale input (1.999 full
scale reading) and a desired display reading of
"1000" (with an input of 20mA), V
To calibrate the circuit of Figure 7, perform the following:
1. With 4mA applied, adjust the 50kΩ potentiometer (R2) to
2. With 20mA applied, adjust the gain-adjust potentiometer on
meter applications involves monitoring the output voltage of the
system power supply — often this supply also powers the meter
itself. The low-power, red LED DMS-30PC-2-RL can be confi gured
to allow power supply monitoring over the range of 4.5-18Vdc. The
circuit in Figure 8 uses a low-drop-out, three-terminal regulator (LM-
2931Z-5, available from National Semiconductor) to provide regulated
5V power to the meter. The LM-2931 was chosen because it has the
following on-chip protection features: reverse polarity, short circuit
+
–
4.5 - 18Vdc
display a reading of "000" (assuming that is the desired
reading).
the back of the meter to display a reading of "1000". For
different full scale readings, alter the value of R
AC to DC Converter
R1
LM2931Z-5
R
R
IN
Shunt
Shunt
ANA COMM
GND
50k
(–) IN LO
OUT
(+) IN HI
Figure 7. 4-to-20mA Current Loop Operation
R2
= 1.000V/(0.020 – 0.004)A
= 1.000V/0.016A = 62.5 Ohms
Figure 8. 4.5-18V Power Supply Monitor
22μF
10V
11
10
12
+
1.23V
REF
+5V SUP
9
5V RET
DP2
Fsr
1
3
5
(+) IN HI
DMS-30PC-1
= 1.000 Volts
11
5V SUP
1
REF
www.murata-ps.com/dpm
IN
7
DMS-30PC-2-RL
Shunt
5V RET
3
8
OUT
REF
accordingly.
12
(–) IN LO
7
REF IN
8
REF OUT
7. Digital Ammeter: Digital ammeters are fi nding ever-increasing
8. External Gain Adjustment: Connect REFERENCE OUT
CALIBRATOR
and thermal run-away. When using other, higher-power, DMS-30PC
models with three-terminal regulators, be sure to consult the regula-
tor manufacturer's data sheet to ensure the regulator is being utilized
safely and correctly.
usage because analog-style ammeters (moving-vane types) now cost
roughly the same as their digital counterparts. Additionally, analog
ammeters are not nearly as rugged as modern digital panel voltme-
ters. Figure 9 illustrates a typical ammeter application. The circuit
uses a ±200mV input meter
— the preferred range for most ammeters — to measure the voltage
developed across a 0.1Ω current shunt. The circuit shown represents
a basic ammeter connection diagram. A detailed application note
describing digital dc ammeters is included in DATEL's new Digital
Panel Meter Databook.
(pin 8) to REFERENCE IN (pin 7) for normal, factory calibrated,
operation. Use the +1.23V REFERENCE OUT (pin 9) for applica-
tions needing external gain adjustment. Figure 10 shows the wiring
confi guration for each model. Calibration is performed with a precise,
near-full-scale, input voltage.
VOLTAGE
+
–
OUT
COM
5Vdc
Technical enquiries email: [e-mail], tel:
Figure 10. External Gain Adjustment
Figure 9. Basic DC Ammeter Circuit
+5V SUP
1.5 Amp (Load Current)
5V RET
(–) IN LO
(+) IN HI
5V RET
3½ Digit, LED Display Low-Power,
Miniature Digital Panel Voltmeters
ANA COMM
DP1
11
12
1
3
6
3
DMS-30PC Series
10
(–) IN LO
10 to 20 Turns
8.45k, 1%
NC
8
12
1k
DMS-30PC-0
DMS-30PC
R
0.150V
MPM_DMS_30PC.F05 Page 5 of 6
0.1
Shunt
10 to 20 Turns
W
8.45k, 1%
1k
REF IN
7
11
(+) IN HI
(3.3 )
Load
W
1.23V REF
and ±200V models
9
Connections
for ±200mV
for ±2V, ±20V
[phone]
Connections
models
8
REF OUT
7
REF IN