DMS-30DR-3 Ver la hoja de datos (PDF) - Delta Electronics, Inc.
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Fabricante
DMS-30DR-3
Delta Electronics, Inc.
DMS-30DR-3 Datasheet PDF : 6 Pages
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DMS-30DR Series
SUNLIGHT READABLE, AUTO-DIMMING LED DISPL AY METERS
Performance/Functional Specifications
Typical at TA = +25°C and supply voltage = +5V using the single-ended input circuit,
unless otherwise noted.
Analog Inputs
Min. Typ. Max. Units
Full Scale Input Range:
DMS-30DR-0
–
±200
–
mV
DMS-30DR-1
–
±2
–
Volts
DMS-30DR-2
–
±20
–
Volts
DMS-30DR-3
–
±200
–
Volts
Input Impedence:
–
DMS-30DR-0, -1
100 1000
–
MΩ
DMS-30DR-2, -3
0.9
1
–
MΩ
Overvoltage Protection ➀
–
–
±250 Volts
Common Mode Voltage Range
–
–
±2
Volts
CMRR (dc to 60Hz)
–
86
–
dB
Control Inputs ➁
Decimal Point Placement (Pins 4-6) Tie to pin 3 to activate
Ext. Bright (Pin 2)
See Technical Note 1
Performance
Sampling Rate
2.5 reading per second
Accuracy (3 minute warm-up):
DMS-30PC-0 (Vin = +0.19V)
–
±1
±3 Counts
DMS-30PC-1 (Vin = +1.9V)
–
±1
±3 Counts
DMS-30PC-2 (Vin = +19V)
–
±2
±3 Counts
DMS-30PC-3 (Vin = +190V)
–
±2
±3 Counts
Zero Reading (Vin = 0 Volts)
“–001” “000” “001”
Temperature Drift (0 = +60°C)
–
±0.2 ±0.4 Cnts/°C
+1.225V Reference Output (Pin 9)➁ +1.215 +1.225 +1.235 Volts
Power Supply Requirements
Supply Voltage
+4.75 +5.00 +5.25 Volts
Supply Current:
Full Sunlight
– +150 +250 mA
Total Darkness
–
3
5
mA
Display
Display Type and Size
3½ digit, 0.56"/14.2mm high LED
Polarity Indication
Autopolarity ("–" for negative Vin)
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
0.75 ounces (21 grams)
➀ Applies for transient or continuous overvoltages applied to (+) INPUT HI (pin 11) with
(–) INPUT LO (pin 12) properly connected. Pin 12 is not overvoltage protected
(see Figure 1). Voltages applied to pin 12 should not exceed the supply voltage.
➁ See Technical Notes.
www.cd4power.com
Ordering Information
DMS-30DR- 1 - R - C
PATENT PENDING
Input Range:
0 = ±200mV
1 = ±2V
2 = ±20V
3 = ±200V
RoHS Compliant
LED Color:
R = Red
Accessories:
DMS-EB-C
DMS-EB-RMS-C
DMS-PS1-CM-C
DMS-30-CP
Multi-purpose (gain/offset, 4-20mA, etc.)
For true rms measurements of ac voltages
+5V/1.0A AC/DC power supply module
Panel cutout punch
A panel-mount DMS-BZL2-C is supplied with each unit.
TECHNICAL NOTES
1. External Brightness Adjustment (Pin 2): Pin 2 is internally con-
nected to the high impedance input of an operational amplifier that
amplifies the output of the DMS-30DR’s ambient light sensor (ALS)
circuit. The output of this amplifier varies the voltage that drives the
DMS-30DR’s LED display. Leave pin 2 open for standard auto-dim-
ming operation; in this mode, the ALS circuit will automatically adjust
the DMS-30DR’s LED brightness to compensate for changes in ambi-
ent lighting. As the ambient light striking the ALS increases, the LED
display’s brightness will also increase; a decrease in ambient light will
reduce the display’s brightness.
The ALS circuit’s output signal can be overdriven by applying an
externally generated voltage directly to pin 2. External drivers will see
approximately 600Kohms referenced to 5V RETURN. With pin 2 at
+0.7Vdc or below, the DMS-30DR’s LED display is off, and total cur-
rent drain from a nominal +5V supply is approximately 1mA. The LED
display’s brightness will increase from minimum to maximum as the
voltage applied to pin 2 is varied from +0.8V up to +2.5V, respectively.
To enable continuous maximum display brightness, connect pin 2
directly to pin 1 (+5V SUPPLY); in this configuration the total current
drain for the meter will be approximately 200mA.
2. Minimum-Intensity Adjustment Potentiometer: Users can adjust
the DMS-30DR’s minimum LED brightness to suit their requirements
by adjusting the ¾-turn, rear-mounted intensity adjustment poten-
tiometer. Please note, this potentiometer will have minimal impact
on display brightness in high ambient light environments. See the
Mechanical Specifications section for potentiometer locations.
The intensity adjustment potentiometer is factory preset to its
mid-point position, producing a typical current drain of 7mA. At it’s
minimum and maximum positions, current drain is typically 3mA and
13mA, respectively. As viewed from the rear of the meter, with the
model number label facing up, turning the potentiometer clockwise
increases the display’s intensity.
3. +1.225V REFERENCE OUTPUT (Pin 9): This pin is the output of the
meter’s precision +1.225V internal reference IC. Pin 9 is referenced
to ANALOG COMMON (pin 10), which in turn sits approximately +2V
above pin 3. Pin 9 should be buffered if it’s used to drive external
loads since sourcing more than 15µA of current can affect both the
DIGITAL PANEL METERS
MPM_DMS-30DR_A01 Page 2 of 6
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