DMS-30DR-0 DELTA [Delta Electronics, Inc.], DMS-30DR-0 Datasheet

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DMS-30DR-0

Manufacturer Part Number
DMS-30DR-0
Description
Manufacturer
DELTA [Delta Electronics, Inc.]
Datasheet
FEATURES
www.cd4power.com
Super-bright LED displays are readable in
direct sunlight!
Autodim circuitry automatically adjusts
display brightness
Includes external brightness adjustment
Large (0.56”/14.2mm) easy-to-read red
LED display
High reliability alternative to LCD displays
Ideal for automotive, industrial, and marine
applications
Encapsulated package mounts in panels or
pc-boards
Miniature housing: 2.17” x 0.92” x 0.56”
(55mm x 23mm x 14mm)
4 differential input ranges provide ±1 count
accuracy
Single +5V supply; Less than 1-Watt power
consumption
0 to +60°C operating temperature range
EXTERNAL BRIGHTNESS
ADJUSTMENT
+5V SUPPLY
5V RETURN
DP 3
DP 2
DP 1
1
2
3
4
5
6
SENSOR
LIGHT
CONVERTER
DC/DC
0 Vdc
+5V
–5V
+5V
Figure 1. DMS-30DR Simplified Schematic
displays that are readable in direct sunlight—no special filters or shading devices are required.
Their Autodim circuit automatically adjusts the display’s brightness to suit viewing environments
ranging from total darkness to full, brilliant sunlight. A user-accessible brightness adjustment pin
enables custom intensity settings or display matching in multiple display applications. Washed
out, hard-to-read digital readouts are a thing of the past!
reliable LCD display technology. However, in order to remain legible in low ambient light, LCDs
require complex, power-hungry backlighting circuitry. And, these displays typically suffer from
very narrow viewing angles. In contrast, DMS-30DR Series LED-based displays’ power consump-
tion drops as ambient light decreases, and their viewing angle extends to nearly 180 degrees
vertically and horizontally.
darkness—that’s less than 1/10 Watt. At maximum brightness power consumption is typically
less than 200mA (1 Watt). DMS-30DR voltmeters are available in four differential input voltage
ranges: ±200mV, ±2V, ±20V and ±200V. Input impedance is 1,000 megohms for the ±200mV
and ±2V inputs and 1 megohm for the ±20V and ±200V inputs. CMRR for all devices is 86dB,
and inputs are overvoltage protected to ±250V. Each meter incorporates a precision, ultra-stable
voltage reference and is factory calibrated prior to encapsulation.
display, Autodim display drivers, light sensor, reference circuit, and A/D converter into in a rugged
epoxy-encapsulated assembly. The device’s 12-pin, component-like, DIP package is both vibra-
tion and moisture proof, making them ideal for harsh environments. Each package incorporates a
built-in color filter and bezel, and is easily mounted in either panels or pc boards.
DATA
C&D Technologies’ new DMS-30DR Series are the first digital panel meters to offer LED
Until now, users whose instrumentation required daylight visibility had to settle for less
All models operate from a single +5V supply, and draw as little as 7mA when operated in total
The small size (2.17” x 0.92” x 0.56”) of DMS-30DR meters is achieved by integrating their
–5V
CONVERTER
A/D
+5V
–5V
Daylight Readable, 3½ Digit Panel Meters
(1)
1.225V
R2 is not used on ±200mV (-0) models or ±2V (-1) models.
R2 = 100k on ±20V (-2) models and 9.1k on ±200V (-3) models.
+5V
REF.
with Auto-Dimming LED Displays
0.01µF
D I G I T A L P A N E L M E T E R S
DMS-30DR Series
R2
PATENT PENDING
(1)
909k
1.82k
R1
12
11
10
MPM_DMS-30DR_A01
9
8
7
(–) INPUT LO
(+) INPUT HI
ANALOG
COMMON
+1.225V REFERENCE OUT
REFERENCE OUT
REFERENCE IN
Page 1 of 6

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DMS-30DR-0 Summary of contents

Page 1

... Each meter incorporates a precision, ultra-stable voltage reference and is factory calibrated prior to encapsulation. The small size (2.17” x 0.92” x 0.56”) of DMS-30DR meters is achieved by integrating their display, Autodim display drivers, light sensor, reference circuit, and A/D converter into in a rugged epoxy-encapsulated assembly. The device’ ...

Page 2

... Min. Full Scale Input Range: DMS-30DR-0 – DMS-30DR-1 – DMS-30DR-2 – DMS-30DR-3 – Input Impedence: – DMS-30DR-0, -1 100 DMS-30DR-2, -3 0.9 – Overvoltage Protection ➀ Common Mode Voltage Range – CMRR (dc to 60Hz) – Control Inputs ➁ Decimal Point Placement (Pins 4-6) Tie to pin 3 to activate Ext ...

Page 3

... RETURN). 1. Single-Ended Input Configurations: True single-ended measure- ments can be made with any DMS-30DR meter. The circuit of Figure 2 avoids problems normally associated with ground-loop currents. Separate ground runs should be used for 5V RETURN (pin 3) and (–) INPUT LO (pin 12) ...

Page 4

... DMS-30DR Series APPLICATIONS 2. Differential Input Configurations: Differential measurements can be made with all DMS-30DR meters. Figure 3, though not a practical real- world application, uses a voltage divider to demonstrate the concept of a differential input signal. Be careful not to exceed the ±2V common mode voltage limitation for 5V-powered meters. ...

Page 5

... DMS-30DR Series APPLICATIONS 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 1.000 Volts Fsr R = 1.000V/(0.020 – 0.004)A Shunt R = 1.000V/0.016A = 62.5 Ohms Shunt To calibrate the circuit of Figure 7, perform the following: 1. With 4mA applied, adjust the 50kΩ ...

Page 6

... DMS-30DR Series MECHANICAL SPECIFICATIONS ����������� ��� ������������� ������������� ���� ��������� ...

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