Datasheet

ManualsBrandsC&D Datel ManualsAutomationDigital display ±20 V

(+) INPUT HI

(–) INPUT LO

ANALOG

COMMON

DP4

REFERENCE IN/OUT

+5V SUPPLY

DP 1

DP 2

DP 3

DC/DC

CONVERTER

5V RETURN

+5V

–5V

+5V

2.5V

REF.

DATA

V+

V–

A/D

CONVERTER

0 Vdc

0.01μF

DISPLAY HOLD

DISPLAY TEST

R2 is not used on ±2V (-1) models.

R2 = 101k on ±20V (-2) models and 9.2k on ±200V (-3) models.

909k

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DMS-40PC Series

4½ Digit, LED Display Digital Panel Voltmeters

09/27/11 MPM_DMS-40PC.C06 Page 1 of 6

DMS-40PC Series, 4½ Digit, LED Display, Miniature DPM’s are fully self-contained,

component-like, plug-in meters that provide scientiﬁc-grade accuracy (typically ±2 counts

or ±0.005% of full scale) and outstanding reliability at a very affordable price.

Within its miniature (2.17” x 0.92” x 0.56”), epoxy-encapsulated package, each meter

contains a precision reference circuit; a high-resolution, autozeroing, factory-calibrated

A/D converter; and a large (0.52”/13.2mm), easy-to-read, LED display. LED’s are available

in red, yellow and green colors. Red LED’s are also offered in high-intensity or low-power

versions.

The versatile design of the DMS-40PC Series assures trouble-free installation and

long-term operation. Differential input voltage ranges include ±2V, ±20V and ±200V. Input

impedance is a minimum 800kΩ. Non-inverting inputs are overvoltage protected to ±250V,

and CMRR is typically 86dB (dc to 60Hz).

The DMS-40PC's epoxy-encapsulated package has an integral bezel and color ﬁlter.

The moisture and vibration-proof package is extremely rugged and well suited for harsh

environments and extended temperatures. Devices are fully speciﬁed for

0 to +50°C operation.

All models operate from a single +5V supply and typically consume 500mW. Low-

power models, whose display is just as bright as standard models, typically consume

175mW. DISPLAY TEST and HOLD functions are standard on each meter, and a complete

set of BCD outputs are optional for sending data to CPU's or remote displays.

FEATURES

■

Precision, autozeroing, factory-calibrated A/D converter

■

Scientiﬁc-grade accuracy, ±2 counts

■

Miniature size: 2.17" x 0.92" x 0.56"

55mm x 23mm x 14mm

■

Large (0.52"/13.2mm) LED display

■

Choice of red, green or yellow colors

■

High-intensity or low-power red LED's optional

■

Single +5V supply (175mW for low-power models)

■

Epoxy-encapsulated, 12-pin DIP with built-in color ﬁlter

and bezel

■

3 differential input voltage ranges

■

DISPLAY HOLD and TEST functions

■

Optional BCD data outputs for CPU interface

■

0 to +50°C temperature range

Summary of content (6 pages)

PAGE 1
DMS-40PC Series www.murata-ps.com 4½ Digit, LED Display Digital Panel Voltmeters FEATURES ■ Precision, autozeroing, factory-calibrated A/D converter ■ Scientiﬁc-grade accuracy, ±2 counts ■ Miniature size: ■ Large (0.52"/13.
PAGE 2
DMS-40PC Series 4½ Digit, LED Display Digital Panel Voltmeters 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 DMS-40PC-1 – ±2 – Volts DMS-40PC-2 – ±20 – Volts – ±200 – Volts DMS-40PC-3 Input Impedence: Humidity (non-condensing) – DMS-40PC-1 100 1000 – MΩ DMS-40PC-2, -3 0.
PAGE 3
DMS-40PC Series 4½ Digit, LED Display Digital Panel Voltmeters 4. DISPLAY HOLD (Pin 9): For normal operation, this pin should be left open. To hold the meter’s last reading and display it continuously, tie pin 9 to ground (pin 3, 5V RETURN). 5. Decimal Point Placement: The location of the decimal point is userselectable, and the decimal point control pins (DP1-DP4) are active low functions. Select the appropriate decimal point by tying pin 4, 5, 6 or 8 to pin 3 (5V RETURN).
PAGE 4
DMS-40PC Series 4½ Digit, LED Display Digital Panel Voltmeters APPLICATIONS The voltages developed across R1, R2 and R3 are equal to each other and measure approximately +1.6666Vdc or 1/3 of the +5V power source. More importantly, while the signal across R3 is single-ended, both ends of R1 and R2 are well above ground and are described here as being differential. Please note that while the DMS-40PC can measure the voltages across either R2 or R3, it cannot measure the +1.
PAGE 5
DMS-40PC Series 4½ Digit, LED Display Digital Panel Voltmeters APPLICATIONS 5. Engineering Scaling and Input Attenuation: In many applications, the input signal must be scaled, or divided down, before being applied to the DMS-40PC. In some situations, the input signal exceeds the full-scale range of the meter, and in other applications, a direct one-to-one relation does not exist between the input voltage and the desired display reading. For an example of the second situation, assume an input voltage of 1.
PAGE 6
DMS-40PC Series 4½ Digit, LED Display Digital Panel Voltmeters MECHANICAL DIMENSIONS: Inches (mm) TOLERANCES: 2 PL DEC ±0.02 (±0.51) 3 PL DEC ±0.010 (±0.254) PIN #1 IDENTIFIER DMS-40PC-X-XX LEAD DIMENSIONS: 0.025 (0.635) x 0.025 (0.635) NOMINAL MADE IN USA ® INSIDE ROW (BCD MODELS ONLY) CALIBRATION POTENTIOMETER HOLE LOCATION PIN 1 0.290 (7.37) (LSD) DIGIT 5 (MSD) DIGIT 1 DIGIT 2 DIGIT 3 DIGIT 4 POLARITY A B C D E F +5V SUPPLY DISPLAY TEST 5V RETURN DP3 DP2 DP1 1 2 3 4 5 6 0.325 (8.