DMS30DR DELTA | Alldatasheet
Document overview
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Technical content
Figure 1. DMS-30DR Simplified Schematic
FEATURES
■ 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 +1.225V REFERENCE OUT (+) INPUT HI (–) INPUT LO ANALOG COMMON REFERENCE OUT REFERENCE IN +5V SUPPLY DP 1 DP 2 DP 3 4 9 2EXTERNAL BRIGHTNESS ADJUSTMENT 5V RETURN +5V –5V +5V 1.225V REF. DATA 909k 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.
0 Vdc
0.01µF 1.82k (1) (1) LIGHT SENSOR DC/DC CONVERTER CONVERTER A/D –5V +5V –5V +5V C&D Technologies’ new DMS-30DR Series are the first digital panel meters to offer LED 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! Until now, users whose instrumentation required daylight visibility had to settle for less 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. All models operate from a single +5V supply, and draw as little as 7mA when operated in total 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. 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’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.
S U N L I G H T R E A D A B L E , A U T O - D I M M I N G L E D D I S P L A Y M E T E R SDMS-30DR Series S U N L I G H T R E A D A B L E , A U T O - D I M M I N G L E D D I S P L A Y M E T E R S Performance/Functional Specifications T ypical at TA = +25°C and supply voltage = +5V using the single-ended input circuit, unless otherwise noted. 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 T echnical Notes. 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 T echnical 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 T ype 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)
Ordering Information
LED Color: R = Red Accessories: DMS-EB-C Multi-purpose (gain/offset, 4-20mA, etc.) DMS-EB-RMS-C For true rms measurements of ac voltages DMS-PS1-CM-C +5V/1.0A AC/DC power supply module DMS-30-CP Panel cutout punch Input Range: = ±200mV 1 = ±2V 2 = ±20V 3 = ±200V A panel-mount DMS-BZL2-C is supplied with each unit. PATENT PENDING RoHS Compliant MPM_DMS-30DR_A01 Page 2 of 6 D I G I T A L P A N E L M E T E R S www.cd4power.com 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. T o 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
- Single-Ended Input Configurations: T rue single-ended measure-
2 avoids problems normally associated with ground-loop currents. loop currents can cause unstable readings. Figure 2. Single-Ended Input Configuration age cases, pin 12 should always be tied to pin 3 (5V RETURN). resistor is connected between the reference IC and pin 9.
- ANALOG COMMON (Pin 10): This pin is connected to an internal,
- REFERENCE OUTPUT (Pin 8) and INPUT (Pin 7): Pin 8 is a preci-
- Decimal Point Placement: The location of the decimal point is user
- Gain-Adjust Potentiometer: The gain-adjust potentiometer located
- Soldering Methods: All models in the DMS-30DR Series easily
tions, performed either manually or by wave soldering machines.
- Suggested Mating Connectors:
S U N L I G H T R E A D A B L E , A U T O - D I M M I N G L E D D I S P L A Y M E T E R SDMS-30DR Series MECHANICAL DIMENSIONS: Inches (mm) TOLERANCES: 2 PL DEC ±0.02 (±0.51) 3 PL DEC ±0.010 (±0.254) LEAD DIMENSIONS: 0.025 (0.635) x 0.025 (0.635) NOMINAL RECOMMENDED PC BOARD FINISHED HOLE DIAMETER: DS-0268A 04/2007 © 2006 C&D Technologies, Inc. C&D Technologies, 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. Specifications are subject to change without notice. The DATEL logo is a registered C&D Technologies, Inc. trademark. C&D Technologies, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356 www.cd4power.com email: sales@cdtechno.com ISO 9001 REGISTERED USA: Tucson (Az), Tel: (800) 547 2537, email: sales@cdtechno.com Canada: Toronto, Tel: (866) 740 1232, email: toronto@cdtechno.com United Kingdom: Milton Keynes, Tel: +44 (0)1908 615232, email: mk@cdtechno.com France: Montigny Le Bretonneux, Tel: +33 (0)1 34 60 01 01, email: france@cdtechno.com Germany: München, Tel: +49 (0)89-544334-0, email: ped.munich@cdtechno.com Japan: Tokyo, Tel: 3-3779-1031, email: sales_tokyo@cdtechno.com Osaka, Tel: 6-6354-2025, email: sales_osaka@cdtechno.com Website: www.cd4power.jp China: Shanghai, Tel: +86 215 027 3678, email: shanghai@cdtechno.com Guangzhou, Tel: +86 208 221 8066, email: guangzhou@cdtechno.com MPM_DMS-30DR_A01 Page 6 of 6 D I G I T A L P A N E L M E T E R S MECHANICAL SPECIFICATIONS BEZEL INSTALLATION AND RECOMMENDED DRILL AND PANEL CUTOUT www.cd4power.com