DMS-30LCD Series www.murata-ps.com 3½ Digit, LCD Display Digital Panel Voltmeters FEATURES Offering all the outstanding features and benefi ts of Murata Power Solutions’ industry leading DMS-20LCD Series of 3½ Digit LCD Panel Meters, DMS-30LCD meters offer larger, Large (0.4"/10.2mm), enhanced-contrast, LCD display more easily readable displays at slightly higher power consumptions. Like all DMS Series Single +5V supply or 9V battery LCD meters, these miniature (2.17” x 0.92” x 0.43”), epoxy-encapsulated devices offer Power as low as 3.2mW component-like ease-of-use, outstanding reliability and easy installation in either panels or pc-cards. Miniature size: 2.17" x 0.92" x 0.43" (55mm x 23mm x 11mm) DMS-30LCD devices operate from a single +5V supply or a 9V battery. Battery-oper- ated units typically draw 350μA and consume a mere 3.2mW. Backlit models are available Epoxy-encapsulated, 12-pin DIP for low-light applications; though we have found many designers prefer Murata Power Backlit displays optional Solutions’ unique low-power LED meters in those circumstances. 4 differential input voltage ranges Offering 4 optional input voltage ranges (±200mV, ±2V, ±20V or ±200V), DMS-30LCD High accuracy, ±1 count (±0.05%) meters have an extremely user-friendly input structure. They can be used in differential or single-ended modes. Input impedance is a minimum 800kΩ. CMRR is typically 86dB. Autopolarity changeover and overrange indication CMV is ±2V, and inputs are overvoltage protected to ±100V. User-selectable decimal point placement Each meter incorporates an extremely stable, double regulated reference and is fully Numerous "plug-on" application boards calibrated at our factory prior to encapsulation. We guarantee outstanding initial accuracy 0 to +60°C temperature range (±1 count) and excellent stability over temperature (±0.15 counts/°C). These extremely rugged meters are moisture and vibration proof and never require adjustment or recalibra- tion. For popular applications (4-to-20mA, rms-to-dc conversion, ac line power, J and K thermocouples, etc.), the DMS-30LCD Series includes a complete line of "plug-on" applica- tion boards that conveniently convert your meter into an application-specifi c instrument. +5V +5V SUPPLY/ 1 V+ 12 (–) INPUT LO +BATTERY R2 1 –5V 0.01µF 3 DISPLAY TEST/ 2 DC/DC 2 R1 11 (+) INPUT HI BACKLIGHT CONVERTER V– 909k +2.0V 5V RETURN/ 3 J1 A/D 10ANALOG –BATTERY 0 Vdc CONVERTER COMMON 1.23V DATA REF. 4 9 DP 3 +1.23V REFERENCE OUT 1.82k 5 8 DP 2 REFERENCE OUT +5V 6 7 DP 1 REFERENCE IN 1 R2 is not used on ±200mV (-0) models or ±2V (-1) models. 2 DC/DC converter is not used on 9V-powered models, R2 = 100k on ±20V (-2) models and 9.1k on ± 200V (-3) models. J1 is connected. 3 Display Test function is not available on backlit models. For full details go to www.murata-ps.com/rohs www.murata-ps.com/support MPM_DMS30LCD.E01 Page 1 of 6

DMS-30LCD Series 3½ Digit, LCD Display Digital Panel Voltmeters Performance/Functional Specifi cations Typical at TA = +25°C and supply voltage = +5V (using the single-ended input circuit) or +9V (using the differential input circuit), unless otherwise noted. Analog Inputs Min. Typ. Max. Units Physical/Environmental Full Scale Input Range: Operating Temperature 0 – +60 °C DMS-30LCD-0 – ±200 – mV Storage Temperature –20 – +75 °C DMS-30LCD-1 – ±2 – Volts Humidity (non-condensing) 0 – 95 % DMS-30LCD-2 – ±20 – Volts Case Material Polycarbonate DMS-30LCD-3 – ±200 – Volts Weight 0.75 ounces (21 grams) Input Impedence: 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 DMS-30LCD-0, -1 100 1000 – MΩ protected (see Figure 1). Voltages applied to pin 12 should not exceed the DMS-30LCD-2, -3 0.8 1 – MΩ supply voltage. Overvoltage Protection ➀ – – ➁ Listed spec applies to 5V-powered models only. For 9V-powered models, both (–) INPUT LO (pin 12) and (+) INPUT HIGH (pin 11) must always be at least DMS-30LCD-0, -1, -2 – – ±100 Volts 1.5V above –BATTERY (pin 3) and at least 1.5V below +BATTERY (pin 1). DMS-30LCD -3 – – ±250 Volts ➂ See Technical Notes. Common Mode Voltage Range ➁ – – ±2 Volts CMRR (dc to 60Hz) – 86 – dB Ordering Information Control Inputs ➂ DMS-30LCD -1 - 5 - C Decimal Pt. Placement (Pins 4-6): Functionality Tie to pin 3 to activate Add -C for RoHS Logic Compatibility TTL (on 5V-powered models) Input Range: Leave blank for standard Display Test (Pin 2) Tie to pin 1 to activate 0 = ±200mV models. 1 = ±2V Backlight (Pin 2) Tie to pin 3 to turn on backlight Add B for backlit models. 2 = ±20V Power Source: Performance 3 = ±200V 5 = +5V 9 = +9V Sampling Rate 2.5 reading per second Accuracy (1 minute warm-up): See www.murata-ps.com/dpm-availability for model-specifi c availability. DMS-30LCD-0 (Vin = +0.19V) – ±1 ±2 Counts Accessories: DMS-30LCD-1 (Vin = +1.9V) – ±1 ±2 Counts DMS-30-CP Panel cutout punch DMS-BZL1-C DMS-30 bezel assembly DMS-30LCD-2 (Vin = +19V) – ±2 ±3 Counts DMS-BZL2-C DMS-30 bezel assembly with sealing gasket DMS-30LCD-3 (Vin = +190V) – ±2 ±3 Counts Add-On Application Boards: Zero Reading (Vin = 0 Volts) “–001” “000” “001” DMS-EB-C Multi-purpose (gain/offset, 4-20mA, etc.) DMS-EB-DC/DC-C Provides isolated +5V power Temperature Drift (0 = +60°C) – ±0.2 ±0.4 Cnts/°C DMS-EB-RMS-C For true rms measurements of ac voltages +1.23V Reference Out (Pin 9) +1.20 +1.23 +1.25 Volts DMS-EB-AC/DC-C For ac line-powered applications Power Supply Requirements (5V Models) A panel-mount retaining clip is supplied with each model. Supply Voltage +4.75 +5.00 +5.25 Volts Supply Current: TECHNICAL NOTES Standard Models – 800 1200 µA 1. +1.23V REFERENCE OUTPUT (Pin 9): This pin is the output of the Backlit Models – 45 60 mA meter’s precision +1.23V internal reference, and it is referenced to Power Supply Requirements (9V Models) ANALOG COMMON (pin 10) which sits at a potential of approximately Supply Voltage +7.5 +9.00 +14.0 Volts +2V. This output should be buffered if used to drive external loads Supply Current: since sourcing more than 15µA from pin 9 can affect both the initial accuracy and temperature drift of the meter. Standard Models – 350 600 µA Backlit Models – 45 60 mA 2. ANALOG COMMON (Pin 10): This pin is connected to an internal, low-noise, “relative” ground. It is used in certain differential and “fl oat- Display ing” measurements as described in the Applications section of this data Display Type and Size 3½ digit, 0.4"/10.2mm high LCD sheet and Ap Note DMS-AN3 at Polarity Indication Autopolarity ("–" for negative Vin) http://www.murata-ps.com/data/meters/dms-an3.pdf. Pin 10 should Overrange Indication "–1___" for negative inputs not be connected to pin 3 (5V RETURN/–BATTERY) or to your "1___" for positive inputs system’s analog ground. www.murata-ps.com/support MPM_DMS30LCD.E01 Page 2 of 6

DMS-30LCD Series 3½ Digit, LCD Display Digital Panel Voltmeters 3. Decimal Point Placement: The location of the decimal point is user- 8. Soldering Methods: All models in the DMS-30LCD Series easily selectable, and the decimal point control pins (DP1-DP3) are active low withstand most common wave soldering operations. We recommend, functions. Select the appropriate decimal point by tying the appropriate however, you evaluate the effects your particular soldering techniques pin (pin 4, 5 or 6) to pin 3 (5V RETURN/ may have on the meter’s plastic case and high-precision electrical –BATTERY). Unused decimal point location pins should be left open. performance. We recommend the use of no-clean lead-free solders. For 5V-powered models, the decimal location pins are TTL compatible 9. Suggested Mating Connectors: and may be hard wired as described above or driven with 5V TTL logic gates. Panel mounted: Connector housing Murata Power Solutions P/N 4320-01069-0 4. REFERENCE OUTPUT (Pin 8) and INPUT (Pin 7): Pin 8 is a preci- Terminal type Murata Power Solutions P/N 4400-01032-0 sion reference actively trimmed at the factory. In normal operation, pin 8 must be tied to pin 7 to achieve all listed accuracy and drift specifi ca- Wire size 22 to 26 AWG tions. Insulation diameter 0.062” (1.57mm) maximum Stripping length 0.100 to 0.125” (2.54 to 3.17mm) 5. DISPLAY TEST (Pin 2): (Not available on backlit models) Connect DISPLAY TEST (pin 2) to +5V SUPPLY/+BATTERY Board mounted: (pin 1) to activate. All LCD segments, exclusive of the decimal points, Socket Murata Power Solutions P/N 4320-01074-0 will be momentarily enabled. Do not leave the unit in the TEST mode for more than 10 seconds as this will damage the LCD seg- APPLICATIONS ments. DMS-30LCD meters are available in either 5V-powered or 9V-powered 6. BACKLIGHT (Pin 2) Function: For backlit models, grounding pin 2 models. 9V devices operate directly from 7.5V to 14V supplies (usually (i.e. connecting it to pin 3) turns on the backlighting LED’s. 9V-pow- batteries) without the need for external voltage regulators. 9V devices, ered backlit models function with supply voltages up to +14V, however, however, can not be used to measure voltages referenced to the negative activating the backlight with voltages greater than 9.2V can damage battery terminal (pin 3) because the minus input to the meter (pin 12, (–) the meter. Therefore, a 1/4 Watt series resistor must be installed INPUT LO) must always be at least 1.5V above pin 3. 9V-powered meters between pins 3 and 2 in these situations. The value of the series resis- can only be used to make differential and not single-ended measurements. tor is determined using the following formula: 5V-powered devices operate from any well-regulated +5V supply and will +BATTERY – 9.2V accurately measure voltages both above and below pin 3 (5V RETURN) in R = Ohms Series 0.035 either single-ended or differential confi gurations. Example: If +BATTERY (pin 1 with respect to pin 3) is +12.6V, 1. Single-Ended Input Confi gurations: True single-ended measure- +12.6 – 9.2V ments can only be made with 5V-powered meters. The circuit of Figure RSeries = Ohms 2 avoids problems normally associated with ground-loop currents. 0.035 Separate ground runs should be used for 5V RETURN (pin 3) and (–) R = 97 Ohms INPUT LO (pin 12). Series In any backlit application, including those with supply voltages DMS-30LCD-1-5 11 < 9.2V, the current drawn by the backlight (and therefore the current 8 + (+) IN HI REF OUT drawn by the meter) can be reduced by installing a 1/4 Watt resistor between pins 3 and 2. The brightness of the backlight will be reduced VIN proportionately. – 12 7 (–) IN LO REF IN 7. Gain Adjust: There is a gain-adjust potentiometer on the back of each 1 6 3 meter. It has approximately ±50 counts (±2.5%) of adjustment range. +5V SUP DP1 5V RET Since these devices essentially have no zero/offset errors, a gain adjustment is effectively an overall accuracy adjustment. Though they 120 VAC may be performed at any point (except zero), accuracy adjustments are most effective when performed with higher level input signals. AC to DC Converter Refer to Figure 9 for applications requiring greater ( ±10%) gain adjust- Figure 2. Single-Ended Input Confi guration ments. (5V-Powered Models) www.murata-ps.com/support MPM_DMS30LCD.E01 Page 3 of 6

DMS-30LCD Series 3½ Digit, LCD Display Digital Panel Voltmeters APPLICATIONS 2. Differential Input Confi gurations: Differential measurements can be 4. Floating Signal Source Measurements: Floating signals can be made with either 5V-powered or 9V-powered meters. Figure 3, though measured using the circuits shown in Figures 5 and 6. Figure 5 uses not a practical real-world application, uses a voltage divider to demon- a 5V-powered meter. Figure 6 uses a 9V-powered meter. Connecting strate the concept of a differential input signal. Be careful not to exceed pin 10 (ANALOG COMMON) to (–) INPUT LO (pin 12) provides the the ±2V common mode voltage limitation for 5V-powered meters. reference point for the meter’s input. A “fl oating” input is a signal that has no galvanic connection to the meter’s power supply. In the fi gures below, the 1.5V battery illustrates a true fl oating input. DMS-30LCD-1-5 R1 11 REF OUT 8 1k (+) IN HI DMS-30LCD-1-5 11 REF IN 7 R2 (+) IN HI 8REF OUT 12 1k DP1 6 (–) IN LO 1.5V + ANA COM1M0 CELL – R3 12 +5V SU1P 35V RET 1k (–) IN LO 7REF IN 1 3 6 +5V SUP 5V RET DP1 120 VAC 120 VAC AC to DC Converter Figure 3. Differential Input Confi guration AC to DC Converter (5V-Powered Models) Figure 5. Floating Input Measurements (5V-Powered Models) 3. Engineering Scaling: For measuring voltages greater than the full DMS-30LCD-1-9 scale input range of a given meter, the input signal must be attenuated. 11 8 A simple voltage divider (similar to that shown in Figure 4) will scale (+) IN HI REF OUT the input to within the range of the selected meter. R1 and R2 should 1.5V + ANA COM1M0 be precision, ±1%, metal-fi lm resistors with absolute TCR’s less than CELL – 50ppm/°C. See Ap Note 4 for more information on engineering scaling. 12 7 (–) IN LO REF IN 1 3 6 50kΩ < R1 + R2 < 10MΩ + BAT –BAT DP1 R2 + x V = Reading IN 9V R1 + R2 BATTERY – + Figure 6. Floating Input Measurements DMS-30LCD-1-5 (9V-Powered Models) R1 11 (+) IN HI 8 VIN REF OUT R2 5. Process Control (4-to-20mA) Measurements: In many common 12 (–) IN LO process-control applications, a 4-to-20mA current loop is used to – 7 REF IN transmit information. Because DMS-30LCD meters have such high 1 3 +5V SUP 5V RET input impedance, a simple shunt resistor across the meter’s input can be used to convert the loop current to a voltage. See Figure 7. The value of the shunt resistor is a function of the scaling requirements of 120 VAC the particular application and can be calculated using the following equation: AC to DC Converter Figure 4. Input Attenuation Circuit www.murata-ps.com/support MPM_DMS30LCD.E01 Page 4 of 6

DMS-30LCD Series 3½ Digit, LCD Display Digital Panel Voltmeters APPLICATIONS RShunt = R1 = VFsr/IFsr R2 = 0.1 (R1 + R2 + R3) Where: V = Full scale reading (in Volts) Fsr Therefore, the 9V battery voltage appears to the meter inputs as 0.9V. I = Relative full scale current (in Amps) Fsr With the decimal point moved to its DP2 position (pin 5 tied to pin 3), the meter reads 9.00 Volts. Example: For a meter with a 2V full scale input (1.999 full scale reading) and a desired full scale display reading of The circuit can be calibrated by fi rst measuring the actual battery volt- 1000 (with an input of 20mA), V = 1.000 Volts age with another meter and then adjusting the gain-adjust potentiom- Fsr eter on the back of the DMS-30LCD until a similar reading is obtained. R = 1.000V/(0.020 – 0.004)A Shunt If possible, the resistors in the divider should be ±1% metal-fi lm types RShunt = 1.000V/0.016A = 62.5 Ohms with TCR’s less than 50ppm/°C. To calibrate the circuit of Figure 7, perform the following: DMS-30LCD-1-9 1. With 4mA applied, adjust the 50kΩ potentiometer (R2) to R1 8 11 45.3k display a reading of "000" (assuming that is the desired REF OUT (+) IN HI reading). R2 12 10.1k 2. With 20mA applied, adjust the gain-adjust potentiometer on (–) IN LO 7 the back of the meter to display a reading of "1999". For different full REF IN R3 scale readings, alter the RShunt value accordingly. 1 3 5 45.3k +BAT –BAT DP2 + DMS-30LCD-1-5 9V 8 BATTERY + (+) IN HI REF OUT – ANA COMM Figure 8. Power Supply Monitor 4-20mA R1 7 (9V-Powered Models) (–) IN LO REF IN 1 3 R2 +5V SUP 5V RET – 7. External Gain Adjustment: Connect REFERENCE OUT 50k (pin 8) to REFERENCE IN (pin 7) for normal, factory calibrated, opera- 120 VAC tion. Use the +1.23V REFERENCE OUT (pin 9) for applications need- ing external gain adjustment. Figure 9 shows the wiring confi guration AC to DC Converter for each model. Calibration is performed with a precise, near-full-scale, input voltage. Figure 7. 4-to-20mA Current Loop Operation (5V-Powered Models) 11 DMS-30LCD (+) IN HI OUT 6. Power Supply Monitoring: A popular application for Murata Power VOLTAGE 3 Solutions’ low-power LCD meters is monitoring the supply voltage in 12CALIBRATOR 5V RET battery-operated portable equipment. Figure 8 demonstrates how a 12 COM 9V-powered DMS-30LCD can be used to monitor its own supply. The (–) IN LO meter used is the DMS-30LCD-1-9. A three-resistor voltage divider is 10 8 7 9 used to attenuate the battery voltage and also to satisfy the require- ANA COMM NC REF IN 1.23V REF ment that the input voltages applied to pins 12 and 11 be at least 1.5 For 5V models tie (–) IN LO to pin 3 8.45k, 1% Connections Volts above and below the battery voltage applied to pins 1 (+BAT- for ±2V and TERY) and 3 (–BATTERY). The divider should be designed so that 10 to 210k Turns ±20V models 1/10th the battery voltage falls across the inputs to the meter: For 9V models tie (–) IN LO to pin 10 Connections 1k 8.45k, 1% for ±200mV 10 to 20 Turns models Figure 9. External Gain Adjustment www.murata-ps.com/support MPM_DMS30LCD.E01 Page 5 of 6

DMS-30LCD Series 3½ Digit, LCD Display Digital Panel Voltmeters 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 PIN #1 IDENTIFIER RECOMMENDED PC BOARD FINISHED HOLE DIAMETER: 0.042 ±0.003 (1.067 ±0.076) ASU NI EDAM XX-X-DCL03-SMD CALIBRATION POTENTIOMETER HOLE LOCATION FRONT VIEW PIN 1 +5V SUPPLY/ +BATTERY 1 12(–) INPUT LO DISPLAY TEST/BACKLIGHT 2 11(+) INPUT HI 5V RETURN/ –BATTERY 3 10ANALOG COMMON (06..26600) DDPP32 45 98 +R1E.F23EVR ERNECFEER OEUNTCE OUT DP1 6 7 REFERENCE IN 0.240 (6.10) DP1 DP2 DP3 0.125 (3.175) DIAMETER 0.92 2.17 (USE ONLY WHEN PC BOARD MOUNTING) (23.4) (55.1) 0.84 2.09 (21.3) (53.1) 0.430 (10.92) STANDARD 0.040 0.560 (14.22) BACKLIT (1.02) 0.25 (6.4) TYP. 0.040 (1.02) T(04Y.1.3P7). 0.50 T(02Y.1.5P0). (01..00420) (14.58.07) T(03Y.1.7P5). (12.7) 0.187 #2-56 INSERT (4.75) BEZEL INSTALLATION FRONT VIEW 0.156 (3.96) DEEP 1.270 PANEL (32.26) ASU NI EDAM 2.55 (64.77) RECOMMENDED DRILL AND PANEL CUTOUT DIMENSIONS BEZEL 0.116 INTERNAL CORNER RADII: (2.95) 0.032 (0.81) MAX. RETAINING CLIP INSTALLATION (217.0.178) PANEL CUTOUT (20.28.7308) 2.118 (53.80) PANEL 2.35 (59.69) 0.096 0.093 (2.362) DIAMETER (4 REQUIRED) (2.44) ONLY WHEN USING OPTIONAL BEZEL ASSEMBLY This product is subject to the following operating requirements Murata Power Solutions, Inc. and the Life and Safety Critical Application Sales Policy: 11 Cabot Boulevard, Mansfi eld, MA 02048-1151 U.S.A. Refer to: http://www.murata-ps.com/requirements/ ISO 9001 and 14001 REGISTERED Murata Power Solutions, 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. Specifi cations are subject to change without notice. © 2015 Murata Power Solutions, Inc. www.murata-ps.com/support MPM_DMS30LCD.E01 Page 6 of 6

Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: M urata: DMS-30LCD-1-5B DMS-30LCD-1-9B DMS-30LCD-0-5B-C DMS-30LCD-0-5-C DMS-30LCD-0-9B-C DMS-30LCD-0- 9-C DMS-30LCD-1-5B-C DMS-30LCD-1-5-C DMS-30LCD-1-9B-C DMS-30LCD-1-9-C DMS-30LCD-2-5B-C DMS- 30LCD-2-5-C DMS-30LCD-2-9B-C DMS-30LCD-2-9-C DMS-30LCD-3-5B-C DMS-30LCD-3-5-C DMS-30LCD-3-9B-C DMS-30LCD-3-9-C DMS-30LCD-0-9B DMS-30LCD-0-5B DMS-30LCD-3-5B DMS-30LCD-3-9B DMS-30LCD-2-5B DMS-30LCD-0-5 DMS-30LCD-0-9 DMS-30LCD-2-9B DMS-30LCD-3-5 DMS-30LCD-3-9 DMS-30LCD-1-9 DMS- 30LCD-2-5 DMS-30LCD-2-9 DMS-30LCD-1-5