DMS-20PC-1-LM-C

## **www.murata-ps.com** 

## **- - - DMS 20PC 1 LM** 

Self-Powered 3 Digit, LED Display AC Line Voltage Monitors 

## **FEATURES** 

- Plugs directly into USA-style wall outlets 

- Screw terminals for panel mounting 

- Small 1.38" x 0.88" x 1.0" packages 

- Large, easy-to-read, red, blue or green LED displays 

- Fully encapsulated for harsh environments 

- Half-wave averaging, rms calibrated 

- UL, CSA and IEC1010-1 certifi ed 

- Very low cost! 

## Po 

## **Functional Specifi cations** 

## **Input** 

Voltage Range ➀ 85-264Vrms UL/IEC61010-1 Measurement Category II Frequency Range ➀ 47-63Hz Current Consumption 50mArms (max.) 

## **Performance** 

Sampling Rate 2.5 readings/second Measurement Type Half-wave average, rms calibrated for sinusoidal input Accuracy @ +25°C ±1V (typ.), ±2V (max.) Temperature Drift (–25 to +60°C) ±0.15 Volts/°C (max.) 

## **Mechanical** 

Dimensions 1.38" x 0.88"  x 1.00" Display Type 3 digit, red LED, 0.37"/9.4mm Weight 1 ounce (28 grams) Case Material Polycarbonate 6-32 screw torque 6-8 in-lb (0.7 – 0.9N-m) 

Murata Power Solutions’ DMS-20PC-1-LM is a component-size, self-contained, low-cost ac voltmeter for true line measurements. It requires no additional components or auxiliary power. Simply plug it into any wall outlet and instantly read voltages from 85 to 264Vac (47-63Hz). The large (0.37"/9.4mm), bright red, blue or green LED display makes the DMS-20PC-1-LM easily readable under any lighting conditions. 

DMS-20PC-1-LM employs half-wave sinusoidal averaging (rms calibrated) and has a display resolution of 1Vac over its full input range. Packaged in a red-fi lter case with builtin bezel, the meter is fully encapsulated for ruggedness. All units are overvoltage protected to 300Vac. 

**DMS-20PC-1-LM-F** (Blade Terminals) 

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**C® US E156931** yo bY eso oles **DMS-20PC-1-LM** (Panel Mount) Suggested wiring (user supplied) 

This low-cost meter is ideal for industrial, laboratory, offi ce and fi eld-service applications. Its miniature size is perfect for design into high-end consumer electronics, laboratory instrumentation and other products requiring accurate ac line monitoring. 

## ~~Lo~~ **Ordering Information** 

**DMS-20PC-1-LM-C Red LED with threaded standoffs** ➁ **DMS-20PC-1-LM-B-C Blue LED with threaded standoffs** ➁ **DMS-20PC-1-LM-G-C Green LED with threaded standoffs** ➁ **DMS-20PC-1-LM-F-C Red LED with blade terminals DMS-20PC-1-LM-BF-C Blue LED with blade terminals DMS-20PC-1-LM-GF-C Green LED with blade terminals DMS-20-CP Optional panel cutout punch DMS-BZL3-C Optional panel mount bezel DMS-BZL4-C Optional panel mount bezel with sealing gasket** 

➁ Brass screws (6-32 thread) and a panel-mount retaining clip are supplied with meter. 

## **Environmental** 

Operating Temperature –25 to +60°C Storage Temperature –40 to +75°C Humidity (Non-condensing) 0 to 95% 

➀ Operation and accuracy at inputs above or below these ranges are not specifi ed. 

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**MPM_DMS-20PC-1-LM.D01** Page 1 of 2 

## **- - - DMS 20PC 1 LM** 

## Self-Powered 3 Digit, LED Display AC Line Voltage Monitors 

## **Power Supply Polarity, Grounding, Fusing, and Wiring** 

## **1. Polarity and Grounding:** 

## **3. UL Listed Models with “Plug-in” Blade Terminals:** 

DMS-20PC-1-LM’s two ac-supply input terminals are not polarity sensitive, that is, they have no “AC LO” or “AC HI” designations. These units do not include nor require a connection to earth/chassis ground. All ac-supply wiring must be rated for the voltages and currents they will conduct and comply with any code or application-mandated requirements pertaining to the user’s specifi c installation. Additional model-specifi c information is provided below. 

Plug-in DMS-20PC-1-LM-XF models are not internally fused and must be protected by an external current limiting circuit breaker or fuse in accordance with applicable regulatory codes. These models are designed to be plugged into NEMA 1-15R, NEMA 5-15R, and NEMA 5-20R receptacles. 

## **2. UL Recognized Panel Mount Models with Screw Terminals:** 

## **4. Description of the safety marks:** 

## **C® US E156931** Wi 

Caution, risk of electrical shock 

Caution, risk of danger 

DMS-20PC-1-LM AC voltmeters are not internally fused. The supply wires feeding these voltmeters must be fused with a 0.25A/250V time delay/time lag fuse, in accordance with applicable regulatory codes. The rear threaded standoff input-terminals are to be used only for powering the voltmeter’s internal circuitry; they must not be used to supply power to external loads. The recommended wire size is 16AWG to 20AWG (1.31mm[2] to 0.52mm[2] ) stranded copper wire. Wires must be properly stripped and attached to the threaded standoffs such that their insulation is not pinched by the supplied 6-32 screws. Rated tightening torque for the 6-32 screws is 7 to 8 poundinches (0.8 to 0.9N-m). 300V UL rated wire suitable for the intended application is required. 

Equipment is protected throughout by double or reinforced insulation 

## **5. Cleaning Instructions: Gently clean with dry cloth only.** 

**6. Caution: if the equipment is used in a manner not specifi ed by Murata Power Solutions, the protection provided by the equipment may be impaired.** 

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1.30<br>(33.0)<br>fr<br>0.04<br>(1.016)<br>+ |<br>0.04 0.04<br>#6-32 (1.016) (1.016) 1.38<br>UNC THD (35.1)<br>a<br>0.44<br>(11.2) 0.80 0.88 0.37<br>(20.3) (22.4) (9.4)<br>0.75 0.32 1.00<br>(19.1) LK (8.1)  - (25.4) —<br>0.19<br>#2-56 INSERT (4.8)<br>0.156 (3.96) DEEP<br>i % a<br>1.07 DMS-BZL3-C 1.28<br>(27.2) Optional Bezel (32.5)<br>Dimensions in inches (millimeters)<br>Tolerances: 2 PL Dec ±0.02 (±0.51)<br>3 PL Dec ±0.010 (±0.254)<br>0.10<br>0.10 1.63 (41.4) (2.5) Recommended panel cutout dimensions:<br>(2.5) 1.336 (33.93)W × 0.838 (21.29)H<br>1.83 (46.5)<br>Internal corner radii 0.032 (0.81) Max.<br>DMS-20PC-1-LM<br>**----- End of picture text -----**<br>


Murata Power Solutions, Inc. 

11 Cabot Boulevard, Mansfi eld, MA 02048-1151 U.S.A. ISO 9001 and 14001 REGISTERED 

**This product is subject to the following operating requirements and the Life and Safety Critical Application Sales Policy:** ~~Do~~ **Refer to: http://www.murata-ps.com/requirements/** 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.**_ 

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