DMS-20PC-1-LM www.murata-ps.com 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 certified Very low cost! Murata Power Solution's 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 DMS-20PC-1-LM-F sinusoidal averaging (rms calibrated) and has (Blade Terminals) a display resolution of 1Vac over its full input 8C48 range. Packaged in a red-filter case with builtin bezel, the meter is fully encapsulated for ruggedness. All units are overvoltage protected to 300Vac. This low-cost meter is ideal for industrial, laboratory, office and field-service applications. Its miniature size is perfect for design DMS-20PC-1-LM into high-end consumer electronics, laboratory (Panel Mount) instrumentation and other products requiring accurate ac line monitoring. Suggested wiring (user supplied) ® C Functional Specifications Input Voltage Range ➀ UL/IEC61010-1 Frequency Range ➀ Current Consumption 85-264Vrms Measurement Category II 47-63Hz 50mArms (max.) ® US E156931 Ordering Information Performance Sampling Rate Measurement Type 2.5 readings/second Half-wave average, rms calibrated for sinusoidal input ±1V (typ.), ±2V (max.) Accuracy @ +25°C Temperature Drift (–25 to +60°C) ±0.15 Volts/°C (max.) Mechanical Dimensions Display Type Weight Case Material 6-32 screw torque 1.38" x 0.88" x 1.00" 3 digit, red LED, 0.37"/9.4mm 1 ounce (28 grams) Polycarbonate 6-8 in-lb (0.7 – 0.9N-m) DMS-20PC-1-LM-C DMS-20PC-1-LM-B-C DMS-20PC-1-LM-G-C DMS-20PC-1-LM-F-C DMS-20PC-1-LM-BF-C DMS-20PC-1-LM-GF-C DMS-20-CP DMS-BZL3-C DMS-BZL4-C Red LED with threaded standoffs ➁ Blue LED with threaded standoffs ➁ Green LED with threaded standoffs ➁ Red LED with blade terminals Blue LED with blade terminals Green LED with blade terminals Optional panel cutout punch Optional panel mount bezel 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 specified. CURRENT LIMITED AC SUPPLY For full details go to www.murata-ps.com/rohs Typical Connection Diagram www.murata-ps.com/support MPM_DMS-20PC-1-LM.C08 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: 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 specific installation. Additional model-specific information is provided below. 3. UL Listed Models with “Plug-in” Blade Terminals: 2. UL Recognized Panel Mount Models with Screw Terminals: 4. Description of the safety marks: Caution, risk of electrical shock C ® 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. US E156931 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 (1.31mm2 to 0.52mm2) 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. Caution, risk of danger 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 specified by Murata Power Solutions, the protection provided by the equipment may be impaired. 1.30 (33.0) DMS-20PC-1-LM ® ® 0.04 (1.016) 0.04 (1.016) #6-32 UNC THD 0.44 (11.2) 0.75 (19.1) 0.80 (20.3) 0.32 (8.1) 0.88 (22.4) ISO 9001 and 14001 REGISTERED 1.38 (35.1) 0.37 (9.4) 1.00 (25.4) #2-56 INSERT 0.156 (3.96) DEEP 1.07 (27.2) DMS-BZL3-C Optional Bezel 0.10 (2.5) 1.63 (41.4) Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. 0.04 (1.016) 0.19 (4.8) 1.28 (32.5) 0.10 (2.5) Dimensions in inches (millimeters) Tolerances: 2 PL Dec ±0.02 (±0.51) 3 PL Dec ±0.010 (±0.254) Recommended panel cutout dimensions: 1.336 (33.93)W × 0.838 (21.29)H Internal corner radii 0.032 (0.81) Max. 1.83 (46.5) 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. Specifications are subject to change without notice. © 2013 Murata Power Solutions, Inc. www.murata-ps.com/support MPM_DMS-20PC-1-LM.C08 Page 2 of 2