www.murata-ps.com DMS-20PC-2-LM Self-Powered LED Display High-Voltage, 50/60/400Hz AC Line Monitor C US E156931 FEATURES Murata Power Solutions DMS-20PC-2-LM is a component-size, self-contained, low- cost ac voltmeter speci cally designed for high-voltage or high-frequency operation. The Self-powered, two-terminal operation DMS-20PC-2-LMs unique power-supply circuitry Dual operating ranges: 240-310Vac at 50/60Hz or allows a single model to operate from either 240 to 85-140Vac at 400Hz 310Vac with 50/60Hz inputs or from 85 to 140Vac Half-wave averaging, rms calibrated with 400Hz inputs. The meter requires no external Large, easy-to-read, bright red LED display components or auxiliary power for full operation Its large, 0.37 /9.4mm, bright red LED display is easily Rugged, epoxy-encapsulated construction readable under virtually all lighting conditions. Built-in bezel for panel mounting DMS-20PC-2-LM employs half-wave sinusoidal Reliable screw terminals for easy installation averaging (rms calibrated) to achieve a display Small 1.38 x 0.88 x 1.0 package resolution of 1Vac over its full operating range. Packaged in a red- lter case with a built-in bezel, Approvals to UL/cUL/IEC/61010-1 the meter is epoxy encapsulated for ruggedness. This low-cost, extremely versatile digital volt- Functional Speci cations meter is ideal for use in emergency power equip- ment, 277Vac uorescent lighting systems, 400Hz Input aircraft installations, and any other application Voltage Range 240-310Vrms (47-99Hz) requiring accurate, high-voltage or high-frequency, 85-140Vrms (350-450Hz) ac line monitoring. Current Consumption 50mArms (max.) Typical panel mount installation Suggested wiring (user supplied) UL/IEC61010-1 Measurement category II Performance Sampling Rate 2.5 readings/second Ordering Information Measurement Type Half-wave average, rms calibrated for sinusoidal input DMS-20PC-2-LM-C High-voltage ac line monitor with screw terminals and screws Accuracy +25C 1V (typ.), 2V (max.) DMS-BZL3-C Panel mount bezel Temperature Drift DMS-BZL4-C Panel mount bezel with sealing gasket (25 to +60C) 0.15 Volts/C (max.) DMS-20-CP Panel cutout punch Mechanical Brass screws (6-32 thread) and a panel-mount retaining clip are supplied with each meter 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) Environmental Operating Temperature 25 to +60C Storage Temperature 40 to +75C Humidity (Non-condensing) 0 to 95% Operation and accuracy at inputs above or below this range are not speci ed. CURRENT LIMITED AC SUPPLY For full details go to Typical Connection Diagram www.murata-ps.com/rohs www.murata-ps.com/support MPM DMS-20PC-2LM.C01 Page 1 of 2DMS-20PC-2-LM Self-Powered LED Display High-Voltage, 50/60/400Hz AC Line Monitor Power Supply Polarity, Fusing, Wiring, and Grounding: DMS-20PC-2-LMs nal circuitry they must not be used to supply power to external loads. Depend- two ac-supply terminals are not polarity sensitive, that is, they have no AC LO ing on the ac supply line-voltage in the users installation, the supply wires or AC HI designations. These units do not include nor require a connection to feeding these voltmeters must be fused with a 0.25A/250V or a 0.25A/600V earth/chassis ground. time delay/time lag fuse, in accordance with applicable regulatory codes. 2 2 All ac-supply wiring must be rated for the voltages and currents they will The recommended wire size is 16AWG to 20AWG (1.31mm to 0.52mm ) conduct and comply with any code or application-mandated requirements stranded copper wire. Wires must be properly stripped and attached to the pertaining to the users speci c installation. 300V UL rated wire suitable for the threaded standoffs such that their insulation is not pinched by the supplied intended application is required. 6-32 screws. Rated tightening torque for the 6-32 screws is 7 to 8 pound- inches (0.8 to 0.9N-m). DMS-20PC-2-LM ac voltmeters are not internally fused. The rear threaded standoff input-terminals are to be used only for powering the voltmeters inter- 1. Description of safety marks: Caution, risk of electrical shock Caution, risk of danger Equipment is protected throughout by double or reinforced insulation 2. Cleaning Instructions: Gently clean with dry cloth only. 3. Caution: if the equipment is used in a manner not speci ed by Murata Power Solutions, the protection provided by the equipment may be impaired. 1.30 (33.0) 0.04 (1.016) 0.04 0.04 1.38 (1.016) (1.016) 6-32 (35.1) UNC THD 0.44 (11.2) 0.80 0.88 0.37 (20.3) (22.4) (9.4) 0.75 0.32 1.00 (19.1) (8.1) (25.4) 0.19 2-56 INSERT (4.8) 0.156 (3.96) DEEP Dimensions in inches (millimeters) Tolerances: 2 PL Dec 0.02 (0.51) 3 PL Dec 0.010 (0.254) Recommended panel cutout dimensions: DMS-BZL3-C 1.07 1.28 Optional Bezel 1.336 (33.93)W 0.838 (21.29)H (27.2) (32.5) Internal corner radii 0.032 (0.81) Max. 0.10 1.63 (41.4) 0.10 (2.5) (2.5) 1.83 (46.5) 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, Mans eld, MA 02048-1151 U.S.A. Refer to: