DMS-20PC-3-LM Self-Powered LED Display 480V AC Line Monitor DATEL’s DMS-20PC-3-LM is a low-cost, self-powered, 2-wire digital voltmeter designed for monitoring 480Vac 3-phase primary power. The DMS-20PC-3-LM’s unique power-supply design allows a single model to operate from 350 to 600Vac (47-63Hz). The meter requires no external components or auxiliary power for full operation! Its large, 0.37˝/9.4mm, bright red LED display is easily readable under virtually all lighting conditions. DMS-20PC-3-LM employs rms calibrated, halfwave sinusoidal averaging to achieve a display resolution of 1Vac over its full operating range. Packaged in a subminiature (1.38˝ x 0.88˝ x 1.0˝) red-filter case with a built-in bezel, the meter is epoxy encapsulated for ruggedness. An optional bezel assembly, featuring metal fasteners, simplifies panel mounting. This easy-to-use, vibration-proof voltmeter is the ideal digital upgrade for fragile analog-style panel meters in 480Vac power distribution equipment. It similarly excels in any new application requiring accurate, high-voltage, ac line monitoring. FEATURES N Self-powered, two-terminal operation N 350 to 600Vac operating input range N Half-wave averaging, rms calibrated N Large, easy-to-read, bright red LED display N Rugged, epoxy-encapsulated construction N Built-in bezel for panel mounting N Reliable screw terminals for easy installation N Small 1.38˝ x 0.88˝ x 1.0˝ package Functional Specifications Input Voltage Range ~ Current Consumption Performance Sampling Rate Measurement Type Accuracy @ +25°C Temperature Drift (–25 to +60°C) Mechanical Dimensions Display Type Weight Case Material Environmental Operating Temperature Storage Temperature Humidity (Non-condensing) 350-600Vrms (47-63Hz) 50mArms (max.) Typical panel mount installation Suggested wiring (User supplied) 2.5 readings/second Half-wave average, rms calibrated for sinusoidal input ±1V (typ.), ±2V (max.) Ordering Information ±0.15 Volts/°C (max.) 1.38˝ x 0.88˝ x 1.00˝ 3 digit, red LED, 0.37˝/9.4mm 1 ounce (28 grams) Polycarbonate DMS-20PC-3-LM-C DMS-BZL3-C DMS-BZL4-C DMS-20-CP 350-600Vac line monitor with screw terminals and screws Panel mount bezel Panel mount bezel with sealing gasket Panel cutout punch Brass screws (6-32 thread) and a panel-mount retaining clip are supplied with each meter –25 to +60°C –40 to +75°C 0 to 95% ~ Operation and accuracy at inputs above or below this range are not specified. For full details go to www.murata-ps.com/rohs www.murata-ps.com Technical enquiries email: [email protected], tel: +1 508 339 3000 MPM_DMS-20PC-3LM_D02 Page 1 of 2 DMS-20PC-3-LM Self-Powered LED Display 480V AC Line Monitor 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. 1.30 (33.0) DMS-20PC-3-LM ® ® 0.04 (1.016) 0.04 (1.016) 0.04 (1.016) #6-32 UNC THD 0.44 (11.2) 0.80 (20.3) 0.32 (8.1) 0.75 (19.1) 0.88 (22.4) 0.37 (9.4) 1.00 (25.4) #2-56 INSERT 0.156 (3.96) DEEP 0.19 (4.8) 1.28 (32.5) 1.07 (27.2) 0.10 (2.5) 1.38 (35.1) 0.10 (2.5) 1.63 (41.4) 1.83 (46.5) USA: Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356 www.murata-ps.com email: [email protected] ISO 9001 and 14001 REGISTERED 11/24/08 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. © 2008 Murata Power Solutions, Inc. www.murata-ps.com Mansfield (MA), Tel: (508) 339-3000, email: [email protected] Canada: Toronto, Tel: (866) 740-1232, email: [email protected] UK: Milton Keynes, Tel: +44 (0)1908 615232, email: [email protected] France: Montigny Le Bretonneux, Tel: +33 (0)1 34 60 01 01, email: [email protected] Germany: München, Tel: +49 (0)89-544334-0, email: [email protected] Japan: Tokyo, Tel: 3-3779-1031, email: [email protected] Osaka, Tel: 6-6354-2025, email: [email protected] China: Shanghai, Tel: +86 215 027 3678, email: [email protected] Guangzhou, Tel: +86 208 221 8066, email: [email protected] Singapore: Parkway Centre, Tel: +65 6348 9096, email: [email protected] Technical enquiries email: [email protected], tel: +1 508 339 3000 MPM_DMS-20PC-3LM_D02 Page 2 of 2