DMS-20PC-FM Series www.murata-ps.com Self-Powered, 3-Digit LED Display AC Line Frequency Monitors FEATURES ■ Self-powered, no external supplies required ■ 3 models: ■ Screw terminals simplify panel mounting ■ Ideal for emergency power equipment ■ Small 1.38" x 0.88" x 1.0" packages ■ Epoxy encapsulated for harsh environments ■ Large (0.40"/10.2mm) red LED displays 47.0-99.0Hz (85-140Vac) 47.0-99.0Hz (170-264Vac) 350-450Hz (85-140Vac) DATEL's new DMS-20PC-FM Series are the world’s smallest, self-powered, ac frequency meters. Simply connect the ac line to the two rear input terminals, and the unit is fully operational with no additional components or auxiliary power required! Two, 50/60Hz models operate over input voltage ranges of 85-140Vac or 170-264Vac. A third, 400Hz model operates over an input voltage range of 85-140Vac. Despite their small size (1.38" x 0.88" x 1.0"), DMS-20PC-FM meters feature large 0.40"/10.2mm red LED's that can be read easily from 15 feet away. DMS-20PC-1-FM-F (Blade Terminals) An ultra-stable, quartz-crystal-controlled, embedded microcomputer provides accuracies 8C48 of ±0.1Hz (50/60Hz models) or ±1.0Hz (400Hz model) over the entire operating temperature range of –25 to +60°C. Epoxy encapsulated plastic packages provide excellent protection against the harsh environments normally encountered by emergency backup power generators. DMS-20PC-FM meters are the exact DMS-20PC-1-FM same size as DATEL's popular AC Line Voltage (Panel Mount) Monitors (models DMS-20PC-X-LM). ® Functional Specifications Input Freq. Range (Voltage Range): ➀ DMS-20PC-1-FM DMS-20PC-2-FM DMS-20PC-3-FM Current Consumption 47.0-99.0Hz (85-140Vac) 350-450Hz (85-140Vac) 47.0-99.0Hz (170-264Vac) 50mArms (max.) UL/IEC61010-1 Measurement Category II Performance Sampling Rate Accuracy (–25 to +60°C): DMS-20PC-1/3-FM DMS-20PC-2-FM Mechanical Dimensions Display Type 4 readings/second ±0.1Hz ±1.0Hz Weight Case Material 6-32 screw torque 1.38" x 0.88" x 1.00" 3 digit, red LED, 0.4"/10.2mm 1 ounce (28 grams) Polycarbonate 6-8 in-lb (0.7 – 0.9N-m) Environmental Operating Temperature Storage Temperature Humidity (Non-condensing) –25 to +60°C –40 to +75°C 0 to 95% C ® US E156931 Suggested wiring (user supplied) Ordering Information DMS-20PC-1-FM-C DMS-20PC-1-FM-F-C DMS-20PC-2-FM-C DMS-20PC-3-FM-C DMS-20-CP DMS-BZL3-C DMS-BZL4-C 47-99Hz / 120Vac frequency monitor with threaded standoffs ➁ 47-99Hz / 120Vac frequency monitor with blade terminals 350-450Hz / 120Vac frequency monitor with threaded standoffs ➁ 47-99Hz / 220Vac frequency monitor with threaded standoffs ➁ 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. 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-FM.G06 Page 1 of 2 DMS-20PC-FM Series Self-Powered, 3-Digit LED Display AC Line Frequency Monitors Power Supply Polarity, Grounding, Fusing, and Wiring 1. Polarity and Grounding: DMS-20PC-FM’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-FM-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 Caution, risk of danger DMS-20PC-FM AC frequency meters are not internally fused. The supply wires feeding these meters 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 meter’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. 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) 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) 1.38 (35.1) 0.44 0.88 (20.4) (10.2) 1.00 (25.4) 0.44 (10.2) #2-56 INSERT 0.156 (3.96 DEEP 1.07 (27.2) DMS-BZL3-C Optional Bezel 0.10 (2.5) 1.63 (41.1) 0.44 (10.2) 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. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. 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. Specifications are subject to change without notice. © 2013 Murata Power Solutions, Inc. www.murata-ps.com/support MPM_DMS-20PC-FM.G06 Page 2 of 2