www.murata-ps.com DMS-20PC-FM Series Self-Powered, 3-Digit LED Display AC Line Frequency Monitors FEATURES Murata Power Solutions DMS-20PC-FM Series are the worlds smallest, self-powered, ac frequency meters. Simply connect the ac line to the two rear input terminals, and the Self-powered, no external supplies required unit is fully operational with no additional components or auxiliary power required Two, 3 models: 47.0-99.0Hz (85-140Vac) 50/60Hz models operate over input voltage ranges of 85-140Vac or 170-264Vac. A third, 47.0-99.0Hz (170-264Vac) 400Hz model operates over an input voltage range of 85-140Vac. Despite their small size 350-450Hz (85-140Vac) (1.38 x 0.88 x 1.0 ), DMS-20PC-FM meters feature large 0.40 /10.2mm red LEDs that Screw terminals simplify panel mounting can be read easily from 15 feet away. DMS-20PC-1-FM-F An ultra-stable, quartz-crystal-controlled, (Blade Terminals) Ideal for emergency power equipment embedded microcomputer provides accuracies 8C48 Small 1.38 x 0.88 x 1.0 packages of 0.1Hz (50/60Hz models) or 1.0Hz (400Hz Epoxy encapsulated for harsh environments model) over the entire operating temperature range of 25 to +60C. Epoxy encapsulated Large (0.40 /10.2mm) red LED displays plastic packages provide excellent protec- C US E156931 tion against the harsh environments normally encountered by emergency backup power gen- Functional Speci cations erators. DMS-20PC-FM meters are the exact same DMS-20PC-1-FM Input size as Murata Power Solutions popular AC Line (Panel Mount) Freq. Range (Voltage Range): Voltage Monitors (models DMS-20PC-X-LM). DMS-20PC-1-FM 47.0-99.0Hz (85-140Vac) Suggested wiring (user supplied) DMS-20PC-2-FM 350-450Hz (85-140Vac) DMS-20PC-3-FM 47.0-99.0Hz (170-264Vac) Current Consumption 50mArms (max.) UL/IEC61010-1 Measurement Category II Ordering Information Performance DMS-20PC-1-FM-C 47-99Hz / 120Vac frequency monitor with threaded standoffs Sampling Rate 4 readings/second DMS-20PC-1-FM-F-C 47-99Hz / 120Vac frequency monitor with blade terminals Accuracy (25 to +60C): DMS-20PC-2-FM-C 350-450Hz / 120Vac frequency monitor with threaded standoffs DMS-20PC-1/3-FM 0.1Hz DMS-20PC-3-FM-C 47-99Hz / 220Vac frequency monitor with threaded standoffs DMS-20PC-2-FM 1.0Hz DMS-20-CP Optional panel cutout punch DMS-BZL3-C Optional panel mount bezel Mechanical DMS-BZL4-C Optional panel mount bezel with sealing gasket Dimensions 1.38 x 0.88 x 1.00 Display Type 3 digit, red LED, Brass screws (6-32 thread) and a panel-mount retaining clip are supplied with meter. 0.4 /10.2mm 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 these ranges 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-FM.H01 Page 1 of 2DMS-20PC-FM Series Self-Powered, 3-Digit LED Display AC Line Frequency Monitors Power Supply Polarity, Grounding, Fusing, and Wiring 1. Polarity and Grounding: 3. UL Listed Models with Plug-in Blade Terminals: DMS-20PC-FMs 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 Plug-in DMS-20PC-1-FM-XF models are not internally fused and must be rated for the voltages and currents they will conduct and comply with any code protected by an external current limiting circuit breaker or fuse in accordance or application-mandated requirements pertaining to the users speci c installa- with applicable regulatory codes. These models are designed to be plugged tion. Additional model-speci c information is provided below. 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: Caution, risk of electrical shock C 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 Equipment is protected throughout by double or reinforced insulation lag fuse, in accordance with applicable regulatory codes. The rear threaded standoff input-terminals are to be used only for powering the meters internal 5. Cleaning Instructions: Gently clean with dry cloth only. circuitry they must not be used to supply power to external loads. 2 2 6. Caution: if the equipment is used in a manner not speci ed by Murata The recommended wire size is 16AWG to 20AWG (1.31mm to 0.52mm ) Power Solutions, the protection provided by the equipment may be stranded copper wire. Wires must be properly stripped and attached to the impaired. 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 pound- inches (0.8 to 0.9N-m). 300V UL rated wire suitable for the intended applica- tion is required. 1.30 (33.0) 0.04 (1.016) 0.04 (1.016) 1.38 6-32 (35.1) UNC THD 0.44 (11.2) 0.80 0.88 0.44 (20.3) (20.4) (10.2) 0.32 0.75 1.00 (19.1) (8.1) (25.4) 0.44 2-56 INSERT (10.2) 0.156 (3.96 DEEP 1.07 0.44 Dimensions in inches (millimeters) (10.2) (27.2) 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. 0.10 0.10 1.63 (41.1) (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: