DMR30-DCA1 Series Miniature DC Shunt Ammeter PRODUCT OVERVIEW The DMR30-DCA1 digital panel meter performs precision DC current measurements when used in conjunction with an external shunt resistor, with selectable ranges from +/-1A to +/-1200A. This meter features a highly visible, 0.45 (11.4mm) high, 5 character + sign alphanumeric LED display which can provide up to 4 digits of measurement resolution. Configuration is made easy by a contactless touch- sensor front-panel user interface, eliminating the need for jumpers, potentiometers, or DIP switches. The meter is powered from an external 9-32VDC supply and typically requires only 40mA when operated at 12V. The measurement inputs provide +/-48V of common mode input range, simplifying both high and low-side current measurements. An isolated solid-state relay can be set to close at user-defined trip- points, providing external signaling capability. The meter features a rugged polycarbonate housing that is mountable in a round hole using the supplied nut and gasket, or by using 3 4-40 (M3) screws. The DMR30-DCA1 s features make it ideal for use in laboratory instrumentation, factory automation, and other applications requiring precise DC current monitoring. Features ORDERING INFORMATION: Supports external shunt DMR30-DCA1-1-DC4-R-C DC shunt ammeter, alarm output, red display resistors from 1A to 1200A DMR30-DCA1-1-DC4-G-C * DC shunt ammeter, alarm output, green display Supports both +/-50mV and DMR30-DCA1-1-DC4-B-C * DC shunt ammeter, alarm output, blue display +/-100mV shunt resistors *Contact factory for availability. Bright 0.45 (11.4mm) LED display visible up to 20 feet ACCESSORIES: (6 meters) Shunt Resistors Long-life contactless touch- Murata Model Full-scale Amps / Output Voltage Nominal Resistance (ms at 25C) sensor controls 3020-01097-0 5A / 50mV 10 Peak and valley 3020-01107-0 10A / 100mV 10 measurement modes 3020-01098-0 20A / 50mV 2.5 Digital filter option for 3020-01096-0 50A / 50mV 1 measurements in noisy 3020-01099-0 100A / 50mV 0.5 environments 3020-01108-0 100A / 100mV 1 Solid-state alarm relay with 3020-01100-0 150A / 50mV 0.33 programmable trip-point and 3020-01101-0 200A / 50mV 0.25 hysteresis 3020-01102-0 300A / 50mV 0. 167 Convenient mounting 3020-01103-0 500A / 50mV 0. 1 options 3020-01104-0 800A / 50mV 0.0625 Operates from 9VDC to 3020-01105-0 1000A / 50mV 0.05 32VDC 3020-01106-0 1200A / 50mV 0.0417 Low current consumption 40mA typical at 12VDC SIMPLIFIED BLOCK DIAGRAM Two year warranty DMR30-DCA ALPHANUMERIC DISPLAY CURRENT SHUNT AND ANNUNCIATORS INPUTS ALARM MAX MIN +IMON (5) ADC -IMON (6) TOUCH SENSOR KEYPAD MICROCONTROLLER RESET MENU MODE RELAY Solid State POWER OUTPUTS Relay INPUTS (1) RELAYB PTC Fuse +VS (3) 3.3V DC-DC -3.3V (2) RELAYA -VS (4) For full details go to www.murata-ps.com/rohs www.murata-ps.com/support DMR30-DCA1.A01 Page 1 of 11 DMR30-DCA1 Series Miniature DC Shunt Ammeter PERFORMANCE AND FUNCTIONAL SPECIFICATIONS (typical Ta= 25C, Vsupply=12VDC, Range = 20A, Display Format = 99999 unless otherwise noted) Measurement Performance Min Typ Max Units Measurement Ranges 20 settings from 1A through A 1200A Accuracy 0.1 0.2 % F.S. Temperature Stability: 0.005 %F.S./C Input Impedance 10 k Common Mode Rejection Ratio (DC) 100 dB Absolute Maximum input voltage (+IMON to IMON) -30 +30 V Absolute Maximum common-mode voltage (either +IMON or IMON to VS) -48 48 V Power Supply Characteristics Min Typ Max Units Operating Supply Voltage 9 32 VDC Absolute Maximum Supply Voltage -1 34 VDC Operating Supply Current 12V operation 40 mA 24V operation 25 mA USER INTERFACE 5 Character+sign LED, 11.4mm (0.45in) Height Display Type and Size 3 LED Annunciators (Alarm,Max,Min) Four capacitive touch sensors User Controls <UP> <DOWN> <LEFT> <RIGHT> Display Modes Normal, Max Current, Min Current Over-range Indication Flashing Value Display Update Rate 2.5 updates/sec. Decimal Point Selection Automatically Set Main Menu Password <RIGHT> <UP> <RIGHT> <UP> <RIGHT> RELAY OUTPUT Min. Typ. Max. Units Off-state voltage (measured across RELAYA to RELAYB) terminals -40 +40 V On-state current -250 250 mA On state resistance 1 TERMINAL BLOCKS (TB1, TB2, TB3) Wire Size 14-24 AWG Insulation Strip Length 6mm (0.24 in.) Screw Tightening Torque 0.4 N-m (3.5 lb-in) PHYSICAL/ENVIRONMENTAL Min. Typ. Max. Units Operating Temperature 0 +50 C Storage Temperature -40 +75 C Humidity (non-condensing) 0 85 % Dimensions See Mechanical Specifications Drawing Weight 64g (2.2 oz.) www.murata-ps.com/support DMR30-DCA1.A01 Page 2 of 11