DMS-EB-DC/DC-C

DMS-EB-DC/DC www.murata-ps.com DC/DC Converter and Isolation Board for DMS-30PC/LCD Meters Description: The DMS-EB-DC/DC Application Board provides isolated +5V power for FEATURES Murata Power Solutions DMS-30PC/LCD Series, 3 Digit, LED/LCD Display, Digital Panel Provide isolated +5V power for DMS-30 Series meters Voltmeters. This add-on board is ideal for applications requiring isolation (up to 750V) 750V minimum isolation between the input signal and the meter's +5V supply. Features: The DMS-EB-DC/DC is an excellent choice for dc ammeter applications. Ideal for high-side dc ammeters shunts These ammeters typically have the current shunt located on the positive side of the power Provisions for +12V operation supply a condition which usually exceeds the meter's common mode voltage limit. Input-to-output isolation is required if the power source being measured also powers the Includes all the features of the standard DMS-EB board DMS-30. See dc ammeters application note DMS-AN6 at Use with all DMS-30PC and DMS-30LCD DMS-EB-DC/DC DC/DC Converter and Isolation Board for DMS-30PC/LCD Meters 12 1 () INPUT LO +VOUT +VIN +5V SUPPLY/ +BATTERY C3 SG10 + SG14 22 F R2 U1 10V 11 2 TEST/ -VOUT (+) INPUT HI -VIN BACKLIGHT R1 10 ANALOG R6 COMMON 4.7k R3 R4 3 SG9 SG7 5V RETURN/ 10.5k 2k BATTERY C4 SG3 +VOUT 0.1 F 9 4 +1.23V SG11 SG6 SG4 50V DP 3 REF. OUT  U2 SG8 SG2 5 8 +VIN REF. OUT LM7805CT DP 2 R5 SG13 50k SG1 7 6 C2 REF. IN DP 1 0.22 F SG5 SG12 50V J1 Components are user-supplied  and not part of the standard product Open solder gap Components are part of the resistor accessory  12 34 5 6 kit RN-DMS (see Ordering Information). Closed solder gap HI LO TST TST +V V (+) () IN OUT GND Figure 1. DMS-EB-DC/DC Schematic Diagram 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: