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| DMS-EB-DC/DC DC/DC Converter and Isolation Board for DMS-30PC/LCD Meters FEATURES Provide isolated +5V power for DMS-30 Series meters 750V minimum isolation Ideal for high-side dc ammeters shunts Provisions for +12V operation Includes all the features of the standard DMS-EB board Use with all DMS-30PC and DMS-30LCD (5V models only) -25 to +60C operating temperature range Functional Specifications TA = 25C, VCC = +5V Input Voltage Input Current: Typical Maximum Regulator Input Voltage Range (LM7805CT): DMS-30PC-X-XS DMS-30PC-X-RL DMS-30LCD-X-5(B) Output Voltage Isolation Operating Temperature Storage Temperature Dimensions: Humidity (Non-condensing) +5V (5%) +150mA +250mA +7.5 to +9.5Vdc +7.5 to +18Vdc +7.5 to +18Vdc +5V (5%) 750V, minimum 0 to +60C - 20 to +75C 2.02" (51.31mm)L 0.83" (21.08mm)W 0 to 95% Description: The DMS-EB-DC/DC Application Board provides isolated +5V power for DATEL's DMS-30PC/LCD Series, 31/2 Digit, LED/LCD Display, Digital Panel Voltmeters. This add-on board is ideal for applications requiring isolation (up to 750V) between the input signal and the meter's +5V supply. Features: The DMS-EB-DC/DC is an excellent choice for dc ammeter applications. These ammeters typically have the current shunt located on the positive side of the power 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 DMS-30. DATEL's new Panel Meter Catalog has a detailed application note on dc ammeters. Applications: The DMS-EB-DC/DC incorporates all standard features of the DMS-EB board; the only exception being the smaller allowable range of power supply voltage when using the LM7805 3-terminal regulator. Use the DMS-EB-DC/DC with any DMS-30PC meter or DMS-30LCD meter (5V-powered models only). +7.5-18V Operation (Optional): Open SG4 and install U2 (LM7805CT) with its metal tab adjacent to U1. Applications requiring a lower dropout voltage should consider the LM2931T-5. Exceeding the C4 12 1 R1 SG14 R2 allowable regulator input voltage SG10 C3 C1 SG11 SG9 SG8 SG7 ranges (see Functional SpecificaSG6 SG5 U1 tions) will cause device overR3 R6 C4 heating! As is the case when U2 specifying any electronic power SG2 SG4 component, be sure to consult all J1 SG12 R5 R4 SG3 SG1 123456 applicable manufacturer's data sheets. Ordering Information DMS-EB-DC/DC DMS-BZL1 DMS-BZL2 RN-DMS DC/DC converter board (with mating connector) Bezel assembly Bezel assembly with sealing gasket Resistor accessory kit For full details go to www.murata-ps.com/rohs www.murata-ps.com Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 SG13 MPM_DMS-EB-DCDC.B01 Page 1 of 2 DMS-EB-DC/DC DC/DC Converter and Isolation Board for DMS-30PC/LCD Meters (-) INPUT LO 12 SG14 (+) INPUT HI ANALOG COMMON 11 10 SG9 R3 10.5k R4 2k R1 R6 4.7k SG7 C4 0.1F 50V SG3 4 DP 3 SG2 +VIN SG13 REF. IN 7 SG12 SG5 R5 50k C2 0.22F 50V 5 LM7805CT SG1 6 DP 1 DP 2 3 5V RETURN/ -BATTERY SG6 +VOUT SG4 U2 SG10 R2 -VIN U1 -VOUT +VIN +VOUT + C3 22F 10V 1 +5V SUPPLY/ +BATTERY TEST/ BACKLIGHT 2 +1.23V REF. OUT 9 SG8 SG11 REF. OUT 8 J1 Components are user-supplied and not part of the standard product Components are part of the resistor accessory kit RN-DMS (see Ordering Information). 1 2 3 4 5 6 Open solder gap HI LO TST TST +V -V (+) (-) IN OUT GND Closed solder gap Figure 1. DMS-EB-DC/DC Schematic Diagram USA: Canada: UK: France: Germany: Japan: China: Singapore: Mansfield (MA), Tel: (508) 339-3000, email: sales@murata-ps.com Toronto, Tel: (866) 740-1232, email: toronto@murata-ps.com Milton Keynes, Tel: +44 (0)1908 615232, email: mk@murata-ps.com Montigny Le Bretonneux, Tel: +33 (0)1 34 60 01 01, email: france@murata-ps.com Munchen, Tel: +49 (0)89-544334-0, email: munich@murata-ps.com Tokyo, Tel: 3-3779-1031, email: sales_tokyo@murata-ps.com Osaka, Tel: 6-6354-2025, email: sales_osaka@murata-ps.com Shanghai, Tel: +86 215 027 3678, email: shanghai@murata-ps.com Guangzhou, Tel: +86 208 221 8066, email: guangzhou@murata-ps.com Parkway Centre, Tel: +65 6348 9096, email: singapore@murata-ps.com Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 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: sales@murata-ps.com ISO 9001 and 14001 REGISTERED 11/26/08 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. (c) 2008 Murata Power Solutions, Inc. www.murata-ps.com MPM_DMS-EB-DCDC.B01 Page 2 of 2 |
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