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Nemic-Lambda ZUP6-33 User Manual
Also see for ZUP10-20: Manual
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Contents
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CAUTIONCAUTIONWhen two power supplies are connected in series, they should be programmed to the same outputvoltage to prevent damage to the lower voltage supply at short circuit condition.When power supplies are connected in series, and the load or one of the output terminalsis grounded, no point may be at a greater potential ( + or - ) from ground than that specifiedon the front panel marking.4.4.14 Series Operation1. GENERAL: Two power supplies of the same rating can be connected in series to increase theoutput voltage or to provide bipolar output voltage.2. Series connection for increased output voltage:2.1 General: At this operation mode, two units are connected so their outputs are summed. Set thecurrent limits of each power supply to the maximum that the load can handle without damage. It isrecommended to connect diodes in parallel to each unit output to prevent reverse voltage during start-up condition or in case one of the units shuts down. Each diode should be rated to at least the powersupply’s output current. Refer to Fig: 4-12 and 4-13 for this operating mode.2.2 Remote programming at series operation for increased output voltage:1. Programming by external voltage; The analog programming circuits of the ZUP power supplyare referenced to the - Sense potential. Therefore, the circuits used to control each unit mustbe separated and floated from each other.2. Programming by external resistor: Programming by external resistor is possible. Refer toFig. 4-5 and Fig. 4-6 for details.3. Programming via the communication port (RS232/RS485): The communication port is isolatedfrom the output voltage, therefore power supplies connected in series, can be chained usingthe Remote-in and Remote-out connectors.Fig. 4-12: Series connection with local sensing. Fig. 4-13: Series connection, remote sensing.- S - S- S - S+LS +LS+LS +LS- LS - LS- LS - LS+S +S+S +SLOAD LOADPOWERSUPPLYPOWERSUPPLYPOWERSUPPLYPOWERSUPPLY+ ++ ++ +_ __ __ _35 |
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