TDK-Lambda Genesys User Manual

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Contents

TDK-Lambda Genesys User Manual Manual pdf 81 page image

7583532002 Rev C7.5. Resistive Programming of Output Voltage and Current LimitFor Remote Resistive programming, internal current sources, for Output voltage and/orOutput current control, supply 1mA of current through external programming resistorsconnected between J1-9, -22 and J1-10, -23. The voltage across the programming resistorsis used as a programming voltage for the Power Supply. Resistance of 0 to 5kOhm or 0 to10kOhm can be selected to program the Output voltage and Output current limit from zero tofull-scale.A variable resistor can control the Output over its entire range, or a combination of variableresistor and series/parallel resistors can control the Output over a restricted portion of itsrange.Perform the following procedure to set the Power Supply to Remote Resistive programming:a) Turn the AC On/Off power switch to the OFF position.b) Set SW1-1 to the UP position for Output voltage external programming and SW1-2 to theUP position for Output current external programming.c) Set SW1-3 to select the programming resistor range according to Table 7-4.d) Set SW1-7 and SW1-8 to the UP position to enable the Resistive programming mode.e) Connect a wire jumper between J1-8 and J1-12 (refer to Table 4-4).f) Connect the programming resistors to the mating plug of J1 as shown in Fig.7-2.g) Set the programming resistors to the desired resistance and turn on the AC On/Off powerswitch. Then adjust the programming resistances to change the power supply outputlevel(s).NOTES:1. SW1-4, -5, -6 and -9 are not required for remote programming. Their settings canbe determined according to the application requirements.2. The control circuits allow the user to set the Output voltage and Output current limitup to 5% over the model-rated maximum value. The Power Supply will operatewithin the extended range, however it is not recommended to operate the PowerSupply outside of its voltage and current rating and performance is not guaranteed.3. To maintain the temperature stability specification of the Power Supply, theresistors used for programming should be stable and low noise resistors, with atemperature coefficient of less than 50ppm.4. When Remote Resistive programming is used, front panel and computer control(via the serial communication port) of Output voltage and Output current aredisabled.SW1-3 setting Output Voltage programmingVPGM (J1-9)Current limit programmingIPGM (J1-10)UP 0-10kOhms 0-10kOhmsDOWN 0-5kOhms 0-5kOhmsTable 7-4: SW1-3 Setting and Programming Range (Remote Resistive PGM)