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NATIONAL
INSTRUMENTS
Fig.6-2: J1-Remote Resistor Programming Connection
*Max. output current is limited by front panel current setting.
6.5 Remote Resistor Programming of Output Voltage and Output Current
For resistive programming, internal current sources, for output voltage and/or output current
control, supply 1mA current through external programming resistors connected between J1-6
and J1-12 and between J1-5 and J1-1, J1-7 & J1-11. The voltage across the programming resistors
is used as a programming voltage for the power supply. Resistance of 0~5Kohm or 0~10Kohm
can be selected to program the output voltage and current limit from zero to full scale. A variable
resistor can control the output over the entire range, or a combination of variable resistors and
series/parallel resistors can control the output over restricted portion of the range.
Remote Programming settings as follows:
1. For Resistor Analog Programming wiring refer to Fig.6-2.
2. Short pins J1-1 to J1-7.
3. Press MENU button. MENU (GREEN) LED illuminates. ”
Set ” message appears on Voltage display.
4. Press Voltage encoder. ” Ot ” message appears on Voltage Display and ” CvRR ” appears on
the Current display.
5. Press on the Voltage encoder to select programming the Output Voltage, or Press Current
encoder to select programming of the Output Current.
6. The selected function appears on the Voltage display. Parameter ” F.N ” or ” E.O ” or ” E.res ”
appears on the Current display.
7. Rotate and press the Current encoder on to select ” E.res ”.
8. ” Ot ” message appears on Voltage Display and ” CvRR ” appears on the Current display.
9. Rotate Current encoder until ” rNG ” appears on the display. Press on the relevant Encoder.
10. ” rANG ” appears on Voltage display and ” 5 ” (5K) or ” 10 ” (10K) appears on Current display.
11. Rotate and press the Current encoder to select the desired programming Resistance range.
12. Press MENU button twice to return display to the previous state. MENU LED turns OFF.
Output Voltage
Programming
Output Current*
Programming
Optional sets
Lower limit
Optional sets
Upper limit
Programming
Resistor
Optional sets
Lower limit
Optional sets
Upper limit
Programming
Resistor