3
Operating the Power Supply Locally
50
Series N8700 User’s Guide
Voltage Programming of Output Voltage and Current
CAUTION
To maintain the isolation of the power supply and prevent ground loops, use an
isolated programming source when operating the unit using analog programming.
Voltage programming sources of 0 - 5V or 0 - 10V can be used to
program the output voltage and current limit from zero to full scale.
Set the power supply to analog voltage programming as follows:
1
Make sure that the power supply is turned off.
2
Set SW1 setup switch 1 (for voltage) and 2 (for current) to the Up
position.
3
Set SW1 setup switch 3 to select programming voltage range
according to the table following these procedure steps.
4
Make sure that SW1 setup switches 7 and 8 are set Down.
5
Connect a short between J1 pin 8 and J1 pin 12 (see following
figure).
6
Connect the programming source to the mating plug of J1 as
shown in the following figure. Observe the correct polarity for the
voltage source.
7
Set the programming sources to the desired levels and turn the
power supply on. Adjust the programming sources to change the
power supply output.
The analog control circuits let you set the output voltage and current
limit up to 5% over the model-rated maximum value. The power
supply will operate within the extended range, however it is not
recommended to operate the power supply over its voltage and
current rating, and performance in this region is not guaranteed.
SW1 switch 3
Voltage Programming
(J1 pin 9)
Current Programming
(J1 pin 10)
Down (default)
0 – 5V
0 – 5V
Up
0 – 10V
0 – 10V
