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Analog Programming (APG) and Isolated Analog Programming (ISOL)
4-2 975-0200-01-01
Introduction
The rear panel connectors J1 and J3 provide an option to control and
monitor the output of the power supply with analog signals. Connector J1
provides a non-isolated analog interface where all signals are referenced
to the negative output terminal of the power supply. Connector J3 is an
isolated interface and also provides an isolated auxiliary voltage output to
aid analog programming.
Analog Programming (APG) of Output Voltage and Output Current
Analog programming allows control of the power supply’s output
voltage, output current or both to be controlled from analog input sources.
As the programming source is varied within the configured analog
programming range (2–10
volts/kΩ max), the power supply’s output
varies proportionally over its output range. For example, if you set the
programming scale to 10
V voltage source and apply 5 V to the
programming pins, the power supply will be programmed to 50% of the
output capability for your power supply.
While analog programming mode is configured, you will not be able to
make adjustments to the set points from the front panel or through the
remote interfaces.
The front panel will display AnPr in the output current display when the
mode control knob is turned to VOL or CUR positions for the
parameter(s) that are configured to be controlled by analog programming.
If an adjustment of a parameter controlled by APG is attempted using a
SCPI command, a “-221 Settings Conflict” error will be pushed onto the
error queue.
Using analog programming requires that you make connections to the
Isolated Analog Programming Connector or Analog Programming
Connector on the rear panel of the power supply. Depending on your
model, see
“Rear Panel Connectors on XTR 850 Watt” on page 1–6 or
“Rear Panel Connectors on XTR 1700 Watt” on page 1–8.