Remote Operation
Remote Analog Programming of Output Voltage and Current Limit
74
Operating Manual for XFR 1.2kW Series Power Supply
Remote Analog Programming of Output Voltage and Current Limit
Remote analog programming allows control of the power supply’s output voltage
and/or current limit to shift from local operation at the front panel voltage and current
controls to external analog sources. As you vary the external programming source,
the power supply’s output varies proportionally over its output range.
Using remote analog programming requires that you reset switch SW1 and make
connections to the J2 connector on the power supply’s rear panel. See “Rear Panel
Connectors and Switch” on page 18.
Remote
Programming
Options
See Table 4.1 for a summary of the options available to you for programming output
voltage and current limit using an analog source.
Table 4.1
Remote Programming Options
Remote
Analog
Programming
Procedure
1. Turn the power supply OFF.
2. Set switches SW1-1, SW1-2, SW1-3, and SW1-4 according to the programming
sources that you are using, as indicated in Table 4.2. See Notes at the end of this
procedure for more information about switch settings.
3. Install any required J2 connector jumpers as indicated in
Table 4.2.
4. Connect the programming source(s) to the mating J2 connector as shown in
Figure 4.1 and observe the correct polarity for voltage sources. Ensure that the
mating connector is plugged securely into the rear panel connector.
Control of...
Programming Scales
1
1. These scales may be used in any combination.
Output Voltage and/or
0-5 V and 0-10 V voltage sources
Current Limit
0-5 k and 0-10 k resistances
!
CAUTION
To maintain the isolation of the power supply output and prevent ground loops,
use an isolated (ungrounded) programming source when operating the power
supply via remote analog control at the J2 connector.
!
CAUTION
The remote programming inputs are internally referenced to the supply’s
negative output. Do not connect control ground (J2 terminals 3, 5, or 7) to the
supply's positive output.
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