GW Instek PSU-Series User Manual - Manual (Page 124)

PSU Series User Manual
124
Falling:
For 10kΩ~0kΩ: Output voltage = full scale
voltage × ([10-external resistance]/10)
For 5kΩ~0kΩ: Output voltage = full scale
voltage × ([5-external resistance]/5)
Note
The falling resistance configuration is
recommended for safety reasons. In the event that
the cables become accidentaly disconnected (high
Ω), the voltage output will drop to zero. Under
similar circumstances using the rising resistance
configuaration, an unexpectedly high voltage
would be output.
If swtiches are used to switch between fixed
resistances, use switches that avoid creating open
circuits. Use short-circuit or continous resistance
switches.
Connection
PSU EXT-R
Analog
connector
23
22
Output
Terminal
2 core shielded
wire or twisted
pair
 Pin22 → EXT-R
 Pin23 → EXT-R
 Wire shield → negative (-) output terminal
Steps 1. Connect the external resistance according to the
connection diagrams above.
2. Set the F-90 (CV Control)
configuration settings to 2 for
Ext-R rising or 3 for Ext-R falling.
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