B&K Precision 9171-9174 - Manual - Manual (Page 89)

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5. Press to turn the output ON (enabled), and output
voltage and current will change as your external DC voltage
sources or resistances change.
Note: When external analog control is enabled, all front panel keys are
locked except for and ( or for dual
channel models). Output voltage and current is locked to be
controlled with the connected external voltage sources or
resistances only. To return to normal control and display mode,
follow the steps above to disable external analog control.
3.13 Digital I/O
Digital I/O functions are supported with the DIO/Analog card
installed.
The instrument uses a DB-9 9-pin interface for digital I/O operations.
A total of 9 pins are available, 8 of which can be configured as
INPUT or OUTPUT and 1 for ground (GND) via remote commands
(Refer to Table 5). The maximum voltage for input is
5 V, and
maximum voltage for output from the supply is also 5 V.
CH1
OFF
0.00 V 0.00 A
CH2
OFF
0.00 V 0.00 A
Menu OUTPUT CH1 CH2
OUTPUT