System-Related Functions
Pin Name Type Description
22 CV Digital
output
Indicate the instrument’s working
state: Under the CV mode, this pin out-
puts 5V; otherwise, this pin outputs
0V.
23 On/Off Digital
output
Indicate the instrument’s On/Off state:
When the instrument is On, this pin
outputs 5V; when the instrument is Off,
this pin outputs 0V.
Enable/disable analog control
1. Press [Shift]+[P-Set](System) composite key, and enter the System menu
interface.
2. Rotate the knob, select I/O Config, and press [Enter] key for confirmation.
The related configuration menus can be displayed only when the user se-
lects the analog interface.
3. Rotate the knob, select Ext_Program, and press [Enter] key for
confirmation.
4. Rotate the knob, and switch the display of On and Off options. After select-
ing On , press [Enter] key for confirmation.
• Off: Default value, indicating that this function is turned off.
• On: Indicating that the function is turned on. Before turning on the exter-
nal analog interface function, please confirm whether pins 1 (Vol_Pro),
15 (Cur_Pro) and 17 (Cur/Vol_Pro) are correctly connected.
5. Press [Esc] key, and exit the menu interface.
Analog interface remote control
Through the analog input interface, the analog signal can be input to remotely
set the or inputvoltage value or current value. For detailed function definition of
pin, refer to Table 7–2 DB25 analog interface description. The text below intro-
duces the wiring and usage method taking the common On/Off control and volt-
age and current control as examples.
When the voltage and current setting values are controlled through the analog
interface, connect the external voltage (0V ~ 10V) to program the voltage or cur-
rent value between 0 and full range. Meanwhile, the analog monitoring function
(0V ~ 10V) can be used to monitor the existing voltage or current between 0
and full range. During parallel operation, the master unit analog interface can be
used to program or monitor the voltage and current for programming of 0V ~
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