FTP Series Programmable DC Power Supply Operation Manual
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3.10 External Control
FTP series power supply analog interface PIN 18 can control the power supply ON/OFF status. This function has
three selections:
●
Off, turn off external control;
●
Toggle, similar to front panel
key, to switch the power supply ON/OFF state;
●
Hold, turn on output when input signal is valid, turn off when invalid.
How to configure the external control:
1. Press
, select “External” sub menu under “Set” menu, press “Enter” to enter into external setting
interface;
2. Rotate the rotary knob to select the “Inhibit”, press “Enter” to switch to edit state;
3. Rotate the rotary knob to select the external control behavior;
4. Press “Enter” to validate the selected parameter.
There are two different ways for external control connection,
option 1: connect the analog interface PIN 18 and PIN 20:
Figure 3-16 External Control Connection 1
This is quite simple, close the switch, control signal valid; open the switch, control signal become invalid.
Option 2: Use 0~5V level signal.
Figure 3-17 External Control Connection 2
This way requires external voltage source, the control signal is valid when input voltage 0V; invalid if 5V.
