ITech IT7900P Series User Manual

System-Related Functions
Copyright ©ITECH Electronic Co., Ltd. 122
seven pins are the same.
The IO-1~IO-7 pins provide default functions. Users can realize control
according to the functions defined. Users can also reset the input or output
properties of the present pin and customize the function use of the pin
according to their needs.
When pins 1 to 7 are configured to Output function, when send the
command (IO:STATe 1/0) to instrument, the IO pin can output high level
(False) or low level (True).
When pins 1 to 7 are configured to Input function, an external signal can be
Input to this pin, and the instrument can detect the state of the external
signal.
⚫ Signal Revert
Select Invert or not under the IO Settings menu. If setting to OFF, it means
the default level will be valid. If setting to ON, it means the valid signal is
reversed. For example, the IO-1 pin is inhibit output by default and the high
level is valid, when select revert ON, the low level is valid and the instrument
output is disabled.
Digital IO-1
IO-1 pin can be set to 【Inhibit-latch】,【Inhibit-living】, 【Input】, 【Output】
The default function is inhibit output. When the IO pin is configured for a Inhibit
function and the level signal is low, the output of the machine is forbidden. At
this point, Pin 1 has a bi-directional I/O function, which can both receive the level
signal input from the external instrument and output the level signal
outward.default level is high, and low is valid when entering. Outgoing output
also generates low level signals.
Inhibit function has two mode: Latch and Living.
⚫ Living: When input an inhibit signal and the instrument output is turned OFF.
The status bar of the LCD screen displays INH warning icon and the output
is marked as OFF. If power supply output is ON state before, the ON/OFF
button will be lit. When the input signal undoes, the output returns to normal.
This function can be used to control the output of the power supply.
⚫ Latch: When input an inhibit signal and the instrument output is turned OFF.
The ON/OFF button will be lighted off, the status bar of the LCD screen
displays INH warning icon. In this case, user need to remove the input signal
and press [Shift]+[Esc] to cleare protection, then manually turn on [On/Off]
again.
Digital IO-2
IO-1 pin can be set to 【PS-clear】, 【Input】, 【Output】
The default function is to clear the protected state. When the protection occurs,
the protection state can be cleared through this pin, so that the instrument can
continue to output normally.
IO-2 is bi-directional, that is, when the power supply is in a protected state, the
instrument can receive a pulse signal from an external input through IO-2 for
clean protection operation, or when the power supply is in a protected state, the
clean protection can generate a pulse signal from IO-2.
Digital IO-3
IO-3 pin can be set to 【PS】, 【Input】, 【Output】

ITech IT7900P Series Specifications

General

Brand	ITech
Model	IT7900P Series
Category	Power Supply
Language	English