ITech IT6942A - Page 36

Function and Features
Copyright ©ITECH Electronic Co., Ltd. 27
Before using analog function, you need to turn on this function in the menu. You
need to set the Ext-C item in the System menu, and select ANA to enable the
external analog control function; select DIGIT to enable the external digital
control function.
The external analog interface terminals: REF_10V , Vs/D0, Is/D1 , D2,
ON/OFF , Vm , Im , NULL , GND correspond to the reference voltage, voltage
control/digital D0, current control/digital D1, digital D2, output on and off control,
voltage monitoring, current monitoring, null pin, and ground.
 External analog control interface usage.
You can use three channels of 0~10V analog signal to control voltage, current
and output on/off respectively; and two channels of 0~10V analog signal to
monitor the voltage and current output of power supply.
Detailed terminal descriptions are listed in the table below.
No.
Name
Description
Pin1
REF_10V
The power supply itself outputs a 10V reference voltage, which
can be connected to a resistor for voltage dividing and used for
analog control.
Pin2 Vs (voltage
setting)/D0
Voltage control as well as digital input D0 bit.
The voltage control terminal, with an analog input range of
0~10V, can be used to adjust the voltage between 0~voltage
full scale. Taking the IT6942B as an example, when the voltage
input to this terminal is 5V, the corresponding output voltage of
the IT6942B should be 30V.
Pin3
Is (current
setting)/D1
Current control terminal and digital input D1 bit.
The current
control terminal, with an analog input range of
0~10V, can be used to adjust the current between 0~current full
scale, take IT6942B as an example, when the input voltage of
this terminal is 1V, the corresponding output current of IT6942B
should be 1.5A.
Pin4
D
2
Digital input D2 bit, input 0V (means digital quantity 0) or 10V
(means digital quantity 1).
D2D1D0 combination can input digital quantity 0~7, digital
quantity 0 is invalid input, input digital quantity 1~7 means recall
the parameter in the storage area of Group1~7.
Pin5
ON/OFF
Output on/off control, input analog is 0V or 10V, when input 0V,
power output state is OFF, when input 10V, power output state
is ON.
Pin6
Vm
Monitor the output voltage.