Inspection and Installation
2.5 Remote Interface Connection
This series power supply comes standard with four communication interfaces:
USB, LAN and CAN, and supports two optional communication interfaces:
GPIB, RS-232. You can choose one of them to communicate with your
computer.
When you use the remote interface to send SCPI instructions, if you use the
programming commands that involve modifying the instrument settings, such
as modifying the output voltage value, after completing the communication
connection between the instrument and the host computer, and after the
communication settings are completed, you must execute the SYST:REM
command firstly.
2.5.1 USB Interface
The USB interface is located on the rear panel of the instrument. You can con-
nect the instrument to the computer via a cable with a USB interface on both
ends (USB A-type connector on one end and USB B-type connector on the
other).
The user needs to select the USB interface type in the System menu before us-
ing the USB interface. The following types are optional.
• TMC: USB_TMC interface;
• VCP: Virtual serial port. For Win7 system, you can download IT-M3900 VCP
driver from ITECH official website or contact technical support engineer; for
Win10 system, you do not need to install VCP driver.
The operation steps to change the USB interface type in System Menu are as
follows.
1. Press the composite keys [Shift]+[P-set] (System) on the front panel to en-
ter the system menu.
2. Rotate the knob to select I/O and press [Enter].
3. Rotate the knob or press the Left/Right key to select USB, and press
[Enter].
4. Rotate the knob or press the Left/Right key to select the communication
method.
If you select VCP, you also need to set the baud rate and other parame-
ters of the virtual serial port, and the baud rate must be the same as the
configuration on the computer side.
Copyright © Itech Electronic Co., Ltd.
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