ITech IT7900 Series User Manual

System-Related Functions
Copyright ©ITECH Electronic Co., Ltd. 54
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 pin and customize the function according to their needs.
When pins 1 to 7 are configured to Output function, either high level (False)
or low level (True) can be Output.
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.
z Signal Revert
Select invert 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 low
level singal is valid, when select revert ON, the high level signal is valid and
the instrument output is disabled.
Digital IO-1
IO-1 pin can be set to ǏInhibit-latchǐǏInhibit-livingǐ ǏInputǐ ǏOutputǐ
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DQGLiving.
z Latch: When input a low level signal, the instrument output is turned OFF,
and the ON/OFF button is invalid. When the output is ON state, the output
will be turned OFF (the status bar of the LCD screen displays INH warning
icon and the output is marked as OFF), but the ON/OFF button will be lit.
When the level return to High level, the output returns to normal.
z Living: When input a low level signal, the instrument output is turn OFF, and
the ON/OFF button will be lighted off, the status bar of the LCD screen
displays INH warning icon. When the protection state is cleared, manually
turn on [On/Off] again.
Digital IO-2
IO-1 pin can be set to ǏPS-claerǐ ǏInputǐ ǏOutputǐ
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 VOTIGTHKYKZZU ǏPSǐ ǏInputǐ ǏOutputǐ
The default function is protection state indicator. IO-3 pin will output high or low
level based on whether the instrument is under protection or not. Under normal

ITech IT7900 Series Specifications

General

Brand	ITech
Model	IT7900 Series
Category	Power Supply
Language	English

Summary

Chapter1 Overview

1.1 Brief Introduction

Introduces the IT7900 series power supply, its capabilities, and applications.

1.2 Models and Options

Details the available IT7900 series models, their power, voltage, current, and phase specifications.

1.3 Optional accessories

Lists and describes optional accessories like GPIB, RS-232/Analog, and fiber optic cables for expansion.

1.4 Instrument Size Introduction

Provides dimensions and installation space considerations for the IT7900 series power supply.

Chapter2 Instrument Introduction

2.1 Verifying the Shipment

Instructions for checking package contents and reporting any discrepancies or damage.

2.2 Front Panel

Identifies and describes the components and controls located on the front panel of the IT7900.

2.3 Keyboard

Explains the functions of each key on the IT7900 power supply's keyboard interface.

2.4 Push-on Knob

Details the functionality of the push-on knob for value setting and menu selection.

2.5 Rear Panel

Identifies and describes the connectors and ports on the rear panel of the IT7900 series.

Chapter3 Installation

3.1 Connectiong the Power Cord

Provides safety precautions and steps for connecting the power cord to the instrument.

3.2 Connecting Test Lines (Optional)

Guides on selecting and connecting optional test lines for instrument testing.

Chapter4 Getting Started

4.1 Power-on the Instrument

Explains the procedures and safety precautions for powering on the instrument.

4.2 Home-Screen Overview

Describes the IT7900's touch screen interface and display for single and three-phase modes.

4.3 Touch Screen Introduction

Introduces the touch screen interface, drag-and-drop functions, and menu navigation.

4.4 Set output parameters

Details how to program voltage and frequency values using keys or the knob.

4.5 Output On/Off Control

Explains how to use the [On/Off] key to control the power supply's output status.

Chapter5 Operation and Application

5.1 Full 4-Quadrant Output Character

Describes the 4-Quadrant grid simulator and power amplifier capabilities of the IT7900.

5.2 Select the Power Supply Mode

Guides on selecting between single-phase, three-phase, reverse phase, and multi-channel modes.

5.3 Select the Output Mode

Explains the AC, DC, AC+DC, and DC+AC output modes available for the IT7900.

5.4 CV Mode/CC Mode and CP Mode

Details the Constant Voltage (CV), Constant Current (CC), and Constant Power (CP) modes.

5.5 Professional Anti-islanding Test Mode

Describes the anti-islanding test mode for inverter and grid-tied DUT testing.

5.6 Waveform Selection

Covers how to select standard and user-defined waveforms for output.

5.7 Full 4-Quadrant Power Amplifier

Explains the power amplifier function for hardware-in-the-loop applications.

5.8 Auto-range Function

Describes the auto-ranging capability for voltage and current at fixed power.

5.9 Programmable Output Impedance

Details how to simulate AC grid impedance using programmable output impedance.

5.10 Sweep Function

Explains how to use the Sweep function to test efficiency and capture parameters.

Chapter6 System-Related Functions

6.1 System Menu Reference

Provides a reference to the system menu options for configuration and settings.

6.2 Key Lock Function

Explains how to enable and disable the keyboard lock feature.

6.3 Switching Local/Remote Mode

Details how to switch between local and remote control modes.

6.4 Save and Recall Operations

Guides on saving and recalling instrument parameters using nonvolatile memory.

6.5 Protection Function

Covers overcurrent, voltage limit, and over-temperature protection settings.

6.6 Screen Capture Function

Describes how to capture and save the instrument's screen to a USB disk.

6.7 Trigger Function

Explains the different trigger sources available for controlling operations.

6.8 Set Parallel Operation Mode

Details how to connect multiple units in parallel for increased power output.

6.9 Remote Measurement Function

Explains how to use remote sensing for maximizing measurement accuracy.

6.10 Digital I/O Function

Covers the digital input/output functions for logic control and status indication.

6.11 Analogue Function (Ext-Program) (Optional)

Describes the optional analog interface for external control and monitoring.

Chapter7 Measurement Functions

7.1 Meter Mode

Explains the basic metering functions and parameters displayed on the interface.

7.2 Oscilloscope Mode

Details how to display and analyze voltage and current waveforms using the oscilloscope function.

7.3 Harmonic Measurement

Covers the harmonic analysis capabilities, including list and bar chart displays.

Chapter8 Configuration Arbitrary Waveform

8.1 List Function

Guides on creating and managing list files for AC wave sequences with varying amplitudes.

8.2 Setting of Surge/Sag Configuration

Explains how to simulate surge and sag for voltage fluctuation testing.

8.3 Self-defined Waveform Function

Describes how to create and edit custom waveforms for use in list operations.

Chapter9 Technical Specifications

9.1 Main Technical Parameters

Lists the detailed technical specifications, including input/output parameters and ranges.

9.2 Supplemental Characteristics

Provides information on calibration frequency and cooling style.

Chapter10 Remote Control

10.1 USB Interface

Explains how to connect and use the USB interface for PC communication and control.

10.2 LAN Interface

Details the configuration and use of the LAN interface for network connectivity.

10.3 CAN Interface

Covers the configuration and troubleshooting of the CAN communication interface.

10.4 GPIB Interface (Optional)

Describes the optional GPIB interface for instrument control and communication.

10.5 RS-232 Interface (Optional)

Explains the optional RS-232 interface for serial communication.

10.6 Commonly Used Commands Overview

Lists common SCPI commands for remote operation and control.

10.7 Demo Software Introduction

Introduces computer control software for remote operation and testing.

Appendix

Specifications of Red and Black Test Lines

Lists specifications and current ratings for optional test lines.