ITECH IT6720/IT6721 Digital Control Power Supply User Manual

About this manual

The ITECH IT6720/IT6721 series is a digitally controlled DC power supply for CNC and industrial use. This manual provides safety notices, installation guidance, and detailed operating instructions.

Key sections include safety precautions, quick‑start setup, programming functions, battery‑charging protection, specifications, dimensions, and troubleshooting tips. This manual is written in Chinese.

What's inside

• Safety Notice
• Safety Precautions
• Quick Start
• Operation Modes
• Programming Functions
• Battery Charging Protection
• Specifications and Dimensions
• Troubleshooting
• Contact Information

Specifications

Frequently asked questions

What input voltage does the IT6720/IT6721 support?

The power supply can operate on either 110 V or 220 V; the correct setting is selected with the rear voltage‑switch.

How do I perform a quick start of the power supply?

Turn on the main power switch, verify the unit is undamaged, confirm the input voltage matches your mains, then press the key to enable output.

How is the battery protected when charging with the power supply?

Connect a series diode and fuse as shown; the diode blocks reverse current and the fuse blows on over‑current to protect the supply and battery.