How Long Can a USB Cable Be?

In today's world, USB has become a widely chosen communication protocol for data transfer between computers and their peripheral devices. Initially, USB was primarily used to connect devices over short distances; however, over time, the use of USB has expanded to encompass long distance applications such as medical imaging, security cameras, and machine vision. For example, when setting up multiple USB security cameras around the house and monitoring them with a single PC, the need for longer USB transmission distances is often beyond the scope of the USB-IF standard.

According to the USB-IF, each USB standard has a clearly defined maximum length, as the signal power decreases as the length of the USB cable increases. Therefore, shorter USB connections are usually more recommended.

USB Standard Length

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