Then I saw this promising looking Isolator USB to USB Optocoupler Isolation Module Coupled Protection Board ADUM3160 Isolation Voltage 2500V board for around 10 Euros.ġ2 Mbps support USB 1.5 Mbps at low speed and full speed does not support pure high-speed equipment I have thought of getting USB isolator for some time, but many of them seem to be quite expensive (many cost nearly 100 Euros). The USB isolators effect a potential decoupling of all USB connections and separate the ‘normal’ PC system from the critical application. It will also protect the USB device and host from electrical shocks or static electricity shocks. USB isolation works by creating a new ground for the USB device so that it doesn’t have to share ground with your computer (and other devices that you might have connected in your house).

USB isolators are the professional tools to avoid and fight ground loops and equalizing currents and to protect against overvoltage. USB isolators are used in applications where direct USB connection can create noise (ground loop noise to audio or measurement), direct connection can be unreliable (noise to USB signal) or where isolation is needed to protect USB port or for electrical safety (for example laboratory measurement). The USB isolator is a device that will pass USB signal from input to output connector, while providing galvanic isolation between them.