Isolated USB Hubs
Isolated USB Hubs protects your computer’s USB port from dangerous ground loops and provides for data integrity in electrically noisy environments; such as near a variable frequency motor drive, welding, or other large loads. However, this added protection and reliability do not come without a price. Before deciding to use USB isolation, you need to consider your bandwidth, downstream power, and cascade requirements. The USB 2.0 standard calls out three speeds. The first two speeds are actually carryovers from the earlier USB 1.1 standard – Low Speed and Full Speed. When USB 2.0 came out, High Speed was introduced. USB 2.0 is also backwards compatible with the lower USB 1.1 speeds. As you can see, the naming convention can cause a bit of confusion because “Full Speed” is lower than “High Speed.” Be careful when spec’ing out your equipment. Adding isolation limits bandwidth to “Full Speed” or 12 Mbps. While this is still technically USB 2.0, the host controller will not pass data at “High Speed” or 480 Mbps. It will automatically ratchet down to 12 Mbps. Therefore, if you require 480 Mbps “High Speed,” you should not use isolation. Luckily, most industrial applications will work fine at 12 Mbps. Our USB Hubs come in both isolated and non-isolated versions. Whether you want an industrial grade product or an OEM embedded USB hub module, our selection include cost-effective options that provide durability, flexibility, and high performance.