Advantech BB-USO9ML2-A Serial Adapter - ULI 321DC External USB 2.0 Type B PC 1 x Number of Serial Ports External 1 x Number of USB Ports

Advantech USB converters add one RS-232 port to your PC's USB port with 12 Mbps full speed USB 2.0. Models with 2 kV optical isolation protect from voltage spikes and ground loops. "High retention USB port" option is 50% stronger than regular USB ports gripping standard USB cables in demanding applications. "Locked Serial Number" options use the same serial number with like models so, if a converter is shared by field service laptops, the locked serial number lets you plug-&-play without matching.