Black Box Ethernet Data Isolator - 10BASE-T/100BASE-TX Protect equipment from being harmed by damaging ground loops caused by a difference in the ground potential of two connected devices. Compact devices that maintain Ethernet/Fast Ethernet communications across an electrical isolation barrier. Compact and self-contained. Install in-line and draw power from the network and connected equipment. RoHS compliant and meet European Medical Device Directive (EN6060-1).