High Performance Network Isolator EMOSAFE EN-1005+ network isolators interrupt any electrically conductive connection (wire and shield) between devices connected to each other via copper-guided Ethernet cabling are connected. They prevent potential equalization currents and protect connected devices and their users from transient overvoltages caused by installation errors, flashes, switching operations, Electrostatic discharges etc. have been directly or inductively coupled into the network line.