The Wema NMEA2000 voltage isolator is essential for the correct installation of the NMEA2000 network by separating different power sources. The voltage isolator ensures that the power from, for example, the engine and the regular power supply are kept separate. Without a voltage isolator, there is a risk that the starter batteries will be discharged via the NMEA2000 network, or the NMEA2000 network may be switched off when the engine is switched off. The Wema NMEA2000 voltage isolator is installed between the T-connectors to isolate one side of the backbone from the other.