NEXUS fiber multi-channel system (multiplexer), developed and produced by MacAtney, is mainly used for large capacity, long distance and high speed data transmission of large ROV or deep tow devices.

Up to 10 underwater sensors and equipment of various types, such as underwater cameras, sonar, lights, CTD, sound tachometer, altimeter, attitude sensor, electronic compass, etc., can provide different power supplies through a NEXUS underwater unit and convert electrical signals into light transmission; It underwater unit, is both a electro-optical conversion system, is also a power distribution system, after calibration in advance, underwater sensors and equipment after the end of the cable (including power supply and signal), can be directly connected to the connector, underwater unit 1 ~ 10 different sensor signal into all the way or two way single-mode and multimode optical fiber transmission, by deck power supply at the same time, through the umbilical cord line and underwater unit four core power interface for built-in unit underwater power distribution module power supply, power distribution module can provide different output voltage of the power supply for use in all sensors.