Sea Technology

FEB 2016

The industry's recognized authority for design, engineering and application of equipment and services in the global ocean community

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10 st / February 2016 www.sea-technology.com include SubConn and OptoLink connectors. The NEXUS range includes sev- eral standard models spanning from advanced fber-optic and HD- video capable systems to electric coax cable-compliant multiplexers to bespoke customer-specifed or completely customized telemetry solutions. First NEXUS The very frst NEXUS system was used on the docking module for the 1995 to 1998 EU MAST-III project Geostar (GEophysical and Oceanographic STation for Abyssal Re- search), which aimed to develop an innovative deep-sea benthic observatory for long-term scientifc observations W ith the development of more demanding sensor suites, the requirement for reliable transmission of large amounts of data and video from ROVs, ROTVs, ocean observatories and instrumentation packages in- creases. To meet this need, the MacArtney Group has devel- oped the NEXUS plug-and-play range of telemetry systems that operate as fully transparent fber-optic interfaces be- tween subsea data and video collection units and topside and shore-based control and data presentation. A version with electric interface enables data and video transmis- sion over 6,000 m of coax cable. The NEXUS multiplexer range has been developed in close cooperation with our cus- tomers and forms the backbone of many mul- tiplexing systems installed around the world. Multiplexing A multiplexer, or mux, is a telemetry sys- tem that interfaces multiple real-time electri- cal signals between subsea units and surface control, typically by means of fber optics. The NEXUS range is powered by Moog Focal mul- tiplexer boards. During the last two decades, MacArtney has built up a strong and versatile track record of supplying in-house developed and manu- factured NEXUS multiplexers and complete NEXUS telemetry solutions to OEMs, system providers and operators on a global scale. Providing the link between surface and seabed, NEXUS multiplexers bring together Focal multi- plexer cards and other state-of-the-art telemetric technol- ogies and are widely used for subsea applications such as ROVs, trenchers, towed monitoring systems, ocean observatories and other sensor carrying systems. Beyond interfacing a vast variety of sensors mounted on board a vehicle, CTD or other sensor platforms, NEXUS multiplex- ers work to provide and sustain a safe and effcient fber- optic or electric link between surface and seabed. Stan- dard connectivity interfaces on NEXUS telemetry systems Multiplexers and Telemetry Solutions for Underwater Tech NEXUS Range Ensures High Data Transmission By Jes Højlund • Dr. Ole Aarup Mikkelsen (Top) MacArtney's NEXUS multiplexer range forms the backbone of many multiplexing systems installed around the world. (Bottom) The very frst NEXUS MK I was used on a MODUS vehicle for deployment of an under- water observatory.

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