Lowrance HDS-7 Gen2 Touch Installation Manual - Page 24

NMEA 2000 device connection All HDS Gen2 Touch models are equiped with a NMEA 2000 port, which allows the receiving and sharing of a multitude of data from various sources. Essential network information • A NMEA 2000 network consists of a linear "backbone" from which "drop cables" connect to NMEA 2000 devices • NMEA 2000 is a powered network. • NMEA 2000 cables used for Lowrance products are of the 'micro-c' style, which is a cable/connector specification approved for use in NMEA 2000 certified networks. • A single drop cable has a maximum length of 6 m (20 ft). The total length of all drop cables combined should not exceed 78m (256 ft) • The backbone has a maximum cable length of 100m (328ft). The maximum cable length between any two devices on the network is also 100 m (328 ft) - this is taking in to account device drop cable length. • A NMEA 2000 network needs to have a terminator at each end of the backbone. Planning and installing a network backbone The NMEA 2000 backbone needs to run between the locations of all products you want to install, typically in a bow to stern layout. Route the backbone so that drop cables to devices do not exceed 6m length. Choose from the following components to make up your NMEA 2000 backbone: • Micro-C cables: 2' (0.61m), 6' (1.82m), 15' (4.55m), 25' (7.58m) • T-connector. Use at locations where you want to connect a device by drop cable • Micro-C male and Micro-C female to SimNet adaptor cables for connecting to SimNet bus, or adding devices fitted with a SimNet connector to a Micro-C network. ¼¼ Note: If using a wind sensor, plan to connect this to one end of the backbone with the termination resistor at the mast head. Power the network A NMEA 2000 network requires its own 12 V DC power supply. The Lowrance NMEA 2000 power cable is pre fitted with an inline fuse holder and 3 amp fuse. 22 | Wiring | HDS Gen2 Touch Installation Manual