More complex to set-up, one-to-one cabling necessary, different types
Very fast (250kbps / 50 x times faster than NMEA 0183) On larger vessels using NMEA 2000 cabling can save as much as 150kg weight and 3 weeks cable running labor, due to the central backbone topology.Ĭonnects only Navigation and Communication DevicesĬonnects NavCom, as well as engine data and Tank Level Sensor Devices This is an older standard, but is still widely used, especially on commercial IMO SOLAS vessels.Īs is immediately obvious from above diagrams, NMEA 0183 uses significantly more cabling to connect all devices. Older Marine Electronic Devices commonly have NMEA 0183 interfaces. Mid-Feed=2 backbone segments totally 100m Maximum Voltage Drop per Backbone recommended for higher backbone lengths and/or high LEN Maximum Number of NMEA 2000 Devices per NetworkĮquivalent Network Load for all devices (LEN) per Backbone Segment In addition, NMEA 2000 networks should be designed adhering to below rules. All the required NMEA 2000 network parts can be supplied by Actisense via Lambda Marine.īackbone maximum cable length (terminator-to-terminator) Additional cable lengths can be used between any of the connectors to extend the length of the network, whilst ensuring that the NMEA 2000 rules for cable lengths are adhered to, see below “Table 1 - NMEA 2000 Cable Length Rules”. T-Pieces are needed to connect each device to the network.
#NMEA 2000 NETWORK CABLE FULL#
Instrument drop: The length of drop cable that connects an NMEA 2000 device to the backboneĪn example of a full NMEA 2000 network is shown below.Īll NMEA 2000 networks require a 12V DC (or 13.8VDC) supply.T-pieces: are connected along the network for NMEA devices to plug in to using a drop cable.Backbone: The main trunk of cable that runs through the boat to form the network, either with one end-fed power point (1 segment) or one mid-fed power insertion point (2 segments).
If you want to find out more about NMEA 2000, please click here.As shown in figure 1 above, NMEA 2000 networks consist of: This image gives you all of the key NMEA 2000 networking rules that, if followed, will ensure your NMEA 2000 network works correctly.ĭigital Yacht uses NMEA2000 Micro connectors on cables and connectors which are universal and compatible with other manufacturer’s NMEA2000 products. Please note that all Digital Yacht “Drop Cables” can also be used as Backbone cables and are easily connected together to make any length of backbone cable required. The maximum single drop cable length is 6m and the total length of all drop cables must be less than 76m. This is a 3ft (1m) NMEA 2000 drop cable made of metal connectors for maximum reliability.ĭigital Yacht can supply NMEA 2000 cables and connectors, to expand your NMEA 2000, to whatever size you need – up to the maximum 50 NMEA 2000 device limit.