Mid-fed, with 2 x 3VDC, one for each backbone segment.
Sample diagrams are included hereafter.Įnd-fed, self-contained backbone with terminators and 4-way T-Piece.Įnd-fed or mid-fed but with only 1 x 3VDC power for both backbone segments. All, except the A2K-SBN, can be customized and expanded. To design your NMEA 2000 Network, Actisense offers 4 types of solutions based upon 4 different types of backbone Power-Insertion Components.
NMEA 2000 Gateways – To put analogue engine data on the NMEA 2000 network or to connect a PC.NMEA 2000 Drop Components – To create NMEA 2000 device drops.NMEA 2000 Backbone Components – To create a NMEA 2000 network backbone.Lower Total Cost Of Ownership due to less cabling to be purchased and installedĪctisense offers a complete NMEA 2000 Network Solution, consisting of: Higher Total Cost Of Ownership due to longer more expensive cable runs, cable running labor, network configuration labour Plug & Play technology, one bus Cable, standardized connectors Of connectors depending on Device Manufacturer 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. 2 x NMEA 2000 Devices (such as the Actisense EMU-1 and/or any other NMEA 2000 certified device from various manufacturers such as Radars, Chartplotters, GPS etc.).2 x T-Pieces (one per connected device).2 x Terminating Resistors (to terminate the network on both ends of the backbone).1 x Power-T (to insert network power, should be fused).In addition, a correctly functioning network will require at the minimum the following components:
Micro bulk cable is primarily used as drop cable, but it can also be used at the trunk line depending on network power requirements. Please note: Open boxes are not returnable.