connected to up to three listener (receiver) devices, dependent on the hardware capabilities
of the receiver.
NMEA 2000 connector details
Cable plug (female)
Pin Purpose
1 Shield
2 NET-S (+12 V DC)
3 NET-C (DC negative)
4 NET-H
5 NET-L
Plan and install an NMEA 2000 network
The NMEA 2000 data port allows the receiving and sharing of a multitude of data from
various sources.
An NMEA 2000 network consists of a powered backbone from which drop cables connect to
NMEA 2000 devices. The backbone needs to run within 6m (20ft) of the locations of all
products to be connected, typically in a bow to stern layout.
The following guidelines apply:
• The total length of the backbone should not exceed 100 meters (328 ft)
• A single drop cable has a maximum length of 6 meters (20 ft). The total length of all drop
cables combined should not exceed 78 meters (256 ft)
• The backbone needs to have a terminator at each end of the backbone. The terminator
can be a terminator plug or a unit with built-in terminator