29
Installation Instructions and Owner's Manual
CAN Bus
Connectivity
Electrical Harness
The Network must consists of a single harness run to
which devices are connected by means of a tee
connector. All products must connect onto the node
part of the tee connector. Each end of the harness
must have a terminator. It is essential there be a total
of two, and ONLY two, terminators - one located at each
end of the backbone.
The cabling that is used conforms to the DeviceNet
standard and was developed for Industrial applications.
In general the harness are molded and the connection
area is sealed with o-ring gaskets to provide a good
seal from the environment. The harness are available
in a variety of lengths.
The electrical harness must not be cut or spliced.
Replace worn or frayed harness.
When securing the harness and especially when tying
down a number of direct connected tees never pull
them down so tight as to cause strain or put a curve in
the tees as this may cause a failure.
When installing a NMEA 2000
®
CAN Bus system there
are several things to keep in mind:
• The harness ends are male and female. To avoid a
mismatch it is best to work from one end toward the
other. If you must work from both ends toward the
middle assure that the mating point will be a male/
female connection.
Note: a tee connector with nothing attached to its node
is OK and will not effect the network. NEVER use a
terminator to cap the node of an unused tee connector.
Figure 9-4.
NOTICE
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