30
SeaStar ProTap Controller
• It is wise to plan for expansion. With so many new
NMEA 2000
®
products entering the market and the
ability to connect on to the bus for testing it is
sometimes wise to use two harness where one would
suffice. The connection of the two harness can later
be separated so additional tees can be inserted to
add another product or test equipment.
• On 24 volt systems, a DC to DC converter or separate
12 volt battery is required.
Powering the Bus
CAN Bus Power
The CAN Bus requires DC power. The voltage range is 9
to 16 volts. The power may be supplied by one or more of
the products on the Data Bus or from a separate source.
Most equipment manufacturers strongly recommends
that at least two independent sources are used to supply
the data bus power.
The CAN Bus is used to supply power to all the items
that are connected on the bus. For items drawing less
than one amp, not having any other power connection,
or another path back to ground the entire power for the
item may be pulled from the CAN Bus. This requires the
CAN Bus to have adequate sources of power.
Figure 9-5.
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