Operation Manual

10
System Planning
A single CAN network congured to a baud rate of 250k is recommended to make system conguration straight-
forward while allowing for interfacing of NMEA2000 compatible sensors for certain functions. A dual or triple
CAN network conguration is recommended where the system has network cable lengths of over 75 metres, or
there is a requirement for redundant systems.
For example a dual CAN network could allow:
a) Forward and Aft CAN networks, eectively doubling the possible network length
b) Key systems operating on separate networks, for example one GPS unit on each network
Cable lengths
Maximum cable lengths vary depending on the installation. For example a long cable with one interface on the
end will be very dierent to a similar length cable with 16 interfaces , all powering sensors. As such the following
data is a guide only:
Guideline max. cable length per CAN channel
Baud Rate Max Length
125k 150m
250k 75m
500k 35m
1M 5m
Maximum cable length is measured from the two end devices on the network (a+b+c), or the distance between
terminating resistors – whichever is greater.