Garmin G3X - Page 46

190-01115-01 G3X™/G3X Touch™ Avionics Installation Manual
Rev. AV Page 2-22
Multiple LRUs may be connected in a daisy-chain manner along the backbone of the CAN bus
(Figure 2-5).
Figure 2-5 Daisy-chained LRUs on Backbone
Daisy-chained LRUs (LRUs not at the extreme ends of the CAN bus) connect to the CAN backbone
through short “stub” or “node” connections (Figure 2-6). The length of each node connection should be
kept as short as possible, and should not exceed 0.3 meters (1 foot). The best way to connect devices
between the ends of the CAN bus while maintaining short stub node lengths is to splice the connections as
close to the device as practical (Section 22.2.9
). Unshielded wire sections should be kept as short as
practical.
Multiple devices must not connect to the CAN bus backbone at the same point. Rather than splicing two or
more stub node connections together, the CAN bus should instead be daisy chained from one device to the
next (Figure 2-6).
Figure 2-6 Node Connections
LRU
LRU
DAISY-CHAINED LRUs
LRU LRU
LRU
TERMINATED BACKBONE LRUs
TERM
TERM
LRU
LRU
LRU LRU
LRU
Max. node length
0.3 meter (1 ft)
TERM
TERM