Furuno CAN bus Network Design Guide
15
1.10.3 Drop Cable Length
The total drop cable length must not exceed
60 m
and no single drop cable should exceed
6
m
.
1.10.4 Device Limitation
No more than 20 (LEN) CAN bus devices can be connected to the Furuno CAN bus network
powered from the DRS and through the MFD unit.
The total LEN of the devices connected to the heavy backbone cable should not exceed 160
and 20 for the light backbone cable.
Table 7 Total LEN vs. Heavy backbone cable length (Power source: 15 Vdc *)
Total
LEN
Max.
(m)
Total
LEN
Max.
(m)
Total
LEN
Max.
(m)
Total
LEN
Max.
(m)
Total
LEN
Max.
(m)
< 20
150 46
80
72
55
98
40
124
30
21 150
47 80
73 55
99 40
125 30
22 150
48 80
74 50
100 40
126 30
23 150
49 80
75 50
101 40
127 30
24 150
50 80
76 50
102 35
128 30
25 150
51 70
77 50
103 35
129 30
26 150
52 70
78 50
104 35
130 30
27 140
53 70
79 50
105 35
131 30
28 140
54 70
80 50
106 35
132 30
29 130
55 70
81 50
107 35
133 30
30 130
56 70
82 45
108 35
134 30
31 130
57 70
83 45
109 35
135 30
32 120
58 65
84 45
110 35
136 30
33 120 59 65 85 45 111 35 137 25
34 110
60 65
86 45
112 35
138 25
35 110
61 65
87 45
113 35
139 25
36 110
62 65
88 45
114 35
140 25
37
100
63
60
89
45
115
35
142
25
38 100
64 60
90 45
116 35
144 25
39 100
65 60
91 40
117 30
146 25
40 100
66 60
92 40
118 30
148 25
41 90
67
60
93
40
119
30
150
25
42 90
68
55
94
40
120
30
152
25
43 90
69
55
95
40
121
30
154
25
44 90
70
55
96
40
122
30
156
25
45 80
71
55
97
40
123
30
160
25
*: When 12 Vdc power source is connected to the network, divide the cable length in halves.
