Furuno M12-05BM+05BF-010 Design Manual page 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 Max.
LEN (m)
< 20 150
21 150
22 150
23 150
24 150
25 150
26 150
27 140
28 140
29 130
30 130
31 130
32 120
33 120
34 110
35 110
36 110
37 100
38 100
39 100
40 100
41 90
42 90
43 90
44 90
45 80
*: When 12 Vdc power source is connected to the network, divide the cable length in halves.
Total Max. Total
LEN (m) LEN
46 80 72
47 80 73
48 80 74
49 80 75
50 80 76
51 70 77
52 70 78
53 70 79
54 70 80
55 70 81
56 70 82
57 70 83
58 65 84
59 65 85
60 65 86
61 65 87
62 65 88
63 60 89
64 60 90
65 60 91
66 60 92
67 60 93
68 55 94
69 55 95
70 55 96
71 55 97
Furuno CAN bus Network Design Guide
Max. Total Max.
(m) LEN (m)
55 98 40
55 99 40
50 100 40
50 101 40
50 102 35
50 103 35
50 104 35
50 105 35
50 106 35
50 107 35
45 108 35
45 109 35
45 110 35
45 111 35
45 112 35
45 113 35
45 114 35
45 115 35
45 116 35
40 117 30
40 118 30
40 119 30
40 120 30
40 121 30
40 122 30
40 123 30
15
Total Max.
LEN (m)
124 30
125 30
126 30
127 30
128 30
129 30
130 30
131 30
132 30
133 30
134 30
135 30
136 30
137 25
138 25
139 25
140 25
142 25
144 25
146 25
148 25
150 25
152 25
154 25
156 25
160 25