Can Bus Driving Capability - ICP DAS USA I-7532RM-FD Service And Usage Information

2.7. CAN Bus Driving Capability

Before introducing the driving capability of the I-7532RM-FD, some characteristics
of copper cable must be assumed. The recommended AC parameters are 120Ω
impedance and 5ns/m line delay, and the DC parameters are shown in the table below.
Table 2-7-1 Recommended DC parameter for CAN Bus Line
Wire Cross-Section [mm
Under the condition described above, users can refer to the following table to know
the maximum node number in each segment following ISO 11898-2 and the maximum
segment length when using different type of wire.
Wire Cross-Section
2
[mm ]
~0.25 (AWG23)
~0.5 (AWG20)
~0.8 (AWG18)
~1.3 (AWG16)
I-7532RM-FD ( 2-port CAN/CAN FD Bridge )
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~0.25 (AWG23)
~0.5 (AWG20)
~0.8 (AWG18)
~1.3 (AWG16)
Table 2-7-2 Driving Capability
The maximum segment length [m] under the case of
specific node number in this segment
16 Nodes
< 220
< 390
< 590
< 980
2
] Resistance [Ω/km]
32 Nodes
< 200
< 360
< 550
< 900
User Manual (version 1.0.0)
< 90
< 50
< 33
< 20
64 Nodes 100 Nodes
< 170
< 310
< 470
< 780
< 150
< 270
< 410
< 670
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