ELECTRICAL INSTALLATION
5
59
8011325/18IM/2020-07-02|SICK
Subject to change without notice
O P E R A T I N G I N S T R U C T I O N S | ICR880/890
5.3.4
“CAN 1-IN”/“CAN 1-OUT” data interface
General requirements of the CAN interface
The SICK-specific CAN-SENSOR network is based on the CAN bus. It is set up in line
topology.
The following table shows the maximum permitted length of the CAN bus depending on
the data transmission rate selected.
Data transmission rate
Maximum data cable length
10 kbit/s
4,976 m
20 kbit/s
2,476 m
50 kbit/s
976 m
100 kbit/s
576 m
125 kbit/s
476 m
250 kbit/s
1)
226 m
500 kbit/s
76 m
1) Default in the ICR880/890 system
Tab. 19: CAN bus: maximum lengths of cable depending on the data transmission rate
The following table shows the maximum permitted total length of all stub cables
depending on the data transmission rate. This total length must not be exceeded. Each
individual stub cable must be a maximum of 6 m long.
Data transmission rate
Maximum total of all stub cables
125 kbit/s
156 m
250 kbit/s
78 m
500 kbit/s
39 m
Tab. 20: CAN bus: maximum lengths of stub cables depending on the data transmission rate
The required wire cross-section for the data cable depends on the total length of the
network. The following table shows the overview as per ISO 11898.
Length of cable
Required wire cross-section (data cable)
0 m ... 40 m
≥
0.25 mm
2
40 m ... 300 m
≥
0.34 mm
2
300 m ... 600 m
≥
0.5 mm
2
600 m ... 1,000 m
≥
0.75 mm
2
Tab. 21: CAN bus: required wire cross-section depending on the data cable length
