Eaton XV400 10.4" Operating Instructions Manual page 37

CAN bus topology
The maximum baud rate depends on the cable length:

Cable length
25 m
50 m
100 m
250 m
500 m
500 m
1000 m
2500 m
5000 m
Tab. 18 Relationship of cable length / baud rate

The use of repeaters is recommended with cables over 1000 m in length. Repeaters

can also be used to implement electrical isolation. Refer to the documentation of the
repeater manufacturer for further information.
Observe the recommendations of the CiA (CAN in Automation).

When preparing the cables, ensure that there is a low-resistance connection between

the cable shield and the connector casing (→ Chapter 5.3.2,  30).
A bus segment can connect up to 32 bus stations.

Several bus segments can be linked via repeaters (bidirectional amplifiers). Refer to the documen-

tation of the repeater manufacturer for further information.
A bus segment must be provided with cable termination (120 Ω) at both ends. These terminations

must be connected in the connector, directly between pin 2 and 7.

The bus segment must be terminated at both ends.

No more than two terminations must be provided on each bus segment.

Transmission faults can occur if operation is carried out without the correct termina-

tion.
Fig. 20 Bus segment with four bus stations
MICRO PANEL XV400 10.4"/12.1"/15" 12/2010 MN04802010Z-EN www.eaton.com
5.3 Cable preparation
Max. baud rate
1000 Kbit/s
800 Kbit/s
500 Kbit/s
250 Kbit/s
125 Kbit/s
100 Kbit/s (adjustable via software)
50 Kbit/s
20 Kbit/s
10 Kbit/s
5 Installation
37