Electrical Installation
‑158‑
Figure 7‑59 CAN bus topology
The transmission distance of CAN bus is directly dependent on the baud rate and
communication cable. The mapping between the maximum transmission distance of
CAN bus and the baud rate is described in the following table.
Table 7–27 Transmission distance and rate
Transmission Distance (m)
Rate (kbps)
Number of Nodes Cable Diameter
25 1024 64 0.205 mm
2
95 500 64 0.34 mm
2
560 100 64 0.5 mm
2
1100 50 64 0.75 mm
2
7.6.3 EtherCAT Wiring
Use standard RJ45 network ports and standard registered jacks for the EtherCAT bus.
Use Cat 5e shielded twisted pair cables and injection molding wires with iron shells.
As verified by FastEthernet technology, when the EtherCAT bus is used, the cable
between equipment shall not exceed 100 m. Failure to comply may result in signal
attenuation, affecting normal communication.
Figure 7‑60 Requirements on fabrication of EtherCAT network cables
Use shielded cables for network data transmission for the EtherCAT bus. Network
cables of the specifications specified in the following table are recommended.
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