Electrical Design Guide
‑44‑
Table 3–12 Pin connection relation of the cable used for multi‑drive RS485 communication
(pins in 485 group used only)
RJ45 on the Drive Side (A) RJ45 on the Drive Side (B)
Communica
tion Type
Pin No.
Description
Communica
tion Type
Pin No.
Description
RS485
4 485+
RS485
4 485+
5 485‑ 5 485‑
8 GND 8 GND
‑
Enclosure
PE (shield
layer)
‑
Enclosure
PE (shield
layer)
In case of a large number of nodes, use the daisy chain mode for RS485
communication. Connect the reference grounds of RS485 signals of all the nodes (up
to 128 nodes) together.
Figure 3‑25 RS485 bus topology
Do not connect (GND) terminal to the CGND terminal of the drive. Failure to comply
may damage the machine.
Figure 3‑26 Daisy chain mode
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