Electrical Installation
‑181‑
RS485 communication for connections of multiple AC drives in parallel
The following table specifies the cable pin for connections of multiple AC drives in
parallel in RS485 communication networking.
Table 8–22 Cable pin for parallel communication of multiple AC drives
AC Drive (Side A) AC Drive (Side B)
Communica
tion Type
Signal Name
Function Communica
tion Type
Signal Name
Function
RS485 RS485+
RS485 signal
(positive)
RS485 RS485+ RS485
signal
(positive)
RS485‑
RS485 signal
(negative)
RS485‑ RS485
signal
(negative)
CGND
Signal
reference
ground
CGND
Signal
reference
ground
‑
GND (CGND)
Enclosure
‑
GND (CGND)
Enclosure
Networking
Use the daisy chain connection for the RS485 bus in the case of a large number of
nodes, as shown in the following figure. Connect the RS485 signal reference ground of
all nodes (up to 128 nodes) together.
Figure 8‑64 Daisy chain connection
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