3 System Installation
27
3.6.8 Connecting communication cable
Choice of communication method
The inverters support PLC communication mode and RS485 communication mode.
Precautions
PLC communication mode and RS485 communication mode can only choose one type, cannot be used at
the same time
Do not connect RS485 communication cable when selecting PLC communication mode
When selecting RS485 communication, do not connect the AC power cable to the PLC concentrator of the
data collector.
Cable connection instructions
The inverter is connected to a communication device (such as a data collection cabinet or a PC) via an
RS485 communication line. On the RS485 adapter board X3, two RS485 interfaces (labeled P2, P3),
as shown below.
Figure 3-13 X3 signal adapter board position and installation instructions
Pass the RS485 cable through the RS485 waterproof lock on the bottom of the inverter (the operation
steps are similar to the AC OUTPUT waterproof lock) and connect to the RS485 interface on the
RS485 adapter board X3. The connection of multiple inverters is recommended to be connected in
series as shown below.
1# Inverter
X3
2# Inverter
3# Inverter
N# Inverter
Data collector
Connect
in this
mode
P3
P2
X3
P3
P2
X3
P3
P2
X3
P3
P2
485 interface
485 interface
Figure 3-14 Schematic diagram of multiple inverter serial signal cable connections
Lock the locking cap when the connection is complete. Check for gaps in the waterproof lock. If there is
a gap in the waterproof lock, use a fireproof mud to block the gap.
