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4.8
Installing the RS485 Communications Cable
•
The solar inverter supports RS485
communication and MBUS communication. If
the MBUS communication mode is used, you
do not need to connect the communications
cable to the RS485-1 port.
•
This section describes how to connect three
communications cables.
•
When routing communications cables,
separate communications cables from power
cables to prevent communication from being
affected.
Port
Pin
Definition
RS485A IN, RS485
1
differential signal+
RS485-1
RS485B IN, RS485
3
differential signal–
Protection
5
PE, shielding ground
ground
RS485A, RS485
RS485-2
7
differential signal+
Connecting RS485 Communications Cables (4–8 mm Four-hole Rubber Plug)
Pin Definitions of Communications Ports
Pin
Definition
RS485A OUT, RS485
2
differential signal+
RS485B OUT, RS485
4
differential signal–
6
PE, shielding ground
RS485B, RS485
8
differential signal–
Number of
communications cables
16
Description
Used for cascading
solar inverters or
connecting to devices
such as the
SmartLogger.
N/A
Used for connecting to
RS485 slave devices.
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