Huawei SUN2000-29.9KTL - Connecting RS485 Communications Cables

SUN2000-(29.9KTL, 33KTL-A, 36KTL, 42KTL)
User Manual
5 Connecting Cables
Issue 11 (2019-06-08)
Copyright © Huawei Technologies Co., Ltd.
58
Selecting a Communication Mode
The RS485 and MBUS (PLC) communication modes are mutually exclusive.

If the MBUS (PLC) communication mode is selected, do not connect the RS485
communications cable. In addition, you need to set MBUS communication to Enable
on the SUN2000 APP.
The MBUS (PLC) communication mode is only applicable to medium-voltage grid
connection scenarios and non-low-voltage public grid connection scenarios (industrial
environment).

If the RS485 communication mode is selected, you are recommended to set MBUS
communication to Disable on the SUN2000 APP.
MBUS communication is set to Enable by default.
5.5.2 Connecting RS485 Communications Cables
Note
An RS485 communications cable can be connected in two ways:

Terminal block connection
You are recommended to use a DJYP2VP2-22 2x2x1 network cable or a
communications cable with a conductor cross-sectional area of 1 mm
2
and cable outer
diameter of 14–18 mm.

RJ45 network port connection
You are recommended to use a shielded RJ45 connector and a CAT 5E outdoor shielded
network cable with an outer diameter less than 9 mm and internal resistance not greater
than 1.5 ohms/10 m.
Select either connection mode during installation. Connecting to a terminal block is recommended.
When laying out communications cables, separate them from power cables and keep them
away from strong signal sources to avoid communication interference.
Terminal Block Functions
Figure 5-26 shows an RS485 terminal block.