Figure 5-19 Communication mode for a single SUN2000
● Figure 5-20 shows the communication mode for multiple SUN2000s.
If multiple SUN2000s are used, connect all the SUN2000s in daisy chain mode
over an RS485 communications cable.
Figure 5-20 Communication mode for multiple SUN2000s
● The RS485 communication distance between the SUN2000 at the end of the daisy chain
and the SmartLogger cannot exceed 1000 meters.
● If multiple SUN2000s need to communicate with one another and are connected to a
PC over the SmartLogger1000, a maximum of three daisy chains can be
congured.
● If multiple SUN2000s need to communicate with one another and are connected to a
PC over the SmartLogger2000, a maximum of six daisy chains can be congured.
● To ensure the system response speed, it is recommended that the number of devices on
each daisy chain be less than 30.
MBUS Communication
The MBUS communication board loads communication signals onto power cables
for transmission.
The built-in MBUS module in the SUN2000 does not need to be connected with additional
cables.
Selecting a Communication Mode
● The SUN2000 with no user interface board supports only MBUS
communication.
SUN2000-(70KTL, 75KTL)-C1
User Manual 5 Electrical Connections
Issue 09 (2020-10-12) Copyright © Huawei Technologies Co., Ltd. 52
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