Figure 5-4 MBUS networking (SDongle)
(A) PV string (B) SUN2000 (C) AC combiner box
(D) Transformer station (E) Power grid (F) SDongle
(G) Management system
● To ensure the system response speed, it is recommended that less than 30 solar
inverters be connected to each COM port on the SmartLogger and that less
than 10 solar inverters be cascaded over the SDongle.
● The RS485 communication distance between the last solar inverter and the
SmartLogger cannot exceed 1000 m.
SUN2000-(100KTL, 110KTL, 125KTL) Series
User Manual 5 Electrical Connections
Issue 07 (2020-09-15) Copyright © Huawei Technologies Co., Ltd. 42
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