Installation
and
Operation
Manual
9
4.2 Description for External Interface
Figure 3: Interface of KSG-32K Inverter
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Instructions for Interface
﹡
1: DC Input: DC input terminal, connected to positive and negative
electrode input of photovoltaic array respectively.
﹡
2: Communication Interface RS232: connected with PC via joint
RS232.
﹡
3: Communication Interface RS485: wire RS485A/B is connected
with PC via converter RS485/RS232. (When two or more
inverters are in parallel communication, 2P DIP switch beside
RJ45 of the last one should be “ON”. Or else, it may cause
communication interruption. That 2P DIP switch is on, means
connecting a 120
Ω
communication terminal resistance between
the R/T + and R/T - )
﹡
4: AC OUTPUT: AC output, spaced by three phases AC switch and
connected to L1, L2, L3, N and GND of three-phase grid. (3PH
，
without “N”)
﹡
5: DC switch: can judge the positive and negative electrode input
of photovoltaic array.
﹡
6: Dry contact: interface (optional).
﹡
7: WLAN/GPRS: interface (optional).