SMA SC 200 Installation - Manual (Page 44)

Internal Electrical Connections SMA Solar Technology AG
44 SC20_25_35-IEN094521 Installation Guide
5.6 Connecting the Internal Control Lines
The internal control lines X8 and X9 are located in the transfer cable duct of the inverter cabinet. They
connect the AC cabinet to the controller board. The controller board is located on the power unit.
The following diagram shows the plug-in contact on the controller board of the Sunny Central 250 as
an example.
1. Connect control lines X8 and X9 to the controller board.
☑ The control lines are connected.
A Plug-in contact for internal control lines X8 and X9
Position of the connection terminals of the control lines
The exact position of the plug-in contact differs depending on the model. The exact position
of the connection terminals can be determined with the help of the equipment identifier and
the circuit diagram enclosed.