SMA SUNNY CENTRAL 900CP XT - Connecting the Data Cable from the Sunny String-Monitor

12 Cable Connection of External Devices and Connections in the Interface Cabinet SMA Solar Technology AG
56 SCCPXT-IA-D7-en-42 Installation Manual
• Remove the connection plug from the base terminal.
• Insert the screwdriver into the square opening of the
connection plug. This will release the opening of the
connection plug for the insulated conductors.
• Insert the insulated conductors of the cable into the connection
plug, as shown in the circuit diagram.
• Remove the screwdriver from the connection plug.
• Plug the connection plug into the base terminal.
12.3.2 Connecting the Data Cable from the Sunny String-Monitor
The data cable for the RS485 communication and the +55 V
DC
voltage supply links the Sunny String-Monitor to the
Sunny Central.
For an optimum voltage supply, SMA Solar Technology AG recommends connecting two insulated conductors each with
a cross-section of 0.5 mm
2
to one voltage supply terminal. You can connect two insulated conductors to one terminal for
the GND_EXT signal in just the same way.
Recommended cable type: Li2YCYv (TP) 4 x 2 x 0.5 mm
2
.
Cable requirement:
☐ The voltage supply and the communication connection must be combined in one cable.
☐ The cable must be shielded.