SMA SC 250U - Manual (Page 35)

SMA America, LLC 6 Electrical connection
Installation Guide DISU_SCUS-IA-IUS111711 35
Connection sequence from PV-plant:
For good access to all DC home run terminals always contact from the back row to the front row and
always from the bottom to the top contact within each row.
The connection sequence in terms of home run numbers is shown in figure 15 and listed below.
Figure 15: DC home run numbers from PV-plant
Row Home run number
1 4 and 2
2 9, 3 and 1
3 8 and 6
4 7 and 5