SMA SB 3300 Installation - Manual (Page 21)

SMA Solar Technology AG Electrical Connection
Installation Guide SB33_38-IEN111851 21
5.2.2 Interior View
The following figure shows the various components and connection areas of the open inverter.
Object Description
A Slot for communication
B Display
C Jumper slot for fan test
D Operating status LEDs
E Tab for grounding the cable shield with line-conducted communication
F AC socket for grid connection
G DC connectors for connecting the PV strings
H Electronic Solar Switch (ESS) socket
I Enclosure opening with filler-plugs for communication
K Varistors
L Communication Connection
M Jumper slot for communication