SMA SB 3300-11 Installation - Manual (Page 22)

Electrical Connection SMA Solar Technology AG
22 SB33-38-11-IA-en-62 Installation Manual
5.2.2 Interior View
The following figure shows the various components and connection areas of the open inverter.
*If you have ordered the inverter without ESS, the inverter is fitted with 2 negative and 2 positive DC connectors.
** optional
Object Description
A Slot for communication
B Display
C Jumper slot for fan test
D Operating status LEDs
E Flat male tab for grounding the cable shield with cable-bound communication
F AC socket for grid connection
G DC connectors for connecting the PV strings*
H Jack for the Electronic Solar Switch (ESS)**
I Enclosure opening with filler-plug for communication.
K Varistors
L Communication connection
M Jumper slot for communication