SMA DB-DC-DISCON - Manual (Page 2)

SMA Solar Technology AG
DC_Disc-IUS082311 2 / 4 Additional Information for Installation
DC Ground Wiring With SMA DC-Disconnect
Pay attention to all operation and safety instructions listed in the Installation Guide of the Sunny Boy.
This instruction does NOT replace the Sunny Boy Installation Guide.
DC Wiring With SMA DC-Disconnect
Pay attention to all operation and safety instructions listed in the Installation Guide of the Sunny Boy.
This instruction does NOT replace the Sunny Boy Installation Guide.
A Connect the grounding electrode
conductor with the grounding electrode.
B Connect the PV generator grounding to
the grounding electrode.
Negative Grounding
Connect the positive DC wires to the terminal la-
beled PV UNGROUNDED in the SMA DC-Dis-
connect.
Connect the negative DC wires to the terminal la-
beled PV GROUNDED in the SMA DC-Discon-
nect.
Positive Grounding
Connect the negative DC wires to the terminal la-
beled PV UNGROUNDED in the SMA DC-Dis-
connect.
Connect the positive DC wires to the terminal la-
beled PV GROUNDED in the SMA DC-Discon-
nect.