Installation Manual
12. In the case of finely stranded wire, provide conductors L1 and L2 and, if applicable, N with a
bootlace ferrule.
13. Depending on the grid configuration, connect the conductors L1, L2 and, if applicable, N to
the connecting terminal plate for the AC connection:
• If there is a neutral conductor, connect the
neutral conductor to the connecting terminal
plate in accordance with the labeling.
Useful hint: To connect conductors made of
finely stranded wire, each terminal must be
opened. For this purpose, insert the
connector into the terminal all the way to
the lock. Open the terminal lock then with a
flat-blade screwdriver (blade: 3.5mm
(0.14in)) and guide the conductor as far
as it can go in to the terminal.
• Connect L1 and L2 to the connecting terminal plate in accordance with the labeling.
Useful hint: To connect conductors made of finely stranded wire, each terminal must be
opened. For this purpose, insert the connector into the terminal all the way to the lock.
Open the terminal lock then with a flat-blade screwdriver (blade: 3.5mm (0.14in)) and
guide the conductor as far as it can go in to the terminal.
• Ensure that all terminals are allocated to the correct conductors.
• Ensure that the conductors are plugged completely into the terminals up to their
insulation.
Useful hint: To release the conductors from the terminals, the terminals must be opened.
To do this, stick a flat-blade screwdriver (blade width: 3.5 mm (0.14in)) as far as it can
go into the rectangular opening above the terminal.
6.4 DC Connection
6.4.1 Requirements for the DC Connection
The inverter has three DC inputs (A, B and C), to each of which a string can be connected in
normal operation. The "4-String-Operation" function allows the DC inputs A and B of the inverter to
operate in parallel and up to four strings to be connected to it in parallel.
6 Electrical Connection
SMA Solar Technology America LLC
Installation manual 31SB5.0-6.0-1SP-US-40-IA-xx-10
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