SMA SMB - Manual (Page 23)

SMA Solar Technology AG 6 Electrical Connection
Installation Manual SMB-IA-en-10 23
Sunny Main Box Cabinet with 2 x 2 x 3 inputs
Figure 11: Connection area of the Sunny Main Box Cabinet with 2 x 2 x 3 inputs
6.2 Connecting the String Cables to the Fuse Holders
1. Lead the string cables through the cable glands into the enclosure interior. Make sure polarity
is correct.
2. Tighten the cable glands.
3. Cut the string cables to length and strip the insulation.
4. Attach the string cables to the internal cable support rail.
5. Connect the string cables to the bolt clamps of the fuse holders (torque: 35 Nm). Make sure
polarity is correct.
Position Designation
A DC output
B DC input
C Earth cable connection
D Cable support rail