Electrical Connection
SMA Solar Technology AG
40
SSMUS-TUS094511
Technical Description
7.2.2 Sunny Central: Connecting ground
The grounding cable of the Sunny Central is connected to
the terminals (A) in the Sunny Central String-Monitor.
1. Strip the cable by approx. 1.1 in. (28 mm).
2. Loosen the nut with a wrench counterclockwise.
3. Put the nut and the washer aside.
4. Pull the screw terminal from the threaded bolt.
5. Open the screw terminal with a hexagon (allen) key counterclockwise.
6. Insert the cable into the Sunny Central String-Monitor as described in chapter 5 "Attaching the
7. Plug the copper inner conductor of the cable into the screw terminal.
8. Tighten the screw terminal using a hexagon (allen) key clockwise. The required torque is
325 in-lb.
9. Put the screw terminal on the threaded bolt.
10. Put the washer and the nut on the threaded bolt.
11. Tighten the nut using a wrench clockwise. The required torque is 222 in-lb.
12. Connect the second grounding cable of the Sunny Central as described above.
☑ The ground cable of the Sunny Central is connected.
Wire size
Torque
350 kcmil
325 in-lb
A
A
1.1 in.
