SMA SC 400HE Installation - Manual (Page 83)

SMA Solar Technology AG External Connections
Installation Guide SCxxxHE-IEN104432 83
NOTICE!
Damage to the Sunny Central or the PV generator due to faulty DC cabling.
• It is obligatory to follow the circuit diagram provided when connecting the additional
Sunny Main Boxes.
Mounting material for the connection
The mounting material is installed to the bar in the factory. A M12 ring terminal lug is used
for the connection of the Sunny Main Boxes to the bar and must be provided for by the
customer.
Connection of aluminum terminal lug
If aluminum terminal lugs are used for connection to the copper bar, refer to notes in
chapter 6.1 ”Connecting High-Current Contacts” (page 50).
NOTICE!
Due to spatial considerations, connect the ring terminal lug to the front of the
busbar.
Configuration of the components for connection
(from back to front):
1. Screw
2. Spring washer
3. Washer
4. Conductor rail
5. Terminal lug
6. Washer
7. Spring washer
8. Nut