SMA SC 400HE Installation - Manual (Page 51)

SMA Solar Technology AG External Connections
Installation Guide SCxxxHE-IEN104432 51
Connection Sequence for DC Connection
NOTICE!
Operational reduction of the Sunny Central due to faulty connection!
When connecting the power cables, the following connection sequence must be observed:
1. Screw
2. Spring washer
3. Washer
4. Connection point for copper bar
5. Copper-clad aluminum washer
• when using aluminum cables
6. Aluminum terminal lug
7. Washer
8. Spring washer
9. Nut