SMA SI 3.0-11 Quick Reference Guide V.4.0 - Manual (Page 19)

SMA Solar Technology AG 5 System With Three Sunny Island Inverters
Installation Manual - Quick Reference Guide FSS-IS-en-40 19
Position Designation Description/information
A AC power cable Terminal AC2 Gen/Grid terminals L, N
TT
, and PE
Utility grid connection with a three-wire cable
Connect slave 1 to line conductor L2, connect slave 2 to line conductor L3.
Conductor cross-section: 6 mm² to 16 mm²
B Grounding conductor Connection AC1 Loads/SunnyBoys terminal PE
Additional grounding if the conductor cross-section of the AC power cable
is less than 10 mm².
The conductor cross-section must equal at least the conductor cross-section
of the AC power cable.
C DC+ cable Battery connection
Conductor cross-section: 50 mm² to 95 mm²
Cable diameter: 14 mm to 25 mm
D DC − cable
E Data cable for the internal
communication in the cluster
Terminal ComSync In
With slave 1: connection of internal communication bus of master
With slave 2: connection of internal communication bus of slave 1
F Data cable for the internal
communication in the cluster
Terminal ComSync Out
With slave 1: connection of internal communication bus after slave 2
With slave 2: Leave terminator plugged in. Slave 2 is connected to slave 1
only.