4 connecting the slaves – SMA SI 3.0-11 Quick Reference Guide V.3.0 User Manual
Page 38
5 Battery Backup Systems Without All-Pole Disconnection
SMA Solar Technology AG
38
Ersatzstrom-IS-en-30
Installation - Quick Reference Guide
5.2.4 Connecting the Slaves
Figure 16: Connecting the slaves
Position
Designation
Description/information
A
AC power cable
Sunny Island: connection AC2 Gen/Grid terminals L, N
TT
,
and PE
Automatic transfer switch:
Connect slave 1 to X3 terminals L2, N, and PE.
Connect slave 2 to X3, terminals L3, N, and PE.
Conductor cross-section: 10 mm² to 16 mm²
B
Measuring cable for voltage
measurement
Sunny Island: connection ExtVtg terminals L and N
Automatic transfer switch:
Connect slave 1 to X4 terminals L2 and N.
Connect slave 2 to X4 terminals L3 and N.
Conductor cross-section: 1.5 mm² to 2.5 mm²
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
Sunny Island: ComSync In connection
F
Data cable for the internal
communication in the cluster
Sunny Island: ComSync Out connection
With slave 2, leave terminator plugged in.
Slave 2 is connected to slave 1 only.