SMA SI 3.0-11 Quick Reference Guide V.3.0 - Manual (Page 27)

SMA Solar Technology AG 4 Battery Backup Systems With All-Pole Disconnection
Installation - Quick Reference Guide Ersatzstrom-IS-en-30 27
G Control cable of the tie
switch
Sunny Island: connection Relay1 terminals C and NC
Automatic transfer switch: connection X4 terminals 1 and 2
If the multifunction relay activates, the contactors of the tie switch
deactivate.
Conductor cross-section: 1.5 mm² to 2.5 mm²
H Control cable of contactor
Q4
Sunny Island: connection Relay2 terminals C and NO
Automatic transfer switch: connection X5 terminals 1 and 2
If the multifunction relay activates, contactor Q4 activates.
Conductor cross-section: 1.5 mm² to 2.5 mm²
I Measuring cable for
monitoring the tie switch
Sunny Island: connections DigIn+ and BatVtgOut+
Automatic transfer switch: connection X5 terminals 3 and 4
Inside the Sunny Island inverter, connect connections DigIn − and
BatVtgOut − .
Conductor cross-section: 0.2 mm² to 2.5 mm²
K Data cable to
Sunny Remote Control
Sunny Island: Display connection
L Speedwire network cable Sunny Island: ComETH connection
In order to connect the router/network switch, the Speedwire data module
Sunny Island must be mounted in the Sunny Island (see Sunny Island
Speedwire data module installation manual). The ComETH connection is
on the data module.
M Data cable for battery
management
Sunny Island: ComSync In connection
You only have to connect a data cable to the battery if lithium-ion batteries
are used. The communication bus must be equipped with a terminator on
both ends.
N Data cable for the internal
communication in the cluster
Sunny Island: ComSync Out connection
Connection of internal communication bus of slave 1
Position Designation Description/information