Connecting The Data Cable Of The Battery And Communication Cable Of The Automatic Transfer Switch - SMA SUNNY BOY STORAGE 3.7 Operating Manual

SMA Solar Technology AG
6.5 Connecting the Data Cable of the Battery and
Communication Cable of the Automatic Transfer
Switch
Connect the communication cable of each battery and, in battery-backup systems, the
communication cable of the automatic transfer switch as described in the following.
Communication between Inverter and Battery
• Communication between the inverter and the battery takes place via the battery
communication cable via CAN bus.
Additionally required material (not included in the scope of delivery):
☐ One battery communication cable for the communication between inverter and battery
☐ In battery-backup systems with automatic transfer switch: one communication cable between
inverter and automatic transfer switch
Requirements for data cable of battery:
☐ Twisted pair conductors
☐ Cable category: minimum CAT5e
☐ Shielding: yes
☐ Conductor cross-section: 0.25 mm² to 0.34 mm²
☐ Recommended number of conductor pairs: 4
☐ External diameter: 6 mm to 8.5 mm
☐ Maximum cable length between battery and inverter and, in battery-backup systems, between
automatic transfer switch and inverter: 10 m
☐ The cable has to be insulated for 600 V.
☐ UV-resistant for outdoor use.
☐ Comply with the requirements of the battery manufacturer.
Assignment of the terminal block:
Terminal block
A B C
D E F
Operating manual
Position
A
B
C
D
E
F
6 Electrical Connection
Assignment
Not assigned
Enable
GND
CAN L
CAN H
+12V supply for automatic
transfer switching device
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