SMA SUNNY ISLAND 3.0M - Connecting RS485 to the Sunny Webbox

SMA Solar Technology AG 5 Single-Cluster System
Installation - Quick Reference Guide Off-Grid-IS-en-30 29
5.4 Connecting RS485 to the Sunny WebBox
Figure12: Connecting the RS485 communication bus to the Sunny WebBox
C DC+ cable Battery terminal
For a single-phase system, the cable length and the conductor cross-section
must be identical on each Sunny Island.
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: terminal ComSync In
F Sunny Island: terminal ComSync Out
On slave 2 either connect the data cable of the Sunny Island Charger charge
controller or insert the terminator into the terminal.
Position Designation Description/information
AJumper J1A Terminator
If the Sunny WebBox is installed at the end of the communication bus,
a jumper must be inserted.
If the Sunny WebBox is installed between two nodes, the jumper must be
removed.
BJumper J1B and J1C Signal bias voltage
Make sure that both jumpers are inserted.
C SMACOM Terminal RS485
2: Signal Data+ (A), color coding of the insulated conductor:
green with white stripes
5: Signal GND, color coding of the insulated conductor:
orange with white stripes
7: Signal Data − (B), color coding of the insulated conductor:
white with green stripes
Position Designation Description/information