SMA SUNNY BOY STORAGE 3.7-10, Service Manual For Installers

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4 CAN bus functional test SMA Solar Technology AG
Service Manual for Installers SBSx.x-10-CAN-SG-en-10 8
4 CAN bus functional test
4.1 Assembling the test cable
SMA recommends creating a test cable from new components, as described below.
For one-time use, the plugs already present at the inverter and the existing communication cable can be used.
Required materials
☐ One battery communication cable for the communication between inverter and battery
The CAN communication cable has to fulfill the requirements described in the operating manual of the inverter.
☐ Two 6-pole terminal blocks
Assignment of the terminal block
Terminal block Position Assignment
A B C
D E F
A Not assigned
B Not assigned
C GND
D CAN L
E CAN H
F Not assigned
Procedure:
• On both terminal blocks, wire position CAN L (green), Can H
(white) and GND (orange). CAN L and CAN H have to consist
of a wire pair (see the inverter manual).
4.2 Performing the functional test
Prior to performing any work on the inverter, always disconnect the inverter from voltage sources as
described in the inverter manual. Always adhere to the prescribed sequence.
Procedure:
1. Disconnect and isolate the inverter from the AC and DC power (see inverter manual).
2. Remove the black cover of the inverter.
3. Remove all terminal blocks from inputs BAT1, BAT2, BAT3 and BAT4 .