SMA RSB-2S-US-10 Manuel D'installation page 33

SMA Solar Technology America LLC
Connecting the Input Strings
Requirements:
☐ The two PV strings of each separate input are connected in parallel inside the Rapid Shutdown
Box. For the parallel connection of the input strings, a correct dimensioning of the strings must
be used.
☐ The maximum permitted system voltages of the Rapid Shutdown System may not be exceeded
(see Section 11 "Technical Data", page 40).
☐ Each positive DC conductor of a string must be equipped with a male MC4 connector (refer to
the connector manual for information on equipping).
☐ Each negative DC conductor of a string must be equipped with a female MC4 connector
(refer to the connector manual for information on equipping).
Procedure:
1.
Danger to life due to high voltages
When exposed to sunlight, the PV array generates dangerous DC voltage which is present
in the DC conductors. Touching the DC conductors can lead to lethal electric shocks.
• Ensure that no voltage is present on the input strings.
• Ensure that the Rapid Shutdown Box is closed.
2. Connect the input strings to the MC4 connectors
that lead from the Rapid Shutdown Box. When
doing so, ensure that the the conductors are not
connected to the incorrect polarity. The negative DC
conductors to be connected must be equipped with
female MC4 connectors and the positive DC
conductors with male MC4 connectors.
☑ The connectors snap audibly into place.
3.
Damage to the MC4 connectors due to moisture ingress.
The MC4 connectors are only sealed if all MC4 connectors leading from the Rapid
Shutdown Box that are not required are sealed using the supplied sealing plugs.
• Plug the supplied sealing plugs into the MC4 connectors that are not required.
Installation Manual
DANGER
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NOTICE
6 Electrical Connection
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RSS-US-IA-xx-14 33