Fronius Rapid Shutdown Box Duo, Installation Instructions Manual

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Connecting the
wires to the Ter-
minals
A1 A2
DC-Output
Duo / Quattro
Quattro
Signal Port
Duo / Quattro
Duo
Connecting the
Rapid Shutdown
Box to a SnapIN-
verter If the AC supply is interrupted, the inverter disconnects the PV DC supply via
the Rapid Shutdown Box. As soon as the AC supply is reinstated, the DC supply
will resume.
The system status of the Rapid Shutdown Box is displayed on the AC breaker
(e.g.: emergency stop).
“OFF” means, that the AC supply is interrupted and the
Rapid Shutdown Box is in a safe state. When the AC breaker is set to “ON” , the
Rapid Shutdown Box is running and the AC supply is upright.
The signal relay in the Fronius inverter opens if the inverter loses the AC connec-
tion. The Rapid Shutdown Box interrupts the DC connection.
However, the signal
relay can no longer be used for other functions (energy manager, alarm, etc.) if
the rapid shutdown initiation is to be triggered by an AC failure on the inverter.
17
EN-US