Fronius Rapid Shutdown Box-Duo, Installation Instructions Manual

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18
Optional: Connecting the Grounding to a Ground Lug - Variant 1
2 3
Optional: Connecting the Grounding to a Ground Lug - Variant 2
4 5
Connecting the
Rapid Shutdown
Box to an Emer-
gency Stop But-
ton Connection to an External Emergency Stop Button:
If an external emergency stop is needed, it can be installed anywhere in the Signal line us-
ing standard electrical installation procedures. When pressing the Emergency Stop button
rapid shutdown is initiated and the pv-array is disconnected in the rapid shutdown box. As
soon as the Emergency Stop button returns to its original position, the pv-array is recon-
nected.
Requirements for the external emergency stop button:
- Maximum switching load 30 V DC / 5 mA
- Rated voltage between contacts and housing: 600 V DC
Connecting the
Rapid Shutdown
Box to a Fronius
Primo 10.0 / 11.4 /
12.5 / 15.0
If multiple strings are connected to an MPP tracker, the string voltages should be as equal
as possible in order to avoid power losses.
1 2
1 2
IMPORTANT! Wiring schemes show best practice examples assuming that more than two
PV strings connected in parallel require overcurrent protection (e.g. fusing). Refer to Primo
installation manual regarding multi conductor wiring and fusing details