System Limitations; Maximum Distance Between The Rapid Shutdown Box And The Solar Modules - Fronius Rapid Shutdown Box Single Instructions De Service

The Rapid Shutdown can be initialized by means of AC failure if the signal lines are con-
nected to the inverter. Alternatively or additionally, an emergency stop button that inter-
rupts the signal wires can be used.
Input 1.1-
Input 1.2-
Input 1.1+
Input 1.2+
System Limita- Maximum number of Rapid Shutdown Boxes in a system: 5
Maximum line resistance permitted in the signal loop: 300 
tions
Maximum Dis-
tance Between
the Rapid Shut-
down Box and the
Solar Modules
Input 2.1+
RSB Multi
Input 2.2+
Input 2.1-
Input 2.2-
DC-Output 1 DC-Output 2
Conduit size:
3/4 in.
Conduit size:
1 in.
The Rapid Shutdown Box - Single can
connect one string. The Rapid Shutdown
Box - Multi offers the possibility to connect
up to four input strings. These become two
output strings combined.
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