SMA SC 500HE-20 Installation - Manual (Page 53)

SMA Solar Technology AG 10 Cable Connection in the Connection Cabinet
Installation Manual SCxxxHE-20-IA-IEN111210 53
Quick-stop function for several Sunny Centrals in one plant
If several Sunny Centrals are in operation in one plant, they must all be switched off when the
quick-stop button is pressed on one inverter (creation of a quick-stop stop string). To achieve this, the
quick-stop buttons of all Sunny Centrals are switched in series.
The necessary 24 V supply voltage for the quick-stop string can be tapped internally by up to two
Sunny Centrals installed in one station. If more than two Sunny Centrals are installed in one station or
the distance between the two Sunny Centrals is greater than 5 m, the voltage supply must be provided
externally.
/05*$&
Damage to the Sunny Central due to missing quick-stop function.
• In plants with more than one inverter, the quick-stop circuits of the installed devices must be
linked with each other and tested for correct functioning.
• The quick-stop string may only be supplied with voltage from one Sunny Central.