SMA SSM16-11 - Manual (Page 31)

SMA Solar Technology AG 6 Electrical Connection
Installation Guide SSM16-24-IA-IEN105120 31
6.2 Connecting the PV Strings
6.2.1 Calculating the Maximum Number of Strings per Measuring
Input
You can connect several PV strings in parallel in the Sunny String-Monitor. The maximum number of
PV strings connected in parallel depends on the adjustable tolerance and can be determined as
follows:
N = maximum number of PV strings that can be connected in parallel.
You can adjust the "Tolerance" parameter through the Sunny Central Control, Sunny Data Control or
Sunny WebBox, depending on the type of inverter.
6.2.2 Connecting the PV Strings to Isolation Terminals
1. For each cable entry, remove the filler-plugs from the cable glands.
2. Guide the strings through the cable glands into the enclosure interior. Make sure polarity is
correct when doing this.
3. Cut the wires to length and strip 12 mm off the insulation.
4. Connect the wires to the isolation terminals. Make sure polarity is correct when doing this.
5. Tighten the cable glands.
6.2.3 Connecting the PV Strings to the SUNCLIX DC Plug
Connectors
Requirement:
☐ There is one SUNCLIX DC plug connector for each string cable.
☐ PV1-F cable is available.
C LED 3, orange Data transmission
D LED 4, red Failure of the control board
Maximum Number of Strings
If you connect more PV strings than the calculated maximum, it is not possible to detect the
failure of one PV string.
• Adhere to the maximum number of PV strings which can be connected in parallel.
Position LED Meaning