SMA SSM16-11 - Manual (Page 45)

SMA Solar Technology AG 7 Commissioning
Installation Guide SSM16-24-IA-IEN105120 45
2. When the jumpers of the String Monitor Units of the other Sunny String-Monitors of the string
have been plugged in, remove the jumpers.
3. Make sure that the terminating resistor at the hub in the Sunny Central is plugged into the
"485 Out" RJ45 socket.
7.2.3 Noting the Serial Number of the Piggy-Backs for Data
Processing
The serial number of the Piggy-Backs for data processing serves to identify the String Monitor Unit.
The position of the serial number depends on the production version of the Piggy-Back for data
processing.
All the serial numbers of the Piggy-Backs for data processing in all the Sunny String-Monitors must be
written down in the commissioning report. You need the serial numbers for detecting the
Sunny String‑Monitors.
Figure 18: Possible position of the serial number
• Identify the serial numbers and note them in the commissioning report.
7.2.4 Filling In the Commissioning Report
• Check the following points and document them in the commissioning report:
– Polarity of the DC voltages at the string inputs and at the DC main cables.
– All strings have similar voltage values.
– Check for the absence of ground faults on the strings and the DC main cables.
– Inspect the screw connections visually.
– Fuses correspond to the system design.
Position Designation
A Serial number on the left
B Serial number in the centre
C Serial number on the right
A B C