SMA SSM-U-1615 - Manual (Page 36)

10. Unscrew the set screw of the box terminal with an Allen key (AF 6).
11. Connect one DC main cable to each box terminal. To do this, insert the conductors into the
box terminal from below and fasten the set screw of the box terminal (torque: 32 Nm).
12. Ensure that the DC main cables are securely attached.
13. Secure the DC main cables to the external cable support rail.
6.4 Connecting the Ethernet Cables
Up to ten SMA String-Monitors can be connected in line topology to each string monitoring
communication terminal of the inverter (for number of string monitoring communication terminals,
see inverter manual).
The Ethernet cables are connected to LSA+ terminals on the electronic assembly using an LSA+
insertion tool.
Interference in data transmission due to unshielded power cables
If unshielded power cables are used, they generate an electromagnetic field during operation
which may induce interference in network cables during data transmission.
• When laying network cables, observe the following minimum clearances to unshielded
energy cables:
– For installation without separating strip: at least 200 mm
– For installation with aluminum separating strip: at least 100 mm
– For installation with steel separating strip: at least 50 mm
Requirements for Ethernet cables:
☐ Cable type: copper, two-conductor
☐ Number of insulated conductor pairs and insulated conductor cross-section: 4 x 2 x 0.125 mm
2 to 0.205 mm 2
☐ Cable type: at least Cat5 with shielding S-UTP, F-UTP or higher
☐ Maximum cable length: 100 m
6 Installation SMA Solar Technology AG
Operating Manual SSMUXX15-BE-en-10 36