SMA Solar Technology AG
5.7 Technical Data of the
Communication Interface
Interface
Parameter
Ethernet
Cables
RJ-45 connector: 2 pcs. RJ45
for Ethernet
Galvanic interface insulation
Direct contact protection
Short-circuit protection
Communication
Cables
Max. number of inverters
Table 5.9 Technical data of the communication interface
1)
For outdoor use, ensure that an appropriate cable is used. If the
cable is very stiff, an intermediate terminal should be used in
order to change from a stiff to a more flexible cable before
entering the inverter. For some cables it might be sufficient to
remove the hard outer mantle of the part of the cable inside
the inverter enclosure. This is to protect the PCB-mounted
RJ-45 Ethernet ports from excessive strain, which could lead
to damage or connection issues.
Figure 5.3 Auxiliary interfaces (cutout of Communication PCB with
RJ-45 Ethernet ports)
Installation Guide
Parameter details
Cable sheath diameter ( ⌀ )
Cable type
Cable characteristic
impedance
Wire size
Cable shield termination
Double/reinforced insulation
Network topology
Maximum cable length
between inverters
Per SMA Inverter Manager
5 Technical Data
Specification
2 x 5 to7 mm
STP cable (Shielded Twisted Pair,
CAT 5e or SFTP CAT 5e)
100 Ω to 120 Ω
24 to 26 AWG (depending on
design of the RJ-45 plug)
Via RJ-45 plug
Yes, 500 Vrms
Yes
Yes
Star and daisy chain
100 m (328 ft)
42
STP60-10-IA-xx-10
1)
51