5 Installation
SMA Solar Technology AG
30
STPS60-IA-xx-13
Installation Manual
Figure 23: Grounding conductor symbol
6. Optional: Make an extra PE connection at the
secondary PE grounding points using the external
device grounding bolt delivered with the inverter. See
figure 5.2.
7. All conductors must be correctly attached with the
correct torque. See Section 11.4, page 49.
5.9 Ethernet Connections
Cable requirements:
• Cables must be suitable for communication interfaces
• If the cable is very stiff, an intermediate terminal should
be used to achieve greater flexibility of the cable
before it is connected to 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. In this way, the RJ45 Ethernet
connectors mounted on the printed circuit boards are
protected against excessive stress, which could lead to
damages or problems with the connection.
Procedure:
1. Disconnect the inverter (see Section 8, page 35).
Figure 24: Running cables through cable glands
2. Route each Ethernet cable with the RJ45 connector
through a cable gland and into the base of the inverter.
3. Make a cut into a rubber grommet. Place the rubber
grommet in the gland to ensure proper seal.
4. Insert the RJ45 connector into the socket of the Ethernet
interface.
5.10 DC Connection
Danger due to ground fault on DC side during
operation
Due to the transformerless topology of the product, the
occurrence of ground faults on DC side during operation
can lead to irreparable damage. Damages to the product
due to a faulty or damaged DC installation are not
covered by warranty. The product is equipped with a
protective device that checks whether a ground fault is
present during the starting sequence. The product is not
protected during operation.
• Ensure that the DC installation is carried out correctly
and no ground fault occurs during operation.
Danger to life due to burns caused by electric arcs
through short-circuit currents
Short-circuit currents in the battery can cause heat build-up
and electric arcs. Heat build-up and electric arcs may
result in lethal injuries due to burns.
• Prior to any work, disconnect the battery from the
product via an external disconnection device.
• Observe all safety information of the battery
manufacturer.
Damage to the inverter due to reverse polarity of
the DC cables
The inverter is protected against short-term reverse
polarity. Not correcting reverse polarity results in
irreparable defects of the inverter and will void the
warranty.
• Make sure that the cables are properly connected to
the inverter so that the inverter can feed in DC input
voltage.
• Only connect batteries with reverse polarity
detection to the inverter.
