3.2.3
Interfaces
You can configure the interfaces and the web server in the Settings menu. The device has the following inter-
faces for communication and remote monitoring.
Ethernet interface
The device features two switched Ethernet ports to enable the user to, for example, connect several devices in
series if the user prefers a linear topology.
RS485-Interface
The device features two RS485-Interfaces. One RS485-Interface is earmarked for communication with a string-
combiner-box. This can be controlled using the Modbus RTU protocol. Data loggers that cannot be connected
via Ethernet can be connected to the other RS485-Interface. The Sunspec and KACO protocol are supported in
this case.
USB interface
The device's USB connection is a type A socket. It is located on the communication circuit board. The USB con-
nection is specified to draw 500 mA of power.
Use the USB interface to read out stored operating data, load firmware updates or device configurations using
a FAT32-formatted USB stick (max. 4GB).
A connection to the unit's internal web server can be established via a plugged-in USB WiFi stick. In addition to
commissioning, service information and firmware updates, more extensive configurations are also possible via
the web interface.
"Inverter Off" input / DRM 0 for Australia
In addition to the safety functions, the internal interface switches can also be actuated via the "Inverter Off" in-
put.
The Powador-protect or a protective device from another manufacturer can be used for this purpose.
If a Powador-protect is used as the central interface protection, the fail-safe disconnection of suitable KACO in-
verters from the public grid can be carried out by the internal interface switches instead of separate interface
switches. This requires the inverters in the photovoltaic system to be connected to the Powador protect.
Information on installation and use can be found in this manual, in the Powador protect operating instructions
and in the instructions for use of the Powador protect on the KACO web site.
At the “Inverter Off” input, instead of the Powador-protect an interface protection device from another sup-
plier can also be connected to actuate the internal interface switches.
3.3
Plant layout
Inverter
with circuit-breaker
String combiner with DC isolator switch
*
Switch box
Inverter
with circuit-breaker
AC
AC
String combiner with DC isolator switch
RS485
PV generator
PV generator
Fig. 6:
Circuit diagram with a short or long supply cable to the inverter
3 | Device description
Manual
KACO blueplanet 110 TL3 KACO blueplanet 125 TL3
Page 10
EN-US