Potential-free relay
The potential-free relay contact closes as soon as there is a fault during operation. You use this function, for example, to
signal a fault visually or acoustically.
Priwatt
The energy that is provided by the PV system can be put to use directly by the appliances that are connected in your
home.
The potential-free contact can switch larger appliances (e.g. air conditioning units) on and off with the Priwatt function
activated. This requires an external power supply and an external load relay.
When the function is active, either the remaining runtime (in hours and minutes) or the shutdown threshold (in kW) is
displayed on the start screen depending on the operating mode selected. The “priwatt” function is not active in the unit’s
delivery state. The option can be configured in the Settings menu.
3.2.3
Interfaces
You can configure the interfaces and the web server in the Settings menu. The device has the following interfaces for
communication and remote monitoring.
Ethernet interface
Monitoring can occur directly on the unit using the integrated Ethernet interface. A local web server is installed in the unit
for this purpose. This can also be used to request measured values remotely.
For monitoring a system comprising several inverters, we recommend you use an external data logging and monitoring
system.
RS485 interface
Use this monitoring option if you cannot check the functioning of the system on-site on a regular basis, e.g. if your place
of residence is located a great distance from the system. To connect the RS485 interface, contact your authorised electri-
cian.
For monitoring your PV system using the RS485 interface, KACO new energy GmbH offers monitoring devices.
USB interface
The USB connection of the device is a type A socket. It is located on the communication circuit board. The USB connection
is specified to draw 500 mA of current.
Use the USB interface to read out stored operating data, load software updates or device configurations using a FAT32-
formatted USB stick.
“Inverter Off” input
In addition to the safety functions, the internal interface switches can also be actuated via the "Inverter Off" input.
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 inverters
from the public grid can be carried out by the internal interface switches instead of separate interface switches. This re-
quires 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 manual and in the instructions
for use of the Powador protect on the KACO web site.
On the "Inverter Off" input, instead of the Powador-protect an interface protection device from another supplier an also
be connected to actuate the internal interface switches.
Digital inputs
You can extend the unit with additional digital inputs by means of an extension module (available from KACO customer
service). This can be used to connect a ripple control receiver or a protective shutdown system.
Kaco blueplanet 29.0TL3
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EN
