Operation Manual

Protect PV.250 Operating Instructions
Page 25 of 51 80000027023 BAL, en
6 Interfaces
PV power stations are usually monitored from a central location.
Alongside the PV cells, the inverter is a key component of a power
station, which is why several communication interfaces are avail-
able as standard.
These include relay contacts and optocouplers, as well as various
serial interfaces with protocols for integration into higher-level
monitoring systems.
In terms of monitoring PV power stations, AEG also offers corre-
sponding additional components that are adapted for use with in-
verters and PV generators. This enables the client to monitor an
entire PV power station from a central location easily and reliably.
6.1 Communication Interface
The photovoltaic inverter is equipped with a central communication
unit, a "MultiCom CCC interface".
As well as performing various other functions, this unit facilitates
communication between PV inverters and higher-level monitoring
systems.
A special system of central monitoring via the Internet can be real-
ised using AEG monitoring components such as the "PV.LoG".
The connection between the inverter and PV-LoG has been opti-
mally adapted for monitoring and management purposes and is
established via the Modbus protocol. If you have any further ques-
tions, please contact your supplier.
6.1.1 General
Two separate potential-free serial interfaces are provided as stan-
dard for the purpose of establishing communication connections.
One interface – port X2 – is assigned the AEG-specific protocol
CBSER and is used both locally and remotely for corresponding
service tools. The other one – port X5 – supports the Modbus pro-
tocol and enables the PV inverter to be integrated into higher-level
monitoring and control systems with ease. This port can be
switched over from RS232 to RS485.
An external CAN bus provides a further connection option, which
can be used for monitoring via a remote panel.
The MultiCom CCC interface can be found on the pivot inside the
AC cabinet (item A29.1; see the assembly diagram).