Siemens SIMEAS R-PMU Manual page 20

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The self-monitoring function of the SIMEAS R-PMU constantly informs the user about the system
status. Relay outputs can be used for remote signaling.
The SIMEAS R-PMU is available in two housing versions. The central unit ZE 8/16 (10" version)
version can be equipped with a data acquisition unit (DAU); the central unit ZE 32/64 (19"
version) with up to four units.
DAKON
The Data Concentrator (DAKON) is an industrial PC to which several SIMEAS R-PMU,
SIMEAS R V2/V3, P531 and digital protection devices can be connected.
In the automatic mode, a DAKON can automatically collect data from the SIMEAS R devices and
fault records from the protection devices and store them in its memory. A DAKON can forward
the data automatically to a server PC.
This is a PC that runs in the "DAKON" mode on OSCOP P.
Server PC
Terminal devices and several DAKONs can be connected to a server PC. Several connected
client PCs can collect and evaluate data from the server PC.
A server PC can forward the collected data to a higher-level server PC.
This is a PC that runs in the "server" mode on OSCOP P.
Evaluation PC
DAKON, SIMEAS R-PMU and SIMEAS Q can be connected to an evaluation PC. This operating
mode is preferably intended for the parameterization at the site and for data evaluation. An
evaluation PC can also be installed in the office and connected to a DAKON or a server PC.
This is a PC that runs in the "evaluation PC" mode on OSCOP P.
Client PC
A client PC is connected to a server PC using a network and is used for evaluating the data that
has been stored in the server PC's database. Client PCs do not have any connection to the
recording devices.
This is a PC that runs in the "client" mode on OSCOP P.
Phasor Data Concentrator (PDC)
The PMU data is sent to a computer that is called the Phasor Data Concentrator (PDC). The data
of several PMUs is processed in the PDC thus ensuring that bottlenecks in the communications
system, line overloads etc. can be detected.
Communication components
Communication between the recording devices, the DAKON and evaluation PCs can be
implemented either via a wide-area network or a local-area network (TCP/IP protocol).
Alternatively, the data can also be exchanged using analog/ISDN modems or star couplers.
Time synchronization
An exact time synchronization of all devices with the DAKON is necessary, in order to ensure
that the records of fault recorders and protection devices in different locations can be compared
to each other. This is done using additional components such as GPS receivers with support for
the DCF77 protocol.
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Digital Fault Recorder, SIMEAS R-PMU, Manual
E50417-H1076-C360-A5, Release 10.2012