Siemens SIMEAS R-PMU, Manual, Page: 24 / 296

4
4.1 Device Architecture
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Digital Fault Recorder, SIMEAS R-PMU, Manual
E50417-H1076-C360-A5, Release 10.2012
4.1 Device Architecture
The SIMEAS R-PMU comprises a central processing unit module (CPU module), a power supply
unit module and a communications bus.
The SIMEAS R-PMU can be equipped with five different modules for acquiring the measured val-
ues (DAUs) are provided. Depending on the type, the DAUs record AC voltage, AC current, DC
process signals and / or binary data. The SIMEAS R-PMU ZE 8/16 can be equipped with one
arbitrary DAU and the ZE 32/64 can be equipped with four arbitrary DAUs; for the ZE 32/64,
there is no predefined sequence of the DAUs in the module slots. DAU type and DAU slot must
correspond in the parameterization.
The power supply unit module for the SIMEAS R-PMU is optionally available with a battery pack-
age. This ensures an uninterruptible power supply.
Figure 4-1 Device architecture overview
The processing module communicates with the DAUs via the communications bus.
A LAN interface and serial interfaces are provided for communication with OSCOP P. LAN or,
alternatively, the serial interface at the rear panel can be used to transfer PMU data to a PDC.
The control panel displays error messages and operating conditions of the device. Keys can be
used to set the operating mode of the device and to start manual triggers and reset alarms.
A parallel interface is provided for connecting a local printer where the TAR fault records can be
printed automatically.
The CPU creates its own sync pulses (RTC, free running) or is synchronized externally.