Features Of The Individual Acquisition Modules (Daus) - Siemens SIMEAS R-PMU Manual

4.3.2

Features of the Individual Acquisition Modules (DAUs)

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.
VCDAU (Voltage/Current Data Acquisition Unit)
8 analog (4 x voltage/4 x current) and 16 binary signals
The VCDAU is used for recording alternating current/voltage and binary signals. The typical
application is monitoring a feeder or a transformer feeder bay. The calculated variables are
derived from the input variables current and voltage.
Note
If a VCDAU is removed from the frame, the current terminals are automatically short-circuited.
Nevertheless, you have to handle the secondary current transformer circuits with care.
VDAU (Voltage Data Acquisition Unit)
8 analog (8 x voltage) and 16 binary signals
This module is used for recording alternating voltages and binary signals. The typical application
is recording busbar voltages.
CDAU (Current Data Acquisition Unit)
8 analog (8 x current) and 16 binary signals
The CDAU is used for recording alternating currents and binary signals. The typical application
is monitoring two feeders. In connection with a VCDAU or a VDAU, it is also possible to calculate
the powers.
Note
If a CDAU is removed from the frame, the current terminals are automatically short-circuited.
Nevertheless, you have to handle the secondary current transformer circuits with care.
DDAU (DC Data Acquisition Unit)
8 analog (8 x process variables) and 16 binary signals
This module is used for recording process variables, e. g., direct currents in the range of
DC ±20 mA, or direct voltages in the range of DC ±1 V or DC ±10 V.
Note
When a DDAU is pulled out, the 20 mA current input is opened: No short-circuiter is provided
here so that current inputs which are connected in series will lose their measured value in this
case.
BDAU (Binary Data Acquisition Unit)
32 binary channels
The module is used for recording binary signals. A total of 32 binary channels is provided on the
module. The inputs can be designated for DC 24 V, DC 48 V to DC 60 V, DC 110 V to DC 125 V
or DC 220 V to DC 250 V.
Digital Fault Recorder, SIMEAS R-PMU, Manual
E50417-H1076-C360-A5, Release 10.2012
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4.3 Data Acquisition Modules
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