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4.3 Data Acquisition Modules
27Digital Fault Recorder, SIMEAS R-PMU, Manual
E50417-H1076-C360-A5, Release 10.2012
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.
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.
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.
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.
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.
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.
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.
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