IBA ibaPADU-D-8AI-U, Руководство пользователя

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ibaPADU-D-8AI-U/-D-8AI-I Manual
Issue 1.4 7
2 Introduction
The ibaPADU (Parallel Analog Digital Unit) device family is designed for data acquisition
of analog and digital signals. The ibaPADU- D devices enhance the device family with
models which support the 32Mbit Flex ibaNet protocol.
The device ibaPADU-D-8AI-U offers 8 digital inputs and 8 analog voltage inputs. The
measuring range of these inputs is adjustable in several stages: ±2.5 V, ±10 V, ±24 V or
±60 V.
The device ibaPADU-D-8AI-I offers 8 digital inputs and 8 analog current inputs with the
following measuring ranges: ±20 mA, 0…20 mA or 4…20 mA.
If no special reference to a device is made in the following text the devices are named
as ibaPADU-D-8AI in general and the description applies to both devices.
Each channel of both devices is galvanically isolated and equipped with its own A/D
converter in order to measure simultaneously all channels.
Filters limit the bandwidth of the input signal in order to reduce disturbances. A digital
antialiasing filter can be activated per channel together with an analog antialiasing filter
(Butterworth). The digital antialiasing filter is adjusted automatically to the configured
sampling rate.
With 32Mbit Flex, the sampling rate can be freely adjusted up to 40 kHz. The maximum
amount of data to be transferred depends on the selected sampling rate: The higher the
sampling rate, the smaller is the amount of data to be transferred. ibaPDA determines
automatically the maximum possible sampling rate, which is dependent on the desired
amount of data and the number of devices in the ring.
With 32Mbit Flex, it is possible to connect up to 15 devices to a ring topology. The signal
limitation applies to the entire ring. Thereby, the distance between the devices can be up
to 2 km. Other 32Mbit Flex-enabled iba devices can be integrated into the ring as well.
For example, it is possible to use an ibaPADU-D device as an extension for an ibaPADU-
S modular system, when all slots are already occupied.
The signals are internally converted and are available via the fiber optic cable interface.
For the connection to a data acquisition system, such as ibaPDA, an ibaFOB-D card is
used with a bidirectional fiber optic cable connection. All signals can be comfortably se-
lected and configured in ibaPDA. The required parameters, like input level, input imped-
ance or filters, can be selected via software for each channel.