G - AA Electric

Sold by AA Electric 1-800-237-8274 Lakeland, FL • Lawrenceville, GA • Greensboro, NC • East Rutherford, NJ www.A-Aelectric.com
Analogue Signal Processing
Weidmüller interface units
2-way isolation separates the signals and decouples the measuring circuits.
Potential differences, caused by long line leads and joint reference
points, are eliminated. Signal isolation also protects from destruction by
overvoltage together with inductive and capacitive gaps.
3-way isolation also separates the supply voltage to the input and output
circuit and allows for operation with only one operating voltage.
Passive isolators have another crucial advantage: they do not need any
additional power supply. The power supply for the module comes from the
input or output circuit and is transferred to the input/output. The outstanding
feature of this current loop feed is its very low own consumption.
There is a wide range of products for measuring temperature. PT100 signals
are converted in 2, 3 and 4-conductor system to standardised signals
0-20 mA, 4-20 mA and 0-10 V.
The modules for connecting to commercially available thermocouples
have cold joint compensation as a standard feature. In addition, they
amplify and linearise the voltage signal issued by the thermocouple. This
guarantees exact conditioning of the analogue signal, eliminating interference
or fault sources.
Frequency converters convert frequency into analogue standard signals
so that subsequent controllers can directly process pulse sequences for
speed or velocity measurement.
No kind of automation is conceivable without AD or DA converters. To
bring together the analogue signals which portray the environment with
the digital processing of the process monitoring system, analogue signals
have to be converted into digital ones. Weidmüller also offers these modules
for the common input and output signals 0 … 20 mA, 4 … 20 mA
and 0 … 10 V, with 8 bit or 12 bit available on the digital side. All modules
have an additional input for freezing the current measured value.
Current monitoring modules control the current values up to 60 A for
dc or ac current. If the values fall below or above the setting, then the
switch output is triggered. Modules with analogue outputs monitor the
current flow continuously using subsequent controllers.
Voltage monitoring modules are used to monitor dc and ac voltage.
The freely adjustable switching threshold can be used to detect and report
fluctuations in voltage as a result of switching procedures or mains overload.
Analogue Signal Processing
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