NI 9232 Operating Instructions and Specifications
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© National Instruments
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The NI 9232 can also provide an IEPE excitation current for each
channel to measure IEPE sensors. Typical IEPE sensors have a
case that is electrically isolated from the IEPE electronics, so
connecting the sensor to the NI 9232 results in a floating
connection even though the case of the sensor is grounded.
NI 9232 Circuitry
The NI 9232 analog input channels are referenced to an isolated
ground through a 50
Ω
resistor. Each channel is protected from
overvoltages. The input signal on each channel is buffered,
conditioned, and then sampled by an isolated 24-bit Delta-Sigma
ADC. You can configure each channel in software for AC or DC
coupling. For channels set to AC coupling, you can turn the IEPE
excitation current on or off. Refer to the software help for
information about configuring channels on the NI 9232.
