Nrse Input (Eight Channels); Diff Input (Four Channels); Analog Output Configuration - National Instruments DAQCard-1200 User Manual

Analog Output Configuration

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NRSE Input (Eight Channels)

NRSE input means that all signals are referenced to the same common
mode voltage, which is allowed to float with respect to the analog ground
of the DAQCard-1200. This common mode voltage is subsequently
subtracted out by the instrumentation amplifier. NRSE configuration is
useful when measuring ground-referenced signal sources.
Considerations in using the NRSE configuration are discussed in
Chapter 3, Signal Connections. Notice that in this mode, the return path of
the signal is through the negative terminal of the amplifier, available at the
connector through the pin AISENSE/AIGND.

DIFF Input (Four Channels)

DIFF input means that each input signal has its own reference, and the
difference between each signal and its reference is measured. The signal
and its reference are each assigned an input channel. With DIFF input
configuration, the DAQCard-1200 can monitor four different analog input
signals.
Considerations for using the DIFF configuration are discussed in
Chapter 3, Signal Connections. Notice that the signal return path is through
the negative terminal of the instrumentation amplifier and through
channel 1, 3, 5, or 7 depending on which channel pair you select.
You can set the analog output on the DAQCard-1200 to either bipolar or
unipolar configurations.
Parameter
Analog Output CH0 Polarity
Analog Output CH1 Polarity
Chapter 2
Bipolar—±5 V (default setting)
Unipolar—0–10 V
Bipolar—±5 V (default setting)
Unipolar—0–10 V
2-5
Installation and Configuration
Configuration
DAQCard-1200 User Manual