Input Modes; Input Range - National Instruments Multifunction RIO NI R Series User Manual

Table 2-1. Ideal Output Code and AI Voltage Mapping (Continued)
Input Description
Negative full-scale range +1 LSB
Negative full-scale range
Any input voltage

Input Modes

Table 2-2. Available Input Modes for the NI 783 x R/784 x R/785 x R
Input Mode
DIFF When the NI 783xR/784xR/785xR is configured in DIFF input mode, each
channel uses two AI lines. The positive input pin connects to the positive terminal
of the onboard instrumentation amplifier. The negative input pin connects to the
negative input of the instrumentation amplifier.
RSE When the NI 783xR/784xR/785xR is configured in RSE input mode, each
channel uses only its positive AI pin. This pin connects to the positive terminal
of the onboard instrumentation amplifier. The negative input of the
instrumentation amplifier connects internally to the AI ground (AIGND).
NRSE When the NI 783xR/784xR/785xR is configured in NRSE input mode, each
channel uses only its positive AI pin. This pin connects to the positive terminal
of the onboard instrumentation amplifier. The negative input of the
instrumentation amplifier on each AI channel connects internally to the
AISENSE input pin.

Input Range

© National Instruments Corporation
AI Voltage
–9.999695
–10.000000
Output Code
--------------------------------- -
32,768
The NI 783xR/784xR/785xR input mode is software configurable. The
input channels support three input modes—differential (DIFF), referenced
single ended (RSE), and nonreferenced single ended (NRSE). The selected
input mode applies to all the input channels. Table 2-2 describes the three
input modes.
The NI 783xR/784xR/785xR AI range is fixed at ±10 V.
Chapter 2
× 10.0 V
Description
2-5 R Series Multifunction RIO User Manual
Hardware Overview of the NI 78xxR
Output Code (Hex)
(Two's Complement)
8001
8000
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