National Instruments NI 6014 - Manual (Page 22)

Chapter 3 Hardware Overview
NI 6013/6014 User Manual 3-2 ni.com
Analog Input
The AI section of the NI 6013/6014 is software configurable.
The following sections describe in detail each AI setting.
Input Mode
The NI 6013/6014 has two input modes—nonreferenced single-ended
(NRSE) mode and differential (DIFF) mode. NRSE mode provides up to
16 channels. DIFF input mode provides up to eight channels. Input modes
are programmed on a per channel basis for multimode scanning.
For example, you can configure the circuitry to scan 12 channels—four
differentially configured channels and eight single-ended channels.
Table 3-1 describes the two input modes.
For diagrams showing the signal paths of the two configurations, refer to
the
Connecting Analog Input Signals section of Chapter 4, Connecting
Signals .
Table 3-1. Available Input Modes
Mode Description
DIFF A channel configured in DIFF mode uses two AI
lines. One line connects to the positive input of
the programmable gain instrumentation amplifier
(PGIA) on the device, and the other connects to
the negative input of the PGIA.
NRSE A channel configured in NRSE mode uses one AI
line, which connects to the positive input of the
PGIA. The negative input of the PGIA connects to
AI sense (AISENSE).