National Instruments Data Acquisition Device E Series - Manual (Page 53)

Chapter 2 Analog Input
E Series User Manual 2-20 ni.com
Connecting Analog Input Signals
The following sections discuss the types of signal sources, specify the use
of single-ended and DIFF measurements, and provide recommendations
for measuring both floating and ground-referenced signal sources.
Table 2-6 summarizes the recommended input configuration for both types
of signal sources.