National Instruments Data Acquisition Device NI USB-621x - Manual (Page 24)

© National Instruments Corporation 2-1 NI USB-621x User Manual
2
DAQ System Overview
Figure 2-1 shows a typical DAQ system, which includes the USB-621x
device, programming software, and PC (DAQ systems involving the
USB-621x Mass Termination device can also include signal conditioning
devices and a cable for accessory connection). The following sections
contain more information about the components of a typical DAQ system.
Figure 2-1. Components of a Typical DAQ System
DAQ Hardware
DAQ hardware digitizes signals, performs D/A conversions to generate
analog output signals, and measures and controls digital I/O signals.
Figure 2-2 features components common to all USB-621x devices.
Personal Computer
or Laptop
DAQ
Hardware
DAQ
Software