Programming instructions

© National Instruments Corporation 19-1 LabVIEW Data Acquisition Basics Manual
19
Hardware and Software Setup
for Your SCXI System
SCXI hardware provides signal conditioning close to the signal source and
increases the number of analog and digital signals that can be analyzed by
a data acquisition (DAQ) device. With PC compatible computers, SCXI
can be configured in two ways—a front-end signal conditioning system for
plug-in DAQ devices, or an external data acquisition and control system.
Furthermore, when SCXI is configured as an external data acquisition and
control system, it can be connected to the computer’s parallel port using an
SCXI-1200, or the computer’s serial port using either an SCXI-2000
remote chassis or an SCXI-2400 remote communications module in an
SCXI-100x chassis. For Macintosh computers, SCXI hardware can only be
used as a front-end signal conditioning system for plug-in DAQ devices.
Figure 19-1 demonstrates these configurations.
Figure 19-1.
SCXI System
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SCXI
SCXI Signal
Conditioning
Modules
Conditioned
Signals
PC Plug-In
DAQ Board
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SCXI
SCXI Signal
Conditioning and
DAQ Modules
Front-End Signal Conditioning for Plug-In Data Acquisition Boards
Parallel Port Link
SCXI-1200 12-Bit Data
Acquisition and Control Module
External Data Acquisition and Control System
SCXI
1140