Programming instructions

Chapter 19 Hardware and Software Setup for Your SCXI System
LabVIEW Data Acquisition Basics Manual 19-2
© National Instruments Corporation
Figure 19-2 shows the components of an SCXI system. An SCXI system
consists of an SCXI chassis that houses signal conditioning modules,
terminal blocks that plug directly into the front of the modules, and a cable
assembly that connects the SCXI system to a plug-in DAQ device or the
parallel or serial port of a computer. If you are using SCXI as an external
DAQ system where there are no plug-in DAQ devices, you can use the
SCXI-1200 module, which is a multifunction analog, digital, and timing
I/O (counters) module. The SCXI-1200 can control several SCXI signal
conditioning modules installed in the same chassis. The functionality of the
SCXI-1200 module is similar to the plug-in 1200 series devices.
Figure 19-2.
Components of an SCXI System
Refer to the SCXI tables in Appendix B,
Hardware Capabilities
, of the
LabVIEW Function and VI Reference Manual
, for tables containing
specifications for all the SCXI modules, or refer to the LabVIEW
Online
Reference
, by selecting
Help»Online Reference…
. This appendix also
includes a list of all the SCXI modules and the compatible terminal blocks.
How do you connect the transducers to the SCXI modules? How do you set
the jumpers on the SCXI modules before they are placed in the chassis? For
information on how to set up each module and transducer, consult your
hardware user manuals and the
Getting Started with SCXI
manual.
How do you transfer data from the SCXI chassis to the DAQ device or
parallel or serial port? Figure 19-3 shows a diagram of an SCXI chassis.
When you use SCXI as a front-end signal conditioning system, the analog
and digital bus backplane, also known as the SCXIbus, transfers analog
and/or digital data to the DAQ device. Some of the analog and digital lines
on the DAQ device are reserved for SCXI chassis communication. To find
out which lines are reserved on your device, refer to the tables in
S
C
X
I
1
1
4
0
S
C
X
I
1
1
4
0
SCXI-1001
M
A
IN
F
R
A
M
E
SCXI
Terminal
Blocks
Signal
Conditioning
and/or
Data Acquisition
Modules
SCXI Chassis SCXI
Cable Assembly
(or Parallel Port
Cable)
Plug-in
DAQ Board
(Optional)
Personal Computer