Chapter 2 Using the SCXI-1127/1128
SCXI-1127/1128 User Manual 2-24 ni.com
Figure 2-21. SCXI-1332 Connected to an SCXI-1127/1128 Schematic
Matrix Expansion
You can build matrices larger than 4 × 8 by using multiple
SCXI-1127/1128 modules. You can build these larger matrices using row
and column expansion of the 4 × 8 matrix. An example of row expansion
is an 8 × 8 matrix. A 4 × 16 matrix is an example of a column expansion.
A 8 × 16 matrix is an example of both a row and column expansion.
Figure 2-22 shows an example of two SCXI-1332 terminal blocks
connected to form an 8 × 8 matrix. You can connect the terminal blocks
using matrix expansion cables that are available from National Instruments.
The columns of one module are connected to the other module, doubling
the number of rows from four to eight. Figure 2-23 shows the schematic
of an 8 × 8 matrix made this way. The rows in module 2 are now rows
R4 through R7 due to the matrix expansion. Similarly, you can make a
4×16 matrix by connecting the rows of two SCXI-1332s.
Power
Supply
DMM
Load Resistors
c0 c1 c2 c3 c4 c5 c6 c7
r 0
r 1
r 2
r 3
+
–
+
–