Figure 2-3. Two-Wire Wiring Diagram - NI SCXI-1127 User Manual

Chapter 2 Using the SCXI-1127
OUT0±
Multiplexer Output
+
V
1
–
R
1
V
2
Thermocouple
SCXI-1127 User Manual
the AB0 switch to connect the multiplexer output to the high-voltage
analog backplane. You can do this through NI-SWITCH.
Figure 2-3 shows an example of a two-wire configuration using the
SCXI-1331 terminal block. The diagram shows the two-wire terminal
block connections for channels 2, 5, 24, and 27. Channel 2 measures a
voltage source (V
the negative channel labeled -2. The output of the multiplexer is available
through the OUT0 bus.
–
+
R
2
You can connect different types of two-wire inputs to the SCXI-1127. For
example, in Figure 2-3, a thermocouple (V
channel 27, and on channel 5 (R
being made. Consult the
more information on temperature compensation measurements for making
accurate thermocouple measurements.
). The positive terminal of channel 2 is labeled +2 with
1

Figure 2-3. Two-Wire Wiring Diagram

) and 24 (R
1
Making Temperature Measurements
2-4
SCXI-1127
) is shown connected to
2
) resistance measurements are
2
section for
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