National Instruments SCXI Series - Figure 4-5. Quarter-Bridge Configurations

Chapter 4 Connecting and Using Accessories and Transducers
Getting Started with SCXI 4-12 www.ni.com
Figure 4-5. Quarter-Bridge Configurations
Quarter-Bridge Configuration I
Dummy Resistor (User Installed)
–
+
EX+
CH+
EX–
–+
+
–
SCXI-1121 Module with
Voltage Excitation and
Half-Bridge Completion
Network Enabled
CH–
Quarter-Bridge Configuration II
–
+
EX+
CH+
EX–
+
–
SCXI-1121 Module with
Voltage Excitation and
Half-Bridge Completion
Network Enabled
–+
CH–
R
1
R
2
R
L
R
L
R
L
R
3
V
EX
V
IN
•
1+
–4 V
r
GF (1 + 2V
r
)
R
L
R
g
V
EX
R
1
R
2
V
IN
R
g
(unstrained dummy)
R
L
R
L
R
L
•
1+
–4 V
r
GF (1 + 2V
r
)
R
L
R
g