2-10
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Chapter 2
Using the Module
Figure 2-8.
PXIe-4340 Single-Channel Block Diagram
Open Coil Detection
When open coil detection is enabled, the PXIe-4340 turns on current sources in parallel to the
AI and RS lines to sense open coils. If the lines become disconnected, the module detects the
increase in voltage and reports this condition to software. The PXIe-4340 also senses the
impedance connected to the excitation lines and reports a high-impedance connection to
Digit
a
l
S
ine Gener
a
tion
a
nd Demod
u
l
a
tion
M
u
ltiple
x
er
100 k
˖
100 k
˖
AI+
AI–
Open Coil Detection
with Di
sab
le Option
S
elf C
a
li
b
r
a
tion
S
o
u
rce
S
elf C
a
li
b
r
a
tion
S
o
u
rce
M
u
ltiple
x
er
100 k
˖
100 k
˖
R
S
+
R
S
–
Open Coil Detection
with Di
sab
le Option
EX+
EX–
DAC
Loc
a
l
S
en
s
e
Open Coil
Detection
Open Coil
Detection
ADC
ADC
