2-2
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Chapter 2
Using the NI PXIe-4357
Figure 2-1.
Input Circuit and RTD Wiring Diagram for One NI PXIe-4357 Channel
Grounding and Shielding Considerations
Caution
To ensure the specified EMC performance, operate this product only with
shielded cables and accessories.
The NI PXIe-4357 is isolated from chassis (earth) ground, which allows for the connection of
floating RTD sensors and RTD sensors with a common-mode voltage of up to 60 VDC relative
to chassis ground. However, regardless of the channel-to-ground voltage, the module is not
designed to operate with external voltages between channels.
If you are using a shielded RTD, connect the shield to EX– using the screw terminal on the
terminal block. Refer to the
NI PXIe-4357 and TB-4357 Installation Guide and Terminal Block
Specifications
document for details about connecting field wiring and shields to the terminal
block. Figure 2-2 illustrates a typical shielding configuration.
1
EX+/– connection for 2-,
3
-
a
nd 4-wire
2
AI+
s
en
s
e wire for 4-wire
3
AI–
s
en
s
e wire for
3
-
a
nd 4-wire
1
2
3
1
EX+
AI+
AI–
EX–
