Advantech PCI-1742U handleiding
Handleiding
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PCI-1742U User Manual 24
3.2.2 Differential Channel Connections
The differential input channels operate with two signal wires for each
channel, and the voltage difference between both signal wires is mea-
sured. On PCI-1742U, when all channels are configured to differential
input, up to 8 analog channels are available.
If one side of the signal source is connected to a local ground, the signal
source is ground-referenced. Therefore, the ground of the signal source
and the ground of the card will not be exactly of the
same voltage. The
difference between the ground voltages forms a common-mode voltage
(V cm
).
To avoid the ground loop noise effect caused by common-mode voltages,
you can connect the signal ground to the Low input. Figure 3-3 shows a
differential channel connection between a ground-reference signal source
and an input channel on the PCI-1742U. With this connection, the PGIA
rejects a common-mode voltage V
cm between the signal source and the
PCI-1742U ground, shown as V
cm in Figure 3-3.
Figure 3.3: Differential Connection - Ground Signal
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Productinformatie
| Merk | Advantech |
| Model | PCI-1742U |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 5110 MB |
