Connecting Signals - National Instruments NI 447 Series User Manual

Chapter 2 Using the NI 447X

Connecting Signals

To minimize noise and ensure more accurate measurements, do not allow the
Note
connector shells of your SMB cables, SMB-to-BNC adapters, or BNC cables to touch each
other, the PCI-bus computer, or the PXI or CompactPCI chassis and controller.
NI 447X User Manual
NI-DAQ documents and in the NI-DAQ Function Reference Help
(Start»Programs»National Instruments»DAQ»NI-DAQ Help) for
more information.
The front panels of the NI PCI/PXI-4472 devices are shown in Figure 2-1,
and the NI PCI-4474 front panel is shown in Figure 2-2. There are eight
male SMB connectors on the front panel of the NI PCI/PXI-4472 and four
male SMB connectors on the front panel of the NI PCI-4474 for connecting
analog signals. Each NI 447X device also has one male SMB connector for
connecting a digital trigger. The analog inputs are unbalanced differential
channels with individually configurable AC/DC coupling and IEPE current
conditioning. The digital input can accept TTL/CMOS-compatible signals.
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