Chapter 3
Hardware Overview
NI PXI-6682 Series User Manual
3-6
ni.com
Note
The NI PXI-6682H does not have the CLKIN connector.
•
CLKIN
—Clock Input. This connector supplies the module with
a clock that can be programmatically routed to the PXI backplane
(PXI_CLK10_IN) for distribution to the other modules in the chassis
when the NI PXI-6682 is installed in PXI slot 2.
•
PFI<0..2>
—Programmable Function Interface <0..2>. These
connectors can be used for either input or output. You can program the
behavior of these PFI connections individually.
Additionally, PFI0 can function as an input for IRIG-B DC or AM.
Caution
Do not connect an AM signal to PFI0 when the PFI line is configured for
digital operations. This could cause damage to the digital circuitry, the device driving the
AM signal, or both. Always ensure the line is configured for IRIG-B AM operation before
connecting an IRIG-B AM signal.
•
RJ-45 Ethernet
—10/100 Mbit Ethernet connection. This connector
allows the module to communicate via standard Ethernet cabling.
Caution
Connections that exceed any of the maximum ratings of input or output signals
on the NI PXI-6682 Series can damage the module, the computer, or other devices
connected to the NI PXI-6682 Series. NI is
not
liable for any damage resulting from such
signal connections.
Hardware Features
The NI PXI-6682 Series performs the following functions:
•
Synchronization using GPS, IRIG-B, PPS, or IEEE 1588.
•
Generation of future time events and clock signals.
•
Timestamping incoming signals with the synchronized time.
•
Routing internally or externally generated signals from one location
to another.
Table 3-5 outlines the function and direction of the signals discussed in
detail in the remainder of this chapter. These signals are also identified in
Figure 3-2.
