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MXI
Fiber-Optic MXI-Express x4 for PXI Express Series User Manual
MXI-Express for PXI Express: Multisystem eXtension Interface for PCI Express,
CompactPCI Express, and PXI Express Bus Systems
NI PCIe-8375
NI PXIe-8375
Fiber-Optic MXI-Express x4 for PXI Express User Manual
November 2009
372942B-01
Support
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The NI PCIe-8375 and NI PXIe-8375 are warranted against defects in materials and workmanship for a period of one year from the date of
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Electromagnetic Compatibility Information
This hardware has been tested and found to comply with the applicable regulatory requirements and limits for electromagnetic
compatibility (EMC) as indicated in the hardware’s Declaration of Conformity (DoC)
designed to provide reasonable protection against harmful interference when the hardware is operated in the intended
electromagnetic environment. In special cases, for example when either highly sensitive or noisy hardware is being used in close
proximity, additional mitigation measures may have to be employed to minimize the potential for electromagnetic interference.
While this hardware is compliant with the applicable regulatory EMC requirements, there is no guarantee that interference will
not occur in a particular installation. To minimize the potential for the hardware to cause interference to radio and television
reception or to experience unacceptable performance degradation, install and use this hardware in strict accordance with the
instructions in the hardware documentation and the DoC
If this hardware does cause interference with licensed radio communications services or other nearby electronics, which can be
determined by turning the hardware off and on, you are encouraged to try to correct the interference by one or more of the
following measures:
•Reorient the antenna of the receiver (the device suffering interference).
•Relocate the transmitter (the device generating interference) with respect to the receiver.
•Plug the transmitter into a different outlet so that the transmitter and the receiver are on different branch circuits.
Some hardware may require the use of a metal, shielded enclosure (windowless version) to meet the EMC requirements for
special EMC environments such as, for marine use or in heavy industrial areas. Refer to the hardware’s user documentation and
1
for product installation requirements.
the DoC
When the hardware is connected to a test object or to test leads, the system may become more sensitive to disturbances or may
cause interference in the local electromagnetic environment.
Operation of this hardware in a residential area is likely to cause harmful interference. Users are required to correct the
interference at their own expense or cease operation of the hardware.
Changes or modifications not expressly approved by National Instruments could void the user’s right to operate the hardware
under the local regulatory rules.
1
.
1
. These requirements and limits are
1
The Declaration of Conformity (DoC) contains important EMC compliance information and instructions for the user or
installer. To obtain the DoC for this product, visit
and click the appropriate link in the Certification column.
ni.com/certification, search by model number or product line,
Appendix C
Technical Support and Professional Services
Glossary
Index
Fiber-Optic MXI-Express x4 for PXI Express User Manualvini.com
About This Manual
This manual describes the features, functions, and operation of the
Fiber Optic MXI-Express x4 for PXI Express series of products. The
products in this series are the NI PCIe-8375 and the NI PXIe-8375.
Conventions
The following conventions appear in this manual:
»The » symbol leads you through nested menu items and dialog box options
to a final action. The sequence File»Page Setup»Options directs you to
pull down the File menu, select the Page Setup item, and select Options
from the last dialog box.
This icon denotes a note, which alerts you to important information.
This icon denotes a caution, which advises you of precautions to take to
avoid injury, data loss, or a system crash.
boldBold text denotes items that you must select or click in the software, such
as menu items and dialog box options. Bold text also denotes parameter
names.
CompactPCI Express/The terms CompactPCI Express and CPCIe are interchangeable in this
CPCIemanual.
italicItalic text denotes variables, emphasis, a cross-reference, or an introduction
to a key concept. Italic text also denotes text that is a placeholder for a word
or value that you must supply.
monospaceText in this font denotes text or characters that you should enter from the
keyboard, sections of code, programming examples, and syntax examples.
This font is also used for the proper names of disk drives, paths, directories,
programs, subprograms, subroutines, device names, functions, operations,
variables, filenames and extensions, and code excerpts.
PCI Express/PCIeThe terms PCI Express and PCIe are interchangeable in this manual.
PXI Express chassisIn this manual, whenever a PXI Express chassis is referenced, a
CompactPCI Express chassis could be used instead.
PXI Express/PXIeThe terms PXI Express and PXIe are interchangeable in this manual.
Fiber-Optic MXI-Express x4 for PXI Express User Manualviiini.com
Introduction
This chapter describes the Fiber-Optic MXI-Express x4 series of products,
lists what you need to get started, and explains how to unpack and set up
your hardware.
The Fiber-Optic MXI-Express x4 series is an extension of the
MXI-Express series of remote controllers. The two products in this series
are the NI PCIe-8375 and NI PXIe-8375.
Fiber-Optic MXI-Express x4 cards must always be installed as a
PCI Express card and one or more PXI Express cards.
About the Fiber-Optic MXI-Express x4 Series
Description and Features
Fiber-Optic MXI-Express x4 uses PCI Express signals over a cable of up
to 100 m. You can do the following with Fiber Optic MXI-Express x4:
•Control one or more PXI Express or CompactPCI Express chassis with
a PCI Express-based PC
•Physically separate the measurement or automation system from
a host PC (up to 100 m)
•Electrically isolate the measurement or automation system from
a host PC
The simplest Fiber-Optic MXI-Express x4 system consists of an
NI PCIe-8375 in a PC connected to an NI PXIe-8375 in the controller slot
of a PXI Express or CompactPCI Express chassis, as shown in Figure 1-1.
Figure 1-1. Basic MXI-Express x4 Configuration
Larger Fiber-Optic MXI-Express x4 Systems
It is possible to control more than one PXI Express chassis with a single PC.
There are two possible topologies: star topology or daisy-chain topology.
The star topology requires the host PC to have a PCI Express x4 slot
available for each PXI Express chassis you want to control. Each PXI
Express chassis is connected directly to an NI PCIe-8375 installed in the
host computer. This topology has the highest throughput; however, it
requires one PCI Express x4 slot and one NI PCIe-8375 for each
PXI Express chassis. Figure 1-2 shows an example of a star topology.
The NI PXIe-8375 has two Fiber-Optic ports on its front panel: an upstream
port (for connecting towards the host) and a downstream port (which allows
for daisy chaining). In the daisy-chain configuration, only a single
PCI Express x4 slot is required in the host, but the data throughput might
be lower, especially for devices further down the chain. Figure 1-2 also
shows an example of a daisy chain configuration.
Fiber-Optic MXI-Express x4 for PXI Express User Manual1-2ni.com
Daisy-Chain Configuration
Chapter 1Introduction
Star Configuration
Figure 1-2. Topologies for Fiber-Optic MXI-Express x4 Configuration
What You Need to Get Started
To set up and use your Fiber-Optic MXI-Express x4 cards, you need the
following:
❑ One NI PCIe-8375 and one or more NI PXIe-8375 modules
❑ One or more Fiber-Optic MXI-Express x4 cables
❑ A host PC with an available x4 (or wider) PCI Express slot
Note Using a PCI Express slot wider than x4 may result in negotiation down to x1 width.