For further support information, refer to the Technical Support and Professional Services appendix. To comment
on the documentation, send email to techpubs@ni.com.
The PXI-PCI 8331 and 8336 hardware is warranted against defects in materials and workmanship for a period of one year from the date of
shipment, as evidenced by receipts or other documentation. National Instruments will, at its option, repair or replace equipment that proves to
be defective during the warranty period. This warranty includes parts and labor.
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any equipment will be accepted for warranty work. National Instruments will pay the shipping costs of returning to the owner parts which are
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In no event shall National Instruments be liable for any damages arising out of or related to this document or the information contained in it.
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Compliance with FCC/Canada Radio Frequency Interference
Regulations
Determining FCC Class
The Federal Communications Commission (FCC) has rules to protect wireless communications from interference. The FCC
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or Class B (for use in residential or commercial locations). All National Instruments (NI) products are FCC Class A products.
Depending on where it is operated, this Class A product could be subject to restrictions in the FCC rules. (In Canada, the
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Consult the FCC Web site at
FCC/DOC Warnings
This equipment generates and uses radio frequency energy and, if not installed and used in strict accordance with the instructions
in this manual and the CE marking Declaration of Conformity*, may cause interference to radio and television reception.
Classification requirements are the same for the Federal Communications Commission (FCC) and the Canadian Department
of Communications (DOC).
Changes or modifications not expressly approved by NI could void the user’s authority to operate the equipment under the
FCC Rules.
Class A
Federal Communications Commission
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC
Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated
in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and
used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this
equipment in a residential area is likely to cause harmful interference in which case the user is required to correct the interference
at their own expense.
www.fcc.gov for more information.
Canadian Department of Communications
This Class A digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations.
Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.
Compliance with EU Directives
Users in the European Union (EU) should refer to the Declaration of Conformity (DoC) for information* pertaining to the
CE marking. Refer to the Declaration of Conformity (DoC) for this product for any additional regulatory compliance
information. To obtain the DoC for this product, visit
and click the appropriate link in the Certification column.
* The CE marking Declaration of Conformity contains important supplementary information and instructions for the user or
installer.
ni.com/hardref.nsf, search by model number or product line,
Appendix C
Technical Support and Professional Services
Glossary
Index
MXI-4 Series User Manualvini.com
About This Manual
This manual describes the features, functions, and operation of the MXI-4
series of products. The four products in this series are the PCI-8331,
PXI-8331, PCI-8336, and PXI-8336. The PXI-PCI 8331 and 8336
incorporate MXI-4 technology, which couples two physically separate PCI,
CompactPCI, or PXI buses with a data link capable of 1.5 Gbit/s serial data
rates.
Conventions
The following conventions appear in this manual:
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.
italicItalic text denotes variables, emphasis, a cross reference, or an introduction
to a key concept. This font 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.
MXI-4 cardMXI-4 card refers to any of the following cards, unless otherwise noted:
PCI-8331, PXI-8331, PCI-8336, and PXI-8336.
MXI-4 dyadMXI-4 dyad refers to any of the following 4 pairs of MXI-4 cards:
This chapter describes the MXI-4 series of products, lists what you need to
get started, and explains how to unpack and set up your hardware.
The four products in this series are the PCI-8331, PXI-8331, PCI-8336, and
PXI-8336. For the remainder of this manual the term MXI-4 card will refer
to any of the products in the MXI-4 series.
MXI-4 cards must always be installed as either a pair of PXI cards or as a
PCI card and a PXI card. The term MXI-4 dyad will refer to one of the four
allowable pairings of MXI-4 cards which are described in the Conventions
section of the About This Manual.
About the MXI-4 Series
Description and Features
A MXI-4 dyad is a PCI master/slave implementing the PCI-PCI bridge
register set. It couples two physically separate buses with either a copper or
fiber-optic data link capable of 1.5 Gbit/s serial data rates. With the MXI-4
dyad, you can do the following:
•Control a PXI/CompactPCI backplane with a PCI based PC
•Control a PXI/CompactPCI backplane with another PXI/CompactPCI
system
•Increase the available number CompactPCI or PXI slots for your
application
•Physically separate the measurement or automation system from
a host PC
•Combine PCI, CompactPCI, and PXI devices in the same system
MXI-4 cards are used in two basic configurations, both of which are shown
in Figure 1-1:
•A PCI MXI-4 in a PC, connected to a PXI MXI-4 in the controller slot
•A PXI MXI-4 in a non-controller slot of a PXI/CompactPCI chassis
Note The PXI MXI-4 is capable of automatically detecting whether it is in a controller or
non-controller slot and configuring itself accordingly.
of a PXI/CompactPCI chassis.
with an embedded controller, connected to a PXI MXI-4 in the
controller slot of another PXI/CompactPCI chassis.
PC to PXI/CompactPCI
PXI/CompactPCI to PXI/CompactPCI
Figure 1-1. Basic MXI-4 Configurations
MXI-4 Series User Manual1-2ni.com
Larger MXI-4 Systems
Using multiple MXI-4 dyads, large PCI/PXI/CompactPCI systems can be
created. The PCI specification makes provisions for up to 255 bus segments
to simultaneously exist in a PCI hierarchy and MXI-4 hardware provides
everything needed to support those provisions.
Notes Keep in mind that some chassis and PCs have more than one PCI bus segment.
The host configuration software (BIOS and OS) and device drivers must support the
number of bus segments and PCI devices that you intend to use.
Figure 1-2 shows how MXI-4 cards can be used to connect multiple
expansion chassis to a PC in both a star and daisy chain topology. The
PC that is shown at the root of the PCI hierarchy in this example could
instead be a PXI/CompactPCI chassis with an embedded controller in its
controller slot. The star topology will give higher performance than the
daisy chain because it minimizes the number of MXI-4 dyads between the
expansion cards and the PC.
Figure 1-2. Star and Daisy Chain MXI-4 Configurations
Note
Adding PCI bridges, such as MXI-4, to a system can create a slight decrease in
performance when communicating with devices behind the bridges.
Although the distance between individual chassis is confined to a
maximum of 10 meters for copper cables and 200 meters for fiber-optic
cables, there is no limit to the total amount of cable in the system.
MXI-4 Series User Manual1-4ni.com
What You Need to Get Started
To set up and use your MXI-4 cards, you need the following:
❑ Two MXI-4 cards of the allowable pairings that comprise a MXI-4
dyad. The allowable pairings are:
•PCI-8331 and PXI-8331
•PCI-8336 and PXI-8336
•PXI-8331 and PXI-8331
•PXI-8336 and PXI-8336
❑ A MXI-4 cable
•A copper cable for 8331 dyads
•A fiber optic cable for 8336 dyads
❑ A host—This can be a PC with PCI slots, or a PXI/CompactPCI
chassis that already has a controller
❑ An expansion chassis—This is the PXI/CompactPCI chassis that you
control with the MXI-4 dyad
Chapter 1Introduction
❑ NI MXI-4 software
Note Your PXI MXI-4 card will work in any standard CompactPCI chassis adhering to
the PICMG CompactPCI 2.0 R2.1 specification, or in PXI chassis that are compatible with
the PXI Hardware Specification, Revision 1.0 or later. Your PCI MXI-4 card will work in
systems compliant with the PCI Specification, Revision 2.2 or later.
Unpacking
Your MXI-4 cards are shipped in antistatic packages to prevent
electrostatic damage (ESD) to the devices. ESD can damage several
components on the device.
Caution Never touch the exposed pins of connectors. Doing so may damage the device.