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Archived: Configuration Options when Using Multiple PXI Chassis and MXI-3 and MXI-4 Kits

This document has been archived and is no longer updated by National Instruments

Hardware: PXI/CompactPCI

Can I have multiple MXI-3 or MXI-4 cards in one PC or PXI chassis? What are the differences between daisy chaining PXI chassis and using the star configuration?

You can have more than one MXI-3 or MXI-4 card in a PXI chassis. You can also have a MXI-3 and a MXI-4 card in the same PC. Each can branch off to its own daisy chain with another PXI chassis if needed.

In a daisy chain configuration (Figure 1), PXI chassis are connected in series to other PXI chassis or to a PC acting as the system controller. A daisy chain can be beneficial in spanning long distances between your system controller and the location where measurements must be taken. The only drawback to the daisy chain configuration is that the throughput (or rate of data transfer) is shared as data crosses another bridge to the next PXI chassis. The slower throughput should be considered if you are dealing with high-speed data acquisition.


In the star configuration (Figure 1), multiple PCI-MXI-3 or PCI-MXI-4 cards are installed in a PC or multiple PXI-MXI-3 or PXI-MXI-4 cards are installed in a PXI chassis. Each card is then connected to another PXI chassis. This setup is often referred to as a parallel system. The slower throughput found with the daisy chain configuration is not an issue when using the star configuration.

The Set Up Your PXI-MXI-3 System Manual explains how to set up your PXI system using MXI-3 for one or multiple PXI chassis.

Related Links:
Product Manuals: Set Up Your PXI-MXI-3 System
Products and Services: PXI Remote Control Module
KnowledgeBase 2OPE9PWD: Slot Detection of PXI Modules in a Multi-Chassis Configuration Under Windows 9x/2000/XP


Report Date: 03/15/2002
Last Updated: 04/24/2017
Document ID: 2JE8N76I

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