National Instruments PCI-8331 用户手册

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Chapter 1
Introduction
1-4
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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.
Daisy-Chain Configuration
Star Configuration