National Instruments NI PXI-8360 用户手册

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Chapter 2
Hardware Installation
© National Instruments Corporation
2-5
Notes
For more information about cables, refer to the 
section of Chapter 3, 
You cannot use two NI PXI-8360 or NI PXIe-8360 boards for chassis expansion as with 
MXI-4. You can connect only an NI PCIe-8361/8362 or an NI ExpressCard-8360 host 
device to an NI PXI-8360 or NI PXIe-8360.
Powering Up the NI ExpressCard MXI System
To power up the NI ExpressCard MXI system, follow these steps:
1.
Power on the expansion chassis.
2.
Power on the host.
Typical PCI-PCI bridges are used to add PCI devices to a PCI hierarchy in 
which all the bridges and devices are contained within a single chassis. 
Because of this, BIOSes and operating systems make the assumption that 
all PCI devices in the entire hierarchy will be available as soon as code 
execution begins at power-up. This assumption means that all of the 
expansion chassis must be turned on before the host PC for the BIOS and 
OS to correctly configure an NI ExpressCard MXI system.
Note
You may add additional chassis using MXI-3 or MXI-4. When using MXI-4, there 
are no restrictions on chassis power-on order, except that the host must be powered on last. 
When using MXI-3, you must power up the chassis in order, beginning furthest from the 
host and ending with the host. Refer to the MXI-3 or MXI-4 documentation for further 
details.
Powering Down the NI ExpressCard MXI System
Because operating systems and drivers commonly make the assumption 
that PCI devices will be present in the system from power-up to 
power-down, it is important not to power off the expansion chassis until 
after the host PC is powered off. Powering off the expansion chassis while 
the host is still on can cause crashes or hangs. The order in which expansion 
chassis are powered off, relative to each other, is not important.