National Instruments Multisystem eXtension Interface NI PXI-8360 - Manual (Page 29)

Appendix B Common Questions
MXI-Express Series User Manual B-4 ni.com
controller. Now with MXI-Express, multiple chassis are connected in
parallel and can be powered on in any order, except that you need to ensure
that the last component powered on is the host PC.
For more details, refer to the Powering Up the MXI-Express System section
of Chapter 2, Hardware Installation .