cable plugs are reversible, and there is no defined upstream or downstream port on the
PXIe-1090.
Note
Although Thunderbolt is a hotpluggable technology, avoid removing the
cable after the system is powered on. Doing so can hang or cause errors in
applications communicating with devices behind MXI-Express Thunderbolt. If a
cable becomes unplugged, plug it back into the system.
For more information about MXI-Express Thunderbolt cabling, go to
Powering On/Off the MXI-Express Thunderbolt System
This chassis includes a feature to follow host power based on the Thunderbolt connection.
Refer to the table below to determine how to power on or off the chassis based on the
connection to the host.
Table 3. Chassis Inhibit Mode: Default (Refer to Inhibit Mode for More Information)
PXIe-1090 Power
Thunderbolt
Connection to Host
Actions Required
To power on the PXIe-1090 Not present
Press the power button
Hot plug a Thunderbolt cable with a
powered on host on the other end
Present
Power on the host
To power off the PXIe-1090 Not present
Press the power button
Present
Hot unplug the Thunderbolt cable
Power off the host
Press the power button > 4 s (this
causes a forced shutdown)
Table 4. Chassis Inhibit Mode: Manual (Refer to Inhibit Mode for More Information)
PXIe-1090 Power
Actions Required
To power on the PXIe-1090
AC on
To power off the PXIe-1090
AC off
Observe the PXIe-1090 LED status where applicable. A properly connected and powered up
system should report a valid link and power status once the host PC is powered on. Refer to
LED Indicators
for more information.
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PXIe-1090 User Guide
