2
Ref Component Description
ExpressCard slot Accepts an ExpressCard/34 or ExpressCard/54 for additional
functions.
PC card slot Accepts a PC card for additional functions.
Serial connector
(COM3)
Connects a serial device.
Scenario A
If the Expansion Unit kit was purchased separately for a standard X600 model,
you have to install the Expansion Unit by yourself.
NOTE: You must use the 230 W AC adapter with the computer that has the
Expansion Unit installed.
Scenario B
If your computer model is X600 Pro-PCI, the lower half of the computer is the
Expansion Unit.