Specifications

Expanded Systems Guide18
3 Install the Expansion|HD host card in the low-
est numbered available slot in your computer.
• In most Windows computers, this will be
the slot farthest from the graphics card.
• In most Mac computers, this will be the
slot closest to the graphics card.
Connecting Power to the
Expansion|HD
The AC Power connector on the rear panel of
the Digidesign Expansion|HD accepts a standard
AC power cable. The Expansion|HD is auto
power-selecting (100V to 240V) and will auto-
matically work with a standard modular cable to
connect to AC power receptacles in any country.
Connecting AC Power and Standby
Mode
The Digidesign Expansion|HD requires an AC
connection to power its PCI bus. The front panel
Power switch toggles the Expansion|HD be-
tween standby and operating modes.
To connect power to the Digidesign Expansion|HD:
 Connect the supplied AC cable to the AC con-
nector on the back panel of the Expansion|HD.
The power switch on the front panel flashes to
indicate standby mode.
Connection to a live AC power source automat-
ically supplies power to the Expansion|HD chas-
sis PCI bus, but does not power the unit on for
operation.
Installing Pro Tools|HD Cards
To install Digidesign audio cards in the chassis:
1 Make sure the Expansion|HD is powered off.
To ensure proper grounding, make sure the Ex-
pansion|HD is connected to a power source
(such as a power strip or wall outlet), using the
supplied AC cable.
2 Install the Pro Tools HD Core card in the first
PCI slot of the expansion chassis. (This is the
second slot from the right when the chassis is
viewed from the front.) Do not use the video
slot closest to the power supply.
3 Install the remaining cards in successive card
slots in the chassis, in the following order:
•HD Accel
•HD Process
Refer to your computer’s documentation to
verify slot order.
Slot numbering for Digidesign Expansion|HD
Only Pro Tools|HD (for PCI) cards can be
installed in the chassis. PCIe cards are not
supported.
654321
Video slot