AT2550 User Guide
December 8, 2003
page 4 of 17
3. INSTALLATION
3.1 PROCEDURE
3.1.1 ESD PRECAUTIONS
The AT2550 is sensitive to static electricity. Before handling the AT2550, please
observe the following precautions to avoid ESD damage to the unit:
•
Keep the drive in its shielded bag until ready to install.
•
Ground yourself by touching a grounded chassis frame of the computer, or
use a grounded wrist strap before and during the installation process.
•
Do not touch the exposed drive electronics or connectors. Always handle the
drive by the edges or mounting rails.
3.1.2 CONFIGURATION
Before applying power to the drive, configure the drive using the jumper diagrams
given in Section 3.2. The default configuration is for a single drive system or as
the master in a two-drive system. Change the configuration as required. Never
attempt to change the jumpers while the drive is plugged in and the computer is
on.
3.1.3 CABLE
With the computer off, attach the 44-pin 2mm cable connector to the 2mm
connector on the drive. Note pin 1 orientation and alignment. Care should be
taken when installing the cable, as misalignment can permanently damage the
drive interface. No power cable is required as the 2mm ribbon cable connector
supplies power to the drive.
The AT2550 is UDMA66 compliant with the appropriate cable. If the host system
does not detect the correct cable type, the interface will restrict transfers to
UDMA33 speeds or slower. The type of cable is detected using the signal CBLID.
On UDMA66 compliant cables, this signal is grounded.
