AT2550 User Guide
December 8, 2003
page 9 of 17
3.2.5 WRITE PROTECT
The WP jumper on header J2 is used to write-protect the drive. The default
position of this jumper is OFF. Installing the WP jumper inhibits all further writes
to the drive, while read accesses occur as normal.
WP: Write Protect
configured for normal
operation -- jumper off
3.2.6 OPTION JUMPERS
The OPT1 and OPT2 jumpers are used for factory test functions or special
functions only, and should always be left open.
OPT1,2: Option Jumpers
configured for normal
operation -- jumpers off
3.2.7 TX/RX CONNECTIONS
The TX and RX connections are for manufacturing use only.
TX/RX: RS232
Communications
GND
GND
RX
TX
3.2.8 EXTERNAL POWER
The XP pins on the Option Header are used to connect external standby power to
the drive. These pins are connected to the Kicker™ Holdup Circuit. Applied
power should be 5 volts +/- 10%. Do not exceed 6 volts on this line, as internal
damage to the drive may result.
The two outside pins on the header are used to connect power to the holdup
circuit. A third pin is needed to connect the grounds of the drive to the power
source.
