Cable Connections
You must make a minimum of two cable connections to your CD-ROM drive. A third
cable connection need be made only if you are using a soundboard in your computer.
The two cable connections that you must make are:
1) SCSI cable
2) power cable
The SCSI cable you will need is included with your drive. It is a standard 50-pin flat
ribbon cable with three connectors (one at each end and one in the middle). If you
are connecting the host adapter to your Plextor drive only, use the two end connectors
and ignore the one in the middle. If you already have one other SCSI peripheral (such
as a hard disk), and your existing cable has only two connectors, remove the cable
and replace it with the cable provided by Plextor. Connect the SCSI host adapter to a
connection on either end of the cable. Connect the two peripherals to the other two
connectors (one at the middle connector and one at the end of the cable). Refer to
Chapter 7 of this manual for setting the termination of the devices.
If you have more than one other internal SCSI peripheral (besides your Plextor drive),
you will need to acquire a SCSI ribbon cable with more connectors (one connector for
each internal SCSI device, plus an additional connector for the host adapter----refer to
Chapter 3). Refer to Chapter 7 of this manual for setting the termination of the devices.
CAUTION: It is easy to accidentally plug your SCSI ribbon cable upside down into
both your drive and SCSI interface board. Accordingly, be sure you match
the red stripe along one side of the SCSI cable to pin 1 on the interface
board and pin 1 on the drive (as shown on the next page). Each connector
on the ribbon cable has a ‘‘key’’ in the middle. This key should fit into a
slot in the middle of each connector of the interface board, your 12PleX
CD-ROM drive, and any other SCSI peripherals.
CHAPTER 8 ---- Hardware Installation
Power Supply
from Personal
Computer
DC Power Supply
DC+12V 0.6A
DC+5V 0.3A
SCSI Ribbon Cable
SCSI Host Adapter
Personal Computer
Pin 1
Jumpers
SCSI Interface Connector
Power
Connector
Audio Connector
28
12PLEX OPERATION MANUAL
