Adaptec APA-358 Installationsanleitung PDF herunterladen (Seite 5)

APA-358A MiniSCSI-2 Installation Guide

Part Number: 510809-00, Rev. A

Print Spec Number: 493477-00

Current Date: 4/11/95 ECN Date: 4/1195

The device at the other end of the SCSI bus will be an

external SCSI device, such as an external hard disk

drive. External SCSI devices are normally terminated

by installing a terminator in the unused SCSI con-

nector on the SCSI device (see the figure on page 5

for an example) or by setting jumpers or switches.

See your device documentation for details.

Termination Power

The SCSI bus must have termination power, a specific

voltage (5 volts) required by the terminators. Termi-

nation power may be available from one of the SCSI

devices attached to the MiniSCSI-2. To determine

whether a device provides termination power, check

the device documentation. You can also determine

this by connecting the device to the MiniSCSI-2, as

described in the next section, and checking the LED

on the MiniSCSI-2. If the LED lights after you turn on

the SCSI device, the device is providing termination

power (see step 10 on page 6).

The SCSI device that provides termination power

may be anywhere on the SCSI bus. Also, more than

one device can provide termination power—this

does not cause problems on the SCSI bus.

If none of the SCSI devices provides termination

power, you must obtain an AC adapter. You can

order the AC adapter from Adaptec at 800-442-7274.

Installing the MiniSCSI-2

Installing the MiniSCSI-2 involves plugging the

MiniSCSI-2 into the parallel port, then connecting the

MiniSCSI-2 to your SCSI devices and printer. Follow

the steps in this section, referring to the figure on

page 3 for connector locations.

WARNING: Turn OFF the computer, printer,

and SCSI devices when connecting or dis-

connecting the MiniSCSI-2.

1 Disconnect anything connected to the parallel

port you intend to use for the MiniSCSI-2. You

may use either LPT1, LPT2, or LPT3—the

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Adaptec APA-358 Installationsanleitung Seite 5