Nikon LS-30 Bedienungsanleitung PDF herunterladen (Seite 22)

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Setup: Connecting the SCSI Cable

SCSI devices are connected to the computer in a “daisy chain.”

Up to eight devices, including the computer and any internal

SCSI devices such as hard drives and CD-ROM drives, can be

connected in a SCSI chain. The first and last devices in the

chain must be terminated, i.e., fitted with special circuitry to

reduce noise, making the connection more reliable. If the

LS-30

is the last device in the chain, it can be terminated using the

termination switch on the rear of the scanner. Except in the

case of some laptop computers requiring external terminators,

the other end of the chain will be terminated inside the com-

puter, either at the SCSI adapter or at an internal drive. In the

case of IBM PC/AT computers with internal SCSI devices, it may

be necessary to remove termination from the SCSI adapter

board before connecting external devices.

To connect the scanner to the SCSI chain, a SCSI cable with a

male half-pitch 50-pin connector is required. The other end of

the cable must match the connector on the devices to which

the scanner is to be connected. For direct connection to most

Macintosh computers, a 25-pin D-sub connector will be re-

quired (Macintosh laptop computers use a different type of

connector). SCSI boards for IBM PC/AT computers will usually

be provided with a 25-pin D-sub connector, a 50-pin Centronics

connector, or a half-pitch 50-pin connector with the pins ar-

ranged in two separate rows or attached to a central “finger.” If

the correct type of cable is not available, an adapter can be

attached to one or both ends of the cable. To prevent interfer-

ence, SCSI cabling should be of a high-impedance type and be

as short as possible. The total length of cabling in a SCSI chain

must not exceed six meters (twenty feet), but be aware that

the reliability of the SCSI interface will drop as the length of the

cable increases.

A SCSI cable is provided with scanners sold in the United States

and Canada. If your scanner was purchased in another region,

before connecting the SCSI cable you should attach the ferrite

core provided with your scanner (the cable provided to cus-

tomers in the United States and Canada does not require a

core). Place the SCSI cable in the center of the open core and

close the core tightly. The core should be attached as far as

possible from the scanner; i.e., as close as possible to the other

device to which the cable is attached. Attach the plastic tie on

the scanner side of the core to prevent the core from sliding

out of position.

2. Place tie around

cable and pull tight

1. Close and latch core

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