The scsi chain, Setting up the scsi chain - ls-10e, Setting up the scsi chain - ls-loe – Nikon LS-10 Installation Guide for Macintosh User Manual
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Chapter 3
The SCSI Interface
Never remove a cable from the connector by pulling on the cable. If you cannot
remove the cable by hand, use a small screwdriver to pry each of the sides out, a
litde at a time. Use caution at all times.
4. Make sure that Pin 1 of the cable connector mates with Pin 1 of the computer
connector. Never guess.
5.
Never
plug or unplug a SCSI connector while the computer is powered on. This
can result in damage to the SCSI controller.
The SCSI Chain
The SCSI chain, as you learned earlier, is the electronic data and control bus that
connects two or more SCSI devices. The SCSI bus is the ‘data highway’ and the SCSI
devices linked together forming the SCSI chain represent ‘stops’ on the highway. As
mentioned at the start of this chapter, the SCSI chain can accommodate up to seven
devices on the SCSI bus.
On any SCSI bus, there must be at least one
SCSI host
and one
SCSI target device.
Coolscan is always a SCSI target device. This is the standard configuration for SCSI-
based scanners. In fact, most devices connected to computers will be SCSI target
devices. Typically, the Macintosh will always be the SCSI host.
In any case, the SCSI ID number of each device must be unique.
If you are installing an LS-10, please proceed to the section “Setting Up the
SCSI Chain-LS-10.”
Setting Up the SCSI Chain - LS-10E
The LS-lOE can reside at any position in the SCSI chain. The two 50-pin con
nectors on the rear of Coolscan are both used for this purpose. There are essentially two
possible SCSI chain configurations, the
two SCSI devices
configuration, and the
multiple
SCSI devices
configuration.
Unlike other Macintosh computers, the PowerBook does
not
supply SCSI termina
tion power. To use Coolscan with a PowerBook, the SCSI Termination Power
Switch on the rear of the LS-lOE (see Figure 2.2) must set to the ON position.
This configuration will require termination at both ends of the SCSI chain. For
further information, refer to the
Macintosh User’s Guide for Macintosh PowerBook
Computers.
Nikon
Coolscan Installation Guide for Macintosh
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