Epson ES-300C User Manual - Page 81

Setting Up the Terminators, Connecting the Scanner to a Macintosh

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Using the SCSI Interface 0I. CAUTION: l Do not set the SCSI ID (the rotary switch) to 8 or 9. These numbers are not available for SCSI connection. l Do not set the ID number to an ID that is already assigned to another device. If two or more devices have the same ID number, the computer, the scanner, and/or the other device will not function properly. Setting Up the Terminators For SCSI devices to communicate properly with each other, the SCSI interface requires special resistor packs known as terminators. These terminators are needed to reduce the echo, standing waves, and interference along the SCSI interface. You must be aware of the following important points about terminators before you connect your scanner to the SCSI interface. You must have only two terminators on a SCSI daisy chain: one on the first and one on the last SCSI device. Terminators may be internal or external. Internal terminators are built into the SCSI device. External terminators are purchased separately and are installed on the SCSI device. If your Macintosh has a hard disk, the hard disk is the first SCSI device on the daisy chain. A Macintosh with an internal hard disk always has an internal terminator. A Macintosh with an external hard disk may have either an internal or external terminator. The scanner has an internal terminator so it must be the last SCSI device on the daisy chain. C-4 Connecting the Scanner to a Macintosh

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Using the SCSI Interface
0
I
CAUTION:
.
l
Do not set the SCSI ID (the rotary switch) to 8 or 9.
These numbers are not available for SCSI connection.
l
Do not set the ID number to an ID that is already
assigned to another device. If two or more devices have
the same ID number, the computer, the scanner, and/or
the other device will not function properly.
Setting Up the Terminators
For SCSI devices to communicate properly with each other, the SCSI
interface requires special resistor packs known as terminators. These
terminators are needed to reduce the echo, standing waves, and
interference along the SCSI interface.
You must be aware of the following important points about
terminators before you connect your scanner to the SCSI interface.
You must have only two terminators on a SCSI daisy chain: one
on the first and one on the last SCSI device.
Terminators may be internal or external. Internal terminators are
built into the SCSI device. External terminators are purchased
separately and are installed on the SCSI device.
If your Macintosh has a hard disk, the hard disk is the first SCSI
device on the daisy chain. A Macintosh with an internal hard
disk always has an internal terminator. A Macintosh with an
external hard disk may have either an internal or external
terminator.
The scanner has an internal terminator so it must be the last
SCSI device on the daisy chain.
C-4
Connecting the Scanner to a Macintosh