Epson ES-1200C - Manual (Page 21)

SCSI
For some computers, you first install a SCSI board in your
computer. Then follow the directions below to connect your
scanner and computer. All Macintoshes have SCSI ports; you
do not need to install a SCSI board in the computer. Follow the
directions below to connect the scanner to your Macintosh
SCSI connections
The SCSI interface allows you to connect up to eight devices,
including the computer, in what is called a daisy-chain
arrangement. A daisy chain is made up of a computer and one
or more SCSI devices. Only the first SCSI device is connected to
the computer; each of the other devices is connected to the
previous device.
Each device has a SCSI ID number: the computer is usually
number 7, and each of the other devices must have a different
number between 0 and 6. Also, the first device and the last
device in the chain (not including the computer) must have a
terminator, and no other device can have a terminator. The
SCSI on the scanner has two 50-pin connectors.
If you connect the scanner directly to the computer, you need
a SCSI cable with a 25-pin connector on one end (for the
computer) and a 50-pin connector on the other end (for the
scanner). If you connect the scanner to another SCSI device, use
a SCSI cable with 50-pin connectors on both ends.
1-8 Setting Up the Scanner