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Elite 23 Installation Guide, Rev. A
Terminating the drive
ST423451W drives are terminated with permanently mounted IC
active terminators. If you install one of these drives and it is not
on the end of the SCSI bus, disable the terminators by removing
the TE jumper from pins 19 and 20 of connector J4A. If you
install the drive on the end of the SCSI bus, enable termination
by installing a jumper on pins 19 and 20 of connector J4A (see
Figure 12).
Note. Use active (ANSI SCSI-2 Alternative 2) terminators when
terminating the bus.
ST423451WD drives do not have internal terminators or any
other way of adding internal termination to the drive. You must
provide external differential termination to these drives when ter-
mination is required.
Terminator Enabled (TE)
Terminator Disabled (TE)
Figure 12.
Pin 1
J4A
Pin 1
Terminating the drive (ST423451W shown)
W/WD drives
J4A
J01
Pin 1
Pin 19
39
J4B
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