Physical Interface - Seagate ST11200N Product Manual

Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
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11.6

Physical interface

Figure 11.6-1a shows the locations of the physical interface components for the "N" and "ND" model drives.
Shown are the locations of the D.C. power connector, the SCSI interface connector, the I/O line terminators,
and the drive select and option select header.
Optional versions of this drive, the models ST11200NC and ST1980NC have an 80 pin connector that has
the SCSI I/O signals, DC power and some option select functions all together in the 80 pin connector. See
Figure 11.6.3-1b and Table 11.6.3-1c.
Details of the physical, electrical and logical characteristics are given in paragraphs following, while the
SCSI operational aspects of Seagate drive interfaces are given in the Seagate SCSI Interface Product
Manual, P/N 77738479.
Connector
Figure 11.6-1a. "N" and "ND" drives model physical interface (50 pin SCSI I/O connector)
Figure 11.6-1b. "NC" model drive physical interface (80 pin I/O and DC power connector)
Pin 1
Pin 1
J1
SCSI I/O
J5
Pin 1 End
J4
80 Pin
SCSI I/O and
DC Power
Connector
Pin 1
Pin 1 End
Pin Power
1 +12V
2 +12V ret
3 + 5V ret
4 + 5V
J1
4 3 2 1
DC Power
Connector
I/O Terminators
J2
J6
I/O Terminators
J4
J2
J6
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