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Chapter 1 Hardware Installation 35
Step 11 Connect SCSI I/O
SCSI Connectors J44 (SCSI channel 1) and J45 (SCSI channel 2) are 68-pin high density (Wide)
SCSI connectors. J36 (SCSI channel 1) and J37 (SCSI channel 2) are 50-pin low
density (Narrow) SCSI connectors.
All SCSI connectors are located in the same area below the two ISA
connectors.
High Density SCSI Connectors The 68-pin high density connectors are 0.050” pitch unshielded
connectors. The high-density connector pinouts are shown below:
These connectors provide all signals needed to connect to wide SCSI devices.
The connector pinouts are for a single-ended primary bus (P-CABLE) as
specified in SCSI-3 Parallel Interface X3T9.2, Project 885-D, revision 1.2b, date
July 2, 1993.
The cable assemblies that interface with this 68-pin connector are:
•
flat ribbon or twisted pair cable for connecting internal wide SCSI devices,
•
flat ribbon or twisted pair cable for connecting internal and external wide SCSI devices,
•
cable assembly for converting from internal wide SCSI connectors to internal non-wide (Type 2)
connectors,
•
cable assembly for converting from internal wide to internal non-wide SCSI connectors (Type 30), and
•
cable assembly for converting from internal wide to internal non-wide SCSI connectors.
Cont’d