American Megatrends MAN-758 manual Connect SCSI I/O

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:

∙flatribbonortwistedpaircableforconnectinginternalwideSCSIdevices,

∙flatribbonortwistedpaircableforconnectinginternalandexternalwideSCSIdevices,

∙cableassemblyforconvertingfrominternalwideSCSIconnectorstointernalnon-wide(Type2) connectors,

∙cableassemblyforconvertingfrominternalwidetointernalnon-wideSCSIconnectors(Type30),and

∙cableassemblyforconvertingfrominternalwidetointernalnon-wideSCSIconnectors.

Cont’d

Chapter 1 Hardware Installation 35