User`s guide

MegaRUM II PCI Motherboard User’s Guide

Step 10 Connect SCSI I/O

SCSI Connectors J18 (SCSI channel 1) and J17 (SCSI channel 2) are 68-

pin high density (Wide) SCSI 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