Connecting Internal Scsi Devices; 50-Pin-To-68-Pin Converter - Adaptec AHA-3940 User Manual

AHA-3940/3940W User's Guide

Connecting Internal SCSI Devices

Read the device documentation if you need to physically install a
SCSI device inside your computer before attaching the cables.
To connect internal SCSI devices to an AHA-3940/3940W host
adapter, you need the following:
A 50-connector SCSI ribbon cable with a 50-pin connector for
the AHA-3940 host adapter. (Or two cables if you are using
both internal SCSI connectors.)
A 68-connector SCSI ribbon cable with a 68-pin connector for
the AHA-3940W host adapter. (Or two cables if you are using
both internal SCSI connectors.)
There must be additional connectors in the middle of the cable if you
are attaching more than one internal device. Make sure your cable
has enough connectors. To connect three or more internal SCSI
devices to a SCSI bus, make a SCSI ribbon cable that has enough
connectors for all the SCSI devices.
You can connect both 8-bit and 16-bit SCSI devices to the
AHA-3940W host adapter. To attach the 8-bit devices you need a
50-pin-to-68-pin converter, as shown in Figure 2-4.
Figure 2-4. 50-pin-to-68-pin Converter
You can purchase these converters from your local computer supply
store or from Adaptec at the phone number listed on page iii.
Note:
The following diagrams show the 50-pin internal con-
nector used with AHA-3940 host adapters. AHA-3940W
host adapters use 68-pin high-density connectors.
2-8
A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
A A
AHA-3940/3940W User's Guide
A
A A
Stock Number: 510600-00, Rev. A
A A
A A Print Spec Number: 492707-00
A A
Current Date: 8/24/94
AAAA AAAA A AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA
AAAA
ECN Date: 08/30/94
AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA
A
A A
A A
Page: 2-8 A A
A
A A
A A
AAAA AAAA AAAA A A A A