User`s guide

2-49
Installing the PowerDomain 2940UW/3940UW and Connecting SCSI Devices
PowerDomain 2940UW/3940UW User’s Guide
Stock Number: 510864-00, Rev. B Page: 2-49
Print Spec Number: 493742-00
Current Date: 2/20/96 ECN Date: 2/27/96
Setting SCSI Device Termination
Termination on some SCSI devices is controlled by a device (such
as a switch) located close to the SCSI connector. On other SCSI
devices, you must physically remove or install built-in
terminators. Refer to the SCSI device documentation to determine
how to enable or disable termination on your particular SCSI
device(s), or contact a qualified technician to perform the
procedure for you.
Setting Accelerator Card Termination
Use the configuration control utility to change the termination of
the PowerDomain 2940UW/3940UW accelerator card. (See Setting
Termination on page 3-7.)
Termination Examples
The following sections show the most commonly used termination
configurations.
PowerDomain 3940UW with 68-pin External Devices
When only the PowerDomain 3940UW external connector for
channel A (and/or B) has SCSI devices connected to it, you must
enable termination on the last SCSI device. You must also enable
termination on the PowerDomain 3940UW. (See Setting
Termination on page 3-7 for instructions.)
The following illustration shows three external devices connected
by three external cables. One external cable is also attached to one
of the condensed 68-pin external connectors.