Terminators - Overland Data DLT LibraryXpress Series Service Manual

•
The maximum cable length for a single-ended Fast SCSI bus is 9.8 feet (3 m)*;
•
The maximum cable length for a differential Fast SCSI bus is 82 ft. (25 m)*;
•
Cables of different impedances should not be used together.
* When calculating the overall length of the bus, be sure to include the internal cabling of the
module, which is as follows:
Base Module:
SCSI-2, Fast SCSI-2 (2000XT and 4000 Drives)
DLT1
DLT2
Fast/Wide (7000 Drives)
DLT1
DLT2
Global Control Module:
Additional specifications to assure the highest SCSI performance can be found in ANSI
X3.131-1994 or later.
Note: This equipment has been tested for electromagnetic emissions and immunity using good
quality shielded cables. The use of unshielded cables, poor quality cables or other variances
from good practice may result in non-compliance with national and international rules.

Terminators

A terminator must be installed on the device if the device is to be used at either end of a SCSI
bus, such as the first or last device along a daisy-chain, or as a single SCSI peripheral. The
appropriate type and quantity of terminator is shipped with your module. They are packaged
in the accessory bag that arrives with the module.
Notes: 1) For single-ended busses, active terminators are strongly recommended. 2) It is
important to use only differential terminators on a differential SCSI bus.
32
20 inches (51 cm)
27 inches (67 cm)
14 inches (36 cm)
23 inches (57 cm)
32 inches (81 cm)
Chapter 2 - Installation