Compaq TL891 - DLT Tape Library User Manual page 88

3-30 TL891 MiniLibrary System User's Guide
Writer: Everett Godaire Project: TL891 MiniLibrary System User's Guide Comments:
Part Number: ER-TL891-UA.A01 File Name: d-ch3 Installation Last Saved On: 3/2/99 2:30 PM
Power Cord
The detachable AC power cord is a standard grounding AC cord which
attaches to an IEC-compatible connector on the rear panel. Connect a cord to
the connector on each module, and connect the other end to a reliably
grounded AC outlet or rack power outlet.
To maintain safety compliance, use a power cord with a suitable rating that is
approved for the country in which the product is used. In the USA, cords must
be UL listed, in Canada, CSA certified, and in Europe use a Harmonized cord
marked <HAR> or a nationally certified cord. Compaq specified power cords
are available as part of the associated TL891 Country Kits (Ordered
separately.)
SCSI Interfaces
MiniLibrary Modules come with a differential Fast/Wide SCSI and one or two
TZ89 drive(s). Fast/Wide SCSI is available as differential, and uses two
parallel female high-density 68-pin D-Series connectors per bus. Fast/Wide
SCSI cables and terminators are secured to the connectors by jackscrews.
NOTE: Compaq strongly recommends that you use differential controllers and high-
quality SCSI cables to ensure the highest performance of your MiniLibrary. Bus errors
caused by excessive length or poor quality cables can significantly degrade performance
and reliability.
In the Base Module, each drive is wired to an independent bus with a pair of
SCSI connectors. Because it can be used in free-standing applications, the
Base Module has a pair of SCSI connectors for that module's library robotics.
The library robotics SCSI interface should not be connected when installed in
a system with an Expansion Unit. The Expansion Unit controls the library
robotics for all of the modules in the system. It has a single SCSI bus, with a
pair of SCSI connectors, to enable a host to control the library robotics.
Each of the drives in the system and the library robotics is a separate SCSI
device and is wired to a separate SCSI bus. Any of the separate buses may be
combined using a SCSI jumper cable, available from Compaq. If any two or
more devices are connected to the same SCSI bus, each must be assigned a
unique SCSI address. For information on assigning SCSI addresses, see the
section entitled Configuration.
Compaq Confidential – Need to Know Required