Overland Data LoaderXpress LXL1U11, Installation & User Manual, Page: 31 / 128

LoaderXpress - LXL1U11 2-5
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Impedance match with cable terminators of 132 ohms
• Characteristic impedance between 90 and 132 ohms (required)
•
34-pair twisted-pair
• Each end of twisted-pair ground must be connected to chassis ground
•
When calculating the overall length of the bus, be sure to include the
internal cabling of the module, which is 12 inches (31 cm) for all models.
•
Cables of different impedance should not be used together.
For additional specifications, refer to ANSI X3.131-1994 or later.
NOTE: This equipment has been tested for electromagnetic emissions and immunity using
good quality shielded cables. If you use poor quality or unshielded cables, they may not
comply with national and international rules.
Connecting to the Host
To connect LoaderXpress LXL1U11 to a host computer system:
1) Verify that the following hardware/software are available:
•
The host system has a compatible SCSI controller and the appropriate
driver software installed. (If you have questions about installation for
specific host systems, call your Technical Support representative.)
•
The cables you are using meet the required specifications for type and
length
•
The terminator type matches your system
2) Do one of the following:
• If the LoaderXpress LXL1U11 is the only SCSI device you are connecting
to the host, do the following:
• Connect the cable from the host to one SCSI connector
• Attach the terminator to the remaining SCSI connector
•
If the LoaderXpress LXL1U11 is one of several units you are connecting to
the host, connect them in a daisy-chain by doing the following:
• Connect the cable from the host, to one SCSI connector of
the first SCSI device