Scsi Bus Length Constraints; Ultra Narrow Single-Ended Scsi Bus Length - HP Visualize J5000 Owner's Manual

NOTE
SCSI Connections

SCSI Bus Length Constraints

SCSI Bus Length Constraints
This section discusses SCSI bus length constraints for the Ultra Narrow
Single-Ended SCSI bus and the Ultra2 Wide Low-Voltage Differential
SCSI bus.

Ultra Narrow Single-Ended SCSI Bus Length

The maximum cable length for an Ultra Narrow Single-Ended SCSI bus
is 3 meters. The HP V
meters of this maximum cable length.
When calculating the total Ultra Narrow Single-Ended SCSI cable/bus/
trace length used externally, remember to account for cables connecting
external devices together as well as the bus length internal to those
devices.
There are two total cable length specifications that apply to the Ultra
Narrow Single-Ended SCSI bus on your computer. Note that these
specifications are based on the requirement that the SCSI device being
connected to the NSE SCSI bus does not exceed the maximum
capacitance of 25 picofarads (pF). Please check with the vendor of your
SCSI device if you are not sure of your devices maximum capacitance.
Here are the total cable length specifications:
• For a total of one to four devices being connected to the NSE SCSI bus
the total length of cable used should not exceed 3.0 meters.
• For a total of five to eight devices being connected to the NSE SCSI
bus the total length of cable used should not exceed 1.5 meters.
Note that the computer is counted as one of the total devices, and the
internal length of its cabling is 0.15 meters. This length needs to be
considered in your total cable length determination.
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J5 Class and J7 Class system uses 0.15
ISUALIZE
Chapter 7