Seagate Cheetah 9LP Series, Product Manual

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52 Cheetah 9LP Product Manual, Rev. C
Recommended mating 80-position PCBA mount connectors:
Right-angle to PCBA connectors
Seagate P/N: 77678559 Amp US P/N: 2-557101-1 Amp Japan P/N: 5-175474-9
For additional information call Amp FAX service at 1-800-522-6752.
[1] Closed end type 68-pin connector used. Terminators enabled.
[2] Open end type (in-line application) connector used.
[3] Host need not be on the end of the daisy-chain. Another device can be on the end with the terminator, the
host having no terminator.
[4] Total interface cable length must not exceed that specified in ANSI document X3T10/1142D (including
host adapter/initiator). The cable length restriction limits the total number of devices allowed.
[5] SCSI ID7 has highest arbitration priority, then ID15 to ID8 (ID 8 very lowest).
[6] Last drive on the daisy chain.
[7] Open-end type 68-pin connector used. If end device, use external terminator and closed-end type 68-pin
connector.
Figure 14. SCSI daisy chain interface cabling for LW drives
Straight-in connector Hot plug version (with ground guide-pin)
Seagate P/N: 77678703
Amp US P/N:
or 2-557103-1
94-0680-02-1 787311-1 with polarization
Amp US P/N:
or 2-557103-2
94-0680-02-2 787311-2 without polarization
Amp Japan P/N: 5-175475-9
Host Adapter
PCB
Pin 1
(check your
adapter for Pin 1 location)
[6]
SCSI ID 1
SCSI ID 0
SCSI ID 7 [5]
2 through X
SCSI devices [4]
[1]
[3]
[2]
Terminator
[7]
“LW” Model
Drive
[2]