Seagate ST318405LW/LC, ST39205LW/LC, ST336705LW/LC manual Right-angle to Pcba connectors, Scsi ID

62 Cheetah 36XL Product Manual, Rev. E

Recommended mating 80-position PCBA mount connectors:

Straight-in connector		Hot plug version (with ground guide-pin)
Seagate P/N:	77678703
Amp US P/N:	2-557103-1	787311-1	with polarization
or	94-0680-02-1
Amp US P/N:	2-557103-2	787311-2	without polarization
or	94-0680-02-2

Amp Japan P/N: 5-175475-9
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.

“LW” Model

Drive

[6]

SCSI ID 1

SCSI ID 0

Note. Do not mix drives operating single-ended with drives operating differential on the daisy chain.

Terminator

[1]

2 through X

SCSI devices [4]

	Pin 1
	(check your
	adapter for Pin 1 location)
[2]	SCSI ID 7 [5]
	[1]
	Host Adapter
	PCBA
	[2]
	[3]

[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 X3T10/1302D (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 21. SCSI daisy chain interface cabling for LW drives