Seagate ST423451N/W/WD manual Elite 23 Installation Guide, Rev. a

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14	Elite 23 Installation Guide, Rev. A
Table 2: DC power requirements
	Single-ended		Differential
	+5V8,10 +12V8		+5V8,10 +12V8
Voltage regulation5	± 5%	± 5%2	± 5%	± 5%2
		Amps
Maximum starting current
Peak DC 3, 6, 9	1.0	4.8	1.05	4.8
Delayed motor start (max)1, 4	.85	.1	.85	.1
Peak operating current
Typical DC 1	.98	1.6	1.2	1.6
Maximum (peak)7	1.1	2.8	1.95	2.8

1Measured with an average reading DC ammeter. Instanta- neous +12V current peaks will exceed these values.

2A –10% tolerance is permissible during initial start of the spin- dle but must return to ±5% before reaching 5400 r/min. The ±5% must be maintained after the drive signifies that its power-up sequence has been completed and that the drive is able to accept selection by the host initiator.

3See the +12V current profile in the Elite 23 Product Manual (publication number 83329140).

4This condition occurs when the Motor Start option is enabled and the drive has not yet received a Start Motor command.

5See “Conducted noise immunity” in the Elite 23 Product Man- ual. The specified voltage tolerance is inclusive of ripple, noise, and transient response.

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Contents Elite Disc Drive ST423451N/W/WD Contents Preface Electrostatic discharge protectionImportant safety information and precautions Page Wichtige Sicherheitshinweise Page European Union Compliance Page SeaFONE at 1-800-SEAGATE Seagate Technology Online servicesSeaNET BBS Location Modem number SeaBOARDSeagate Technology Forum on CompuServe Seagate Technology FAX services SeaFAXLocation Telephone number Seagate technical support FAXSeagate technical support line SeaTDDGeneral description Drive characteristics Elite 23 Installation Guide, Rev. a Dimensions of the drive Drive models General informationScsi ID jumpers Drive termination Terminator power Circuits and data path widthsCable characteristics for single-ended circuits Fifty-pin I/O connection to drive Multiple drive connection to host adapter Multiple-drive connection to host adapter Providing adequate cooling Kühlung des Systems Suggested air flow Abbildung 4. Empfohlener Luftstromverlauf Mounting the drive and connecting cables Installation des Laufwerkes und Anschluß der KabelElite 23 Installation Guide, Rev. a Pin Power Pin GleichstromHinweis Page Mounting configuration dimensions Formatting the drive Quick reference desktop system notesSetting the Scsi ID jumpers Setting the Scsi ID on N modelsTerminating the drive Terminating the driveSetting terminator power jumpers on N models Other applicable jumper options Additional jumper optionsWD drives Terminating the drive ST423451W shown Setting terminator power jumpers on W models Other option jumpers are available as illustrated below Active, Ready, and Fault indicators LED indicator connections for all drive modelsPage Page