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

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.