Seagate ST34501WD, ST34501DC manual DC power requirements Amps ST34501 WC models WD, DC models

18	Cheetah 4LP Installation Guide, Rev. B
Table 2. DC power requirements (Amps)
	ST34501
	N, W, WC models		WD, DC models
	+5V8, 10	+12V8	+5V8	+12V8
Voltage regulation5	± 5%	± 5%2	± 5%	± 5%2
Max. start current	0.88	2.2	0.89	2.2
Peak DC 3, 6, 9
Delayed motor start	0.81	0.08	0.72	0.08
(max)1, 4
Peak operating current	0.85	0.89	1.05	0.89
Typical DC 1
Maximum DC 1	0.9	0.94	1.09	0.94
Maximum (peak) AC 7	1.0	1.98	—	1.98

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 10,000 RPM. 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 Cheetah 4LP Product Man- ual (publication number 83329120).

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