Seagate ST3500071FC ユーザーズマニュアル

NL35 Series FC Product Manual, Rev. D

25

This section provides information relating to the physical and electrical characteristics of the drive.

None.

The voltage and current requirements for a single drive are shown below. Values indicated apply at the drive 
connector. 

[1]

Measured with average reading DC ammeter. Instantaneous +12V current peaks will exceed these val-
ues. Power supply at nominal voltage. Number of drives tested = 6, 35 Degrees C ambient.

[2]

For +12 V, a –10% tolerance is allowed during initial spindle start but must return to ±5% before reaching 
7,200 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.

[3]

See +12V current profile.

[4]

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

Voltage

+5V

+12V [2]

+5V

+12V [2]

Regulation

[5]

±5%

±5% [2]

±5%

±5% [2]

Avg idle current DC                     X

[1] [7]

0.94

0.48

1.00

0.48

Maximum starting current

(peak DC) DC                       3

σ

[3]

1.04

2.08

1.10

2.10

(peak AC) AC                       3

σ

[3]

1.50

3.54

1.56

3.50

Delayed motor start (max) DC    3

σ

0.57

0.03

0.59

0.03

Peak operating current:

     Typical DC                              X

[1] [6]

0.99

0.75

1.05

0.74

     Maximum DC                          3

σ

[1]

1.01

0.77

1.07

0.76

     Maximum (peak) DC               3

σ

1.68

1.90

1.76

1.90