Medalist Pro Installation Guide, Rev. B

19

Table 2b. DC power requirements (Amps) for LW/LC

 

 

models

 

 

 

 

 

 

 

 

 

ST39140

ST34520

 

 

 

 

 

LW/LC

LW/LC

Voltage

+5V

+12V

+5V

+12V

Regulation [5]

±5%

±5%[2]

±5%

±5%[2]

Max. operating

 

 

 

 

current DC [1]

0.81

2.4

0.81

2.4

Avg. idle current

 

 

 

 

 

 

[1]

 

 

0.53

0.90

0.53

0.90

DCX

 

 

Max. starting

 

 

 

 

current

 

 

 

 

(peak DC) DC [3]

 

2.5

 

2.5

(peak AC) AC [3]

 

N/A

 

N/A

Delayed motor

 

 

 

 

start (max)

 

 

 

 

DC [1][4]

0.51

0.16

0.51

0.16

Peak operating

 

 

 

 

current

 

 

 

 

 

 

Typical DCX

[1][6]

0.58

1.0

0.58

1.0

Maximum DC [1]

0.81

1.53

0.81

1.37

Notes for Tables 2a and 2b.

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

[2]A –10% droop is permissible during initial start of the spindle but must return to ±5% before reaching 7,200 RPM. The

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Seagate ST39140N/W/WC/LW/LC, ST36530N/W/WC manual DC power requirements Amps for LW/LC, Models ST39140 ST34520