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Barracuda 36 Installation Guide, Rev. B 17
Table 2. DC power requirements (Amps), multimode
(SE/LVD)
[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
±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 the +12V current profile in the
Barracuda 36 Product
Manual
(publication number 77767528).
[4] This condition occurs when the Motor Start option is enabled
and the drive has not yet received a Start Motor command.
ST136475LW/LC
Voltage +5V +12V
Regulation [5] ±5% ±5%[2]
Max. operating current
DC [1] 1.4 1.5
Avg. idle current
DCX
[1] 0.75 0.8
Max. starting current
(peak DC) [3]
(peak AC) [3]
1.05
—
2.8
4.2
Delayed motor
start (max) [1][4] 0.65 0.030
Peak operating current
Typical DCX
[1][6]
Maximum DC [1]
Maximum (peak)
1.05
1.4
1.7
1.3
1.5
3.15