Seagate Hawk 2 ST11900N, Руководство по эксплуатации продукта

Страница: 31 / 82

Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. C 23
_________________________________________________________________________________________
Note. All times and currents are typical. See Table 7.2-1 for maximum current requirements.
0 2 4 6 8
Seconds
10 12 14 16 18
.5
1
1.5
.5
1.0
5V
Current
12V
Current
CH2 GND
2.0
CH1 GND
T1 T2
T4 T3
T6 T5
Channel 1
2 s .5 Amps
Channel 2
2 s .5 Amps
T
Power Save
Cut-in
Figure 7.2.2-1. Typical Hawk 2 family drive +5 V +12 V current profile
7.3 Heat/power dissipation
For drives with single ended interface circuits, typical operating power dissipation is 10.8 watts (36.8 BTUs per
hour) of DC power average at nominal voltages. Typical power dissipation under idle conditions is 8.9 watts (30.4
BTUs per hour).
For drives having differential interface circuits, typical operating power dissipation is 12 watts (41 BTUs per hour)
of DC power average at nominal voltages. Typical power dissipation under idle conditions is 10 watts (34.2 BTUs
per hour).
7.4 Environmental limits
Temperature and humidity values experienced by the drive must be such that condensation does not occur on
any drive part. Altitude and atmospheric pressure specifications are referenced to a standard day at 58.7°F
(14.8°C). Maximum Wet Bulb temperature is 82°F (28°C).