Heat/Power Dissipation; Environmental Limits - Seagate HAWK 4 Series Product Manual

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Note. All times and currents are typical. See Table 7.2-1 for maximum current requirements.
1.0
5V
.5
Current
(amps)
CH1 GND
T
2.0
1.5
12V
Current
1
(amps)
.5
CH2 GND
0
Figure 7.2.2-1. Typical Hawk 4 family (Wide) drive +5 V +12 V current profile
7.3

Heat/power dissipation

For drives with single ended interface circuits, typical operating power dissipation is 12 watts (41.1 BTUs per
hour) of DC power average at nominal voltages. Typical power dissipation under idle conditions is 9 watts
(30.8 BTUs per hour).
For drives having differential interface circuits, typical operating power dissipation is 13 watts (44.6 BTUs per
hour) of DC power average at nominal voltages. Typical power dissipation under idle conditions is 9.5 watts
(32.5 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).
Product Manual - Hawk 4 Family (Wide) SCSI-2 (Volume 1), Rev. E
T1 T2
2 4 6 8
Seconds
T3 T4
T5
10 12 14 16
Power Save
Cut-in
T6
Channel 1
2 s .5 Amps
Channel 2
2 s .5 Amps
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