Electrical Requirements; Psu Requirements; Internal And Rack-Mounted Drives; Power Consumption - HP Ultrium Drive Technical Reference Manual

3 Electrical requirements

PSU requirements

Internal and rack-mounted drives

The drives are specified to operate at 5V±5% and 12V±10%. Any PSU used to power the
drive must be capable of providing 5V nominal (when the drive pulls 5A on the 5V rail) and
12V nominal (when the drive pulls 2A on the 12V rail). HP recommends a 10% buffer when
selecting a power supply source capable of delivering the amperage and power required.
Specification
Maximum voltage
Minimum voltage
Maximum steady-state current
Maximum transient current
Maximum steady-state power
Maximum transient power
Maximum noise/ripple
* The current values are calculated based on constant power and minimum power supply voltage.

Power consumption

Power Requirements
5V DC
12V DC
Activity
Idle
Load
Write
SCSI Drives
5V
5.25V
4.75V
4.75*A
4.75*A
22.5W
22.5W
150 mVpp 150 mVpp
Internal Drives
<40W
3.0A typical (4.5A max.)
0.8A typical (2.0A max.)
SCSI Drives
Average Peak
15.8W 15.8W
18.1W 32.3W
30.2W 35.3W
FC Drives
12V 5V
13.2V 5.25V
10.8V 4.75V
1.0A 4.75*A
2.0A 4.75*A
12W 17.5W
24W 22.5W
150 mVpp 150 mVpp
External Drives
100–240 VAC 50/60 Hz 0.8A max.
FC Drives
Average
TBD
TBD
TBD
12V
13.2V
10.8V
1.0A
2.0A
12
W
24W
13