12
Power requirements
The voltage and current requirements for a single drive at cylinder 0 are shown
in Table 3.
Table 3. Single drive voltage and current requirements
Current without Internal
Current with Internal
Terminator
Terminator
Seeking
Contin-
Seeking
Contin-
and
uous
and
uous
Voltage
Idle
Reading
Reading
Idle
Reading Reading
SCSI single-ended interface
+5 V
1.87 A
1.91 A
2.00 A
1.90 A
1.96 A
2.09 A
+12 V
1.57 A
1.92 A
1.56 A
1.57 A
1.90 A
1.56 A
Watts
28.19 W
32.59 W
28.72 W
28.34 W
32.60 W
29.17 W
SCSI differential interface
+5 V
2.32 A
2.63 A
2.75 A
2.45 A
2.77 A
2.85 A
+12 V
1.63 A
1.88 A
1.64 A
1.63 A
1.88 A
1.66 A
Watts
31.21 W
35.71 W
33.40 W
31.81 W
36.41 W
34.17 W
Without Internal
With Internal
Terminator
Terminator
Maximum Current Limits
+5 V
+12 V
+5 V
+12 V
SCSI single-ended interface
Maximum operating current*
2.06 A
3.09 A
2.37 A
3.04 A
Average idle current
1.84 A
1.92 A
1.96 A
1.92 A
Maximum starting current*
2.06 A
3.98 A
2.37 A
3.98 A
Maximum seek current*
1.89 A
2.12 A
2.16 A
3.19 A
SCSI differential interface
Maximum operating current*
2.98 A
2.88 A
3.48 A
3.17 A
Average idle current
2.11 A
1.85 A
2.45 A
1.63 A
Maximum starting current*
2.98 A
3.98 A
3.48 A
4.60 A
Maximum seek current*
2.31 A
2.13 A
3.48 A
3.17 A
*Instant12 V current peaks will exceed these values by up to 0.8 A.
Summary of Contents for Elite ST43400N
Page 1: ...Elite Disc Drive ST43400N ND User s Manual...
Page 47: ...42...
Page 48: ...Maintenance 43...
