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Barracuda 1 and 2 Product Manual, Rev. C
7.0
7.1
7.2
Physical/electrical specifications
This section provides information relating to the physical and electrical
characteristics of Barracuda 1 and 2 drives.
AC power requirements
None.
DC power requirements
The voltage and current requirements for a single drive are shown in
Tables 1 and 2 (table notes follow Table 2). Values indicated apply at the
drive's power connector.
Table 1. DC power requirements
for ST11950N/ND and ST12550N/ND drives
[5]
Voltage regulation
Max operating current DC 3
Avg idle current OD DC X
Max start current
(peak) DC 3
(peak) AC 3
Delay motor start (max)
DC 3
Peak operating current
Typical DC X
Maximum DC 3
Maximum (peak) AC 3
Track following at
OD DC X
ID DC X
Read track
OD DC 3
AC 3
Seeking
Typical DC X
Maximum DC 3
Maximum (peak) AC 3
ST11950N &
ST12550N
[8]
5V
12V
[2]
Notes
±5%
±5%
Amps
[1]
1.1
0.95
[1] [9]
1.0
0.84
[3] [6]
1.0
2.18
[3]
–
3.1
[1] [4]
1.06
0.19
[1] [7]
1.07
0.91
[1]
1.1
0.95
1.15
1.87
[1]
1.0
0.84
[1]
1.0
0.9
[1] [11]
1.1
0.85
1.2
1.2
[1] [10]
1.0
1.2
[1]
1.1
1.2
1.2
1.8
31
ST11950ND &
ST12550ND
[8]
5V
12V
[2]
±5%
±5%
1.5
0.95
1.1
0.84
1.1
2.18
–
3.1
1.1
0.2
1.47
0.91
1.5
0.95
1.8
1.86
1.1
0.84
1.1
0.9
1.6
0.85
1.8
1.2
1.1
1.2
1.2
1.2
1.7
1.8
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