Datasheet

Medalist Pro Product Manual, Rev. D 19
6.0 Physical/electrical specifications
This section provides information relating to the physical and electrical characteristics of Medalist Pro drives.
6.1 AC power requirements
None.
6.2 DC power requirements
The voltage and current requirements for a single drive are shown in the following table. Values indicated apply
at the drive power connector. The single ended power requirements includes the internal disc drive SCSI I/O
termination. The table shows current values in Amperes.
Table 2a: DC power requirements for N/W/WC models
Table 2b: DC power requirements for LW/LC models
Notes for Tables 2a and 2b.
[1] Measured with average reading DC ammeter. Instantaneous +12 V current peaks will exceed these val-
ues.
[2] A –10% droop is permissible during initial start of spindle, and must return to ±5% before 7,200 rpm is
reached. The ±5% must be maintained after the drive signifies that its power-up sequence has been com-
Notes
ST39140 ST36530 ST34520
N/W/WC
Single-ended
N/W/WC
Single-ended
N/W/WC
Single-ended
Voltage +5 V +12 V +5 V +12 V +5 V +12 V
Regulation [5] ±5% ±5%[2] ±5% ±5%[2] ±5% ±5%[2]
Maximum operating current DC [1] 0.55 2.4 0.55 2.4 0.55 2.4
Average idle current DCX
[1] 0.51 0.81 0.51 0.81 0.51 0.81
Maximum starting current
(peak DC) DC
(peak AC) AC
[3]
[3]
2.5 2.5 2.5
Delayed motor start (max) DC [1][4] 0.51 0.13 0.51 0.13 0.51 0.13
Peak operating current
Typical DC X
Maximum DC
Maximum (Peak)
[1][6]
[1]
0.51
0.55
0.96
1.17
0.51
0.55
0.96
1.17
0.51
0.55
0.96
1.17
Notes
ST39140 ST34520
LW/LC
LV D
LW/LC
LV D
Voltage +5 V +12 V +5 V +12 V
Regulation [5] ±5% ±5%[2] ±5% ±5%[2]
Maximum operating current DC [1] 0.81 2.4 0.81 2.4
Average idle current DCX
[1] 0.53 0.90 0.53 0.90
Maximum starting current
(peak DC) DC
(peak AC) AC
[3]
[3]
2.5 2.5
Delayed motor start (max) DC [1][4] 0.51 0.16 0.51 0.16
Peak operating current
Typical DC X
Maximum DC
Maximum (Peak)
[1][6]
[1]
0.58
0.81
1.0
1.53
0.58
0.81
1.0
1.37