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18 Cheetah 9 Installation Guide, Rev. B
Table 2. DC power requirements (Amps)
1
Measured with an average reading DC ammeter. Instanta-
neous +12V current peaks will exceed these values.
2
A –10% tolerance is permissible during initial start of the spin-
dle but must return to ±5% before reaching 10,000 RPM. The
±5% must be maintained after the drive signifies that its
power-up sequence has been completed and that the drive is
able to accept selection by the host initiator.
3
See the +12V current profile in the
Cheetah 9 Product Manual
(publication number 83329170).
4
This condition occurs when the Motor Start option is enabled
and the drive has not yet received a Start Motor command.
5
See “Conducted noise immunity” in the
Cheetah 9 Product
Manual.
The specified voltage tolerance is inclusive of ripple,
noise, and transient response.
ST19101
N, W, WC models WD, DC models
+5V
8, 10
+12V
8
+5V
8
+12V
8
Voltage regulation
5
± 5% ± 5%
2
± 5% ± 5%
2
Max. start current
Peak DC
3, 6, 9
0.93 3.22 0.99 3.22
Delayed motor start
(max)
1, 4
0.79 0.12 0.83 0.12
Peak operating current
Typical DC
1
Maximum (peak)
7
0.89
1.03
1.48
2.7
1.1
—
1.48
2.7