16 ST11950 and ST12550 Installation Guide, Rev. D
DC power requirements |
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for ST11950N/ND and ST12550N/ND drives |
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| Differential | |||
| +5V | +12V | +5V | +12V |
Voltage regulation5 | ± 5% | ± 5%2 | ± 5% | ± 5%2 |
Maximum operating current1 |
| Amps |
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1.1 | 0.95 | 1.5 | 0.95 | |
Average idle current1, 12 | 0.76 | 0.83 | 0.79 | 0.83 |
Maximum starting current |
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Peak DC3, 6 | 1.0 | 2.18 | 1.1 | 2.18 |
Peak AC3 | − | 3.1 | − | 3.1 |
Delayed motor start (max)1, 4 | 1.06 | 0.19 | 1.1 | 0.2 |
Peak operating current |
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Typ DC1, 10 | 1.07 | 0.91 | 1.47 | 0.91 |
Max DC1 | 1.1 | 0.95 | 1.5 | 0.95 |
Max (peak) | 1.15 | 1.87 | 1.8 | 1.86 |
Track following (DC) |
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at OD1 | 1.0 | 0.84 | 1.1 | 0.84 |
at ID1 | 1.0 | 0.9 | 1.1 | 0.9 |
Read track |
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OD DC1, 14 | 1.1 | 0.85 | 1.6 | 0.85 |
AC | 1.2 | 1.2 | 1.8 | 1.2 |
Seeking |
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Typical DC1, 13 | 1.0 | 1.2 | 1.1 | 1.2 |
Maximum DC1 | 1.1 | 1.2 | 1.2 | 1.2 |
Maximum (peak) AC | 1.2 | 1.8 | 1.7 | 1.8 |
