Power Supply Requirements - Fujitsu MAN3184MC - Enterprise 18.4 GB Hard Drive Product/Maintenance Manual

4.2

Power Supply Requirements

(1) Allowable input voltage and current
The power supply input voltage measured at the power supply connector pin of the IDD
(receiving end) must satisfy the requirement given in Subsection 2.1.3. (For other requirements,
see Items (4) and (5) below.)
(2) Current waveform (reference)
Figure 4.8 shows the waveform of +12 VDC.
MAN3735 series
Time (2 /div)
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(3) Power on/off sequence
a) The order of the power on/off sequence of +5 VDC and +12 VDC, supplied to the IDD, does
not matter.
b) In a system which uses the terminating resistor power supply signal (TERMPWR) on the SCSI
bus, the requirements for +5 VDC given in Figure 4.9 must be satisfied between the IDD and
at least one of the SCSI devices supplying power to that signal.
4 - 8
MAN3367 series
Time (2 sec/div)
Figure 4.8 Current waveform (+12 VDC)
C141-E128-01EN
MAN3184 series
Time (2 sec/div)