Fujitsu MAU3036NC/NP Manual de usuario descargar pdf (Pagina 58)

4-8 C141-E205

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 spin-up current waveform of +12 VDC.

MAU3147NC/NP MAU3073NC/NP

MAU3036NC/NP

Current (500mA/div)

Time (2 sec/div)

Current (500mA/div)

Time (2 sec/div)

Current (500mA/div)

Time (2 sec/div)

Figure 4.8 Spin-up current waveform (+12 VDC)

(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.

Figure 4.9 Power on/off sequence (1)

1 2 ... 53 54 55 56 57 58 59 60 61 62 63 ... 129 130

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Fujitsu MAU3036NC/NP Manual de usuario Pagina 58