Seagate Elite ST43400N, User Manual

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Installation 13
AC power requirements for the optional Seagate power supply are listed in
Table 4 below. Conversion to the different line voltages is explained in the
installation procedures.
Table 4. Power supply AC power requirements
Nominal Values
Specifications 100–120 VAC 208–240 VAC
Voltage range 85 to 132 V 175 to 264 V
Nominal line frequency 50/60 Hz 50/60 Hz
Frequency range 48.0 to 62.0 Hz 48.0 to 62.0 Hz
Phase requirements Single phase Single phase
Power consumed* 71.5 W 69.5 W
Line current* 0.90 A 0.50 A
Power factor* 0.55 0.47
*Measured at nominal values when discs are rotating and carriage is track-following.
Grounding requirements
A safety ground must be provided by the site AC power system. The green wire
(or green wire with yellow stripe) in the AC power cord provides the safety ground
connection between the power supply and the site AC power system. The site
AC power system must provide the safety ground to earth ground connection.
All site AC power connection points, including convenience outlets for test
equipment, must be maintained at the same safety ground potential.
Interface requirements
An important part of site preparation is planning the layout and routing of I/O
cables. All drives and other SCSI devices are connected together and to the
host with an I/O cable. The SCSI bus can have up to eight devices attached to
it as shown in Figure 6. The I/O cabling scheme used is called a daisychain.
Each end of the SCSI bus must be terminated.