NEC Express5800/140Rc-4, User Manual

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General Description 2-15
Power Supplies
The system contains two auto-sensing 430 watt power supplies at an operating frequency of 50/60
Hz.
A third optional power supply may be added as part of a fault-tolerant hot-swap design. With three
power supplies installed, in the unlikely event of a power supply failure, the load is transferred to
the remaining power supply without interruption to normal operation. In this case the faulty power
supply can be replaced without powering down the system.
NOTE: The power supplies are not hot-swappable unless there are
three supplies installed.
The power supplies are designed to comply with existing emission standards and provide sufficient
power for a fully loaded system configuration.
Peripheral Bays
The system supports a variety of standard PC AT-compatible peripheral devices. The chassis
includes these peripheral bays:
„
Media bay for installing the standard 3.5-inch floppy disk drive (supports 720KB and
1.44MB floppy disk media) and the standard CD-ROM drive.
„
A 5.25-inch device bay for installing half-height 5.25-inch peripheral devices such as an
optional tape drives.
„
The SCSI hard disk drive bay for installing up to five SCSI hard disk drives.
„
The SCSI disk drives can be easily installed or removed. The drive carrier allows you to
access to disk drives from the front of the system. If disk drives are provided with RAID
configuration within the system, a disk drive can be swapped with another without power
interruption in the system (hot-swap).
NOTE : The SCSI hard disk drive bays contain a hot-swap back plane
that require an 80-pin single connector attachment (SCA) connector on
the drives that you install.