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1.1.2
Components
The DS20L system has the following observable components:
Enclosure
Fans
Bezel
Power Supply
Storage Bay
CD-ROM Bay
1.2
Specifications
This section describes relevant AlphaServer DS20L specifications.
1.2.1
Power Connectors
Figure 1-1 shows the two power connectors for the DS20L enclosure.
The main power connector provides single 12 VDC power (Figure 1-1,
5V standby power. The main power connector pinout is non-standard. There are
several voltage regulators on the motherboard to generate various voltages
required by the system. The disk power connector (
hard drive.
1-4 AlphaServer DS20L User's Guide
The system enclosure measures 1.75 inches high by 17.5
inches wide by 20.5 inches deep.
There are a total of 11 fans in the DS20L system: five on the
front of the system (connected by cables to the system
motherboard) and six mounted internally. Two of the six
internal fans are located between the hard drive bay and the
PCI card assembly. These are cabled onto the PCI riser.
Another fan cabled onto the PCI riser is located near the I/O
board; and the three visible from the back of the system cool
the power supply.
The system has a removable front bezel.
The DS20L system is equipped with a 275-watt AC power
(typical input power) 100-240 VAC 47-63 Hz power supply.
The system includes a custom mounting kit that allows the
installation of a one-inch-high 80-pin SCA SCSI disk drive.
The system accommodates an optional slimline CD-ROM
drive; its bay is located on top of the storage bay.
Y
) supplies power for the
X
) and
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