PN 060914-000
Revision C, October 2001
Page 1-3
© 2001, C-COR.net Corporation
3. FUNCTIONAL DESCRIPTION
3.01
Figure 1-2 is a functional block diagram of the Integrated Fan/Power Supply assembly.
The AC input to the assembly is switched, fused (both legs of the AC input line), and filtered
before being distributed to the AC/DC power converter(s). The assembly contains the AC/DC
power converter impeller cooling fans, and the three box type fans that are used to cool the
HWX Equipment Shelf.
Figure 1-2. Integrated Fan/Power Supply Functional Block Diagram
3.02
The primary and redundant (dual supply version) AC/DC power converters convert
the filtered AC input to regulated -48 VDC outputs. The -48 VDC outputs from the power
converters are routed to the rear panel to individual 3-position screw-type terminal blocks
(Power Supply A, and Power Supply B for the dual supply version).
3.03
Each power converter provides input and output status signals to the front panel LEDs.
The
green
AC LEDs will illuminate when the AC input to the converters are at an acceptable
level. The
green
DC LEDs will illuminate when the DC output from the converters are at an
acceptable level. All the LEDs are placed on the LED printed circuit board, located in the
assembly, and receives their DC power from the primary (A) supply.
3.04
Individual, 25 cfm impeller cooling fans are used to provide cooling air to the power
converters. The air from these fans are directed across the supplys heat sink and exhausted
out the side of the assembly. These fans are independent of the box type fans that are used
to provide cooling air to the HWX Equipment Shelf.
3.05
Three (3) AC input box type fans are located across the width of the assembly. Each
of these fans is capable of providing a minimum of 105 cfm. The fans are positioned such that
when the Integrated Fan/Power Supply assembly is placed above an HWX Equipment Shelf,
they will draw cooling air up through the shelf, and then exhausted from the top of the Fan/Power
Supply assembly.
Summary of Contents for Optiworx HW Series
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