System Manual 4. System Components
76.7300FP11/2, Rev A 8/09 Page 2-33
Power Supply Unit Physical Specifications
Weight 0.80 pounds (0.36 kg)
Dimensions Height: 0.80 inches (20.25 mm)
Depth: 7.95 inches (202 mm)
Width: 4.57 inches (116 mm)
Fan Tray with Filter
4.22 This section describes the features of the 81.73040-R5 Fan Tray used in
the Tellabs 7345 Switch.
4.23 The fan tray supports two variable speed fans to provide system cooling
with ambient temperatures as high as 149
°F (65°C). The fan tray is designed to
provide sufficient cooling capacity even when a fan has failed on the module. A
replaceable fan filter (Tellabs part number 81.73060-R6) is included to protect the
system from particulate matter within the office.
4.24 A single fan drawer is used that supports six individual fans. When a fan
fails, the remaining five fans will provide sufficient airflow to allow proper system
operation across the supported operating temperature range. No disruption occurs
when a fan fails. If one or more fan units malfunction, a failure is reported.
4.25 The sync and alarm connectors are located on the Fan module. Refer to
Table 5.4, page 2-73 for the pinout of the alarm connector.
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