Network Card User Manual

Cisco AS5800 Product Overview 1-39
Power Requirements
Power Requirements
The Cisco AS5800 ships configured for either AC-input or DC-input power with loadsharing,
depending on your order.
AC-Input Power Shelf
The AC-input power shelf includes two 2,000W AC-input power supplies that plug into a common
power backplane in the AC-input power shelf. A single AC-input power supply is capable of
powering a fully configured Cisco 5814 dial shelf. A second power supply provides full redundancy.
During normal operation, the dual AC-input power supplies provide automatic loadsharing, with
each power supply supporting 50 percent of the power load. When you remove one of the AC-input
power supplies, the remaining power supply immediately ramps up to full power and maintains
uninterrupted system power.
Note The AC-input power supplies are “hot-swappable,” allowing you to remove or replace a
power supply while the system is operating; system operation is not affected. Whenever possible, we
recommend that you connect each AC-input power supply to a separate AC power source.
Each AC-input power supply is powered ON by a separate power switch, which is located on the
AC-input power shelf front panel. (See Figure 1-23.) Ejector levers with locking spring clips secure
each power supply to the backplane connectors, and a handle on each power supply allows you to
remove and replace the power supplies with ease.
Figure 1-23 Cisco AS5800 Standard AC-Input Power Shelf—Front View
The AC-input power shelf is three rack units high [5.25 in. (13.32 cm)], and mounts underneath the
dial shelf in a standard 19-in. 4-post or telco-type rack assembly. Note the rack placement of the
AC-input power shelf in Figure 1-1.
All cable connections for AC-input power, DC-output power, and status signals are made from the
AC-input power shelf rear. (See Figure 1-24.) Two modular power cables connect each AC-input
power supply to the site AC-input power source. Two DC-interconnect cables provide DC-output
power to the dial shelf. A monitor cable provides a status signal connection to the dial shelf filter
module MBus, which monitors voltage tolerance levels, temperature conditions, and power failure
in the AC-input power shelf. A grounding cable provides a ground connections from the AC-input
power shelf to the dial shelf.
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