Cisco AS5800 Product Overview 1-29
Enhanced AC-Input Power Shelf
The enhanced AC-input power shelf inclu des two 2,000 -watt (W) AC- input po wer supplie s that plug
into a common power backplane in the enhanced AC-input power shelf. A single AC-input power
supply is capable of powering a fully configured Cisco5814 dial shelf. A second power supply
provides full redundancy.
During normal operation, the dual AC-input power supplies provide autom atic load-sharing, with
each power supply supporting 50 percent of the power load. When you remove one of the A C -input
power supplies, the remaining power supply immediately ramps up to full power and maintains
uninterrupted system power.
Note The AC-input power supplies in the enhanced AC-input power shelf are “hot-swappable,”
allowing you to remove or replace a power supply while the system is operating; system operation
will not be 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
enhanced AC-input power shelf front panel (Figure1-16). Ejector levers with locking spring clips
secure each power supply to the backplane connectors, and a handle on each power supply all ows
you to remove and replace the power supplies with ease.
Figure1-16 CiscoAS5800 Enhanced AC-Input Power Shelf—Front View
The enhanced 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.
All cable connections for AC-input power, DC-output power, and status signals are made from the
enhanced AC-input power shelf rear. (See Figure1-17) 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 maintenance bus (MBus), that monitors voltage tolerance levels, temperature
conditions, and power failure in the enhanced AC-in put power shelf. A grounding cable provides a
ground connection from the enhanced AC-input power shelf to the dial shelf.
22150
AC GOOD
PWR FAIL
PWR GOOD
V OUT
+
-
AC GOOD
PWR FAIL
PWR GOOD
V OUT
+
-
AC POWER A
AC POWER B
Power
switches