Installing the CiscoAS5800 3-3
Installing the Power Shelf in the Rack
Figure3-1 Cables Mounted on the Rear of the AC Power Shelf
Installing the Power Shelf in the Rack
You install the power shelf in the rack by securing the permanent mounting flanges to two posts or
mounting strips in the rack using the slotted mounting screws provide d. Because the mounting
flanges support the weight of the entire power shelf, be sure to use at least two slotted screws per
mounting flange.
Note You need to leave 1.75 in. (4.45 cm) between the power shelf and the dia l shelf that you will
install directly above it.
Caution To maintain a low center of gravity, ensure that heavier equipment is installed near the
bottom of the rack.
Caution The AC-input power shelf with both po we r sup pli es i nstalle d weig hs approxi mate ly 47lb
(21.31 kg). Use caution when lifting the power shelf. Bend your knees and lift usin g your legs. Do
not strain your back. We recommend that you remove the power supplies from the AC-input power
shelf before you mount it in a rack.
To remove a standard power supply, follow these steps:
Caution A single power supply weighs 14.5 lb (6.6 kg). Use both hands when removing or
replacing a power supply.
Step1 Attach an ESD-preventive wrist strap between you and an unpainted chassis s urface.
Step2 Lift the metal sprin g-clip in the center of the ejector lever to re lease the lock. (The p ower
supplies are secured by self-locking ejector levers. (See Figure3-2.)
Step3 Apply downward pressure to the ejector lever to disconnect the power supply from the
power backplane.
Red Black
Ground
BUS
—
terminal
stud
BUS
+
terminal
stud
Red
Black
Monitor
cable
29094