Maintaining the Cisco12008 7-23
Adding, Removing, or Replacing a DC-Input Power Supply
Note The carrying handle on the DC-input power supply is designed to be
grasped with your left hand, rather than your right hand. Using your left hand
eliminates the potential for catching your fingers in the limited space between
the plastic safety shield (see Figure 7-7) and the carrying handle.
Warning The DC-input power supply weighs 14 lb (6.36 kg). For safety, use both hands
to install the unit in the power supply bay.
Step5 Position the power supply appropriately for insertion into the vacant upper bay.
Step6 Gently slide the unit into the bay, carefully seating it so that the power supply
faceplate rests flush against the sheet metal of the power supply bay.
Caution To prevent damage to the blind-mating connector at the rear of the power supply,
do not use excessive speed or force when inserting the power supply into the bay.
Note All necessary electrical connections between the power supply and the backplane
are accomplished automatically by means of the blind-mating connector at the rear of the
power supply.
Step7 Using a 1/4-inch flat-blade screwdriver, tighten the captive installation screw on
the power supply faceplate (see Figure7-6).
Step8 Remove the plastic safety shield (see Figure 7-7) that covers the alarm terminal
block and the positive (+) and negative (–) terminals on the power supply
faceplate.
To remove the plastic safety shield, take the following actions:
(a) Loosen the knurled thumb wheel on the bottom left standoff that secures
the safety shield to the power supply faceplate.