Cisco GSR12/60 - 12012 Router -AnyLAN, SONET/SDH Installation And Configuration Manual page 256

Removing and Replacing an AC-Input Power Supply
Step 3
Caution
excessive force when installing a power supply into the bay.
Step 4
Step 5
Step 6
Step 7
7-16 Cisco 12012 Gigabit Switch Router Installation and Configuration Guide
If you are upgrading your Cisco 12012 with an additional AC-input power
supply, you must remove the power supply blank covering the empty power
supply bay before installing the power supply. To remove a power supply blank,
complete the following steps:
Loosen the captive screw on the power supply blank faceplate.
(a)
Slide the power supply blank out the front of the power supply bay.
(b)
Retain the blank for possible future use.
(c)
To prevent damaging the power supply backplane connector, do not use
The power supply bays are designated A1, A2, B1, and B2, from left to
Note
right. Install power supplies in the bays in the following order: A1, B1, A2, and
B2. Any bay that does not have a power supply installed must have a power
supply blank installed to maintain airflow and for EMI considerations.
Using two hands to support and guide the power supply, slide it into the vacant
bay. Push the power supply all the way into the power supply bay until the
faceplate makes contact with the front of the bay.
All electrical connections between the power supply and the backplane
Note
are made automatically when the power supply is fully inserted in the power
supply bay.
Tighten the captive screw on the power supply faceplate.
Connect the AC power cord to the power supply AC receptacle. Clip the spring
clip over the power cord plug.
Connect the other end of the AC power cord to the source AC receptacle.