Cisco GSR12/60 - 12012 Router -AnyLAN, SONET/SDH Installation And Configuration Manual page 268

Removing and Replacing a DC-Input Power Supply
Step 9
Step 10
Step 11
Step 12
Caution
when sliding the power supply into the bay.
Step 13
7-28 Cisco 12012 Gigabit Switch Router Installation and Configuration Guide
Position the source DC power cable leads underneath the power supply handle
on the power supply faceplate in the following order from left to right: negative
(–), positive (+), and ground. Place the DC power cable bracket over the power
cable leads and secure the cable leads and the cable bracket to the power supply
faceplate with the two screws that you removed earlier. (See Figure 7-10.)
Verify that the source DC wiring from the source DC breaker to the power
supply is correct and that the terminal connections on the power supply are
correct and tight.
Place the power supply front cover so that the keyholes are positioned over the
two standoff screws on the power supply faceplate. Slide the cover down slightly
to engage the two screws and secure it in place by tightening the two screws.
If you plan to upgrade your Cisco 12012 with a second DC-input power supply,
you must remove the two power supply blanks covering the empty power supply
bays 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 that secures
(a)
the power supply blank to the card cage assembly.
Slide the power supply blank out of the front of the power supply bay.
(b)
Repeat steps (a) and (b) to remove the second power supply blank. Retain
(c)
the two power supply blanks for possible future use.
To prevent damaging the backplane power connector, do not use excessive force
Using two hands to support and guide the power supply, slide it into the vacant
bay. (See Figure 7-13.) Push the power supply into the bay until the power
supply captive jackscrew makes contact with the power supply bay.