2-22
Cisco CRS Carrier Routing System 4-Slot Line Card Chassis Installation Guide
OL-10971-10
Chapter 2 Installing and Removing Power Components
Removing a DC Power Shelf
Figure 2-19
DC Power Shelf Enable Switches
Step 3
Remove both wiring block covers (see
Figure 2-20
).
a.
Use a number 1 Phillips screwdriver to loosen the capture screw.
b.
Snap off the cover over the wiring block.
Disconnect the Input Power Cables and Grounding Cable
Step 4
Use a 10-mm hex socket wrench to disconnect the DC input power cables.
Disconnect the four 60 A DC cables (two cables per input) on the left from one wiring block, and the
four 60 A DC cables on the right from the other wiring block (see
Figure 2-20
).
Step 5
Use a 10-mm hex socket wrench to disconnect the grounding cable (see
Figure 2-20
).
1
DC power shelf enable switches
ST
AT
US
ST
AT
US
ST
AT
US
ST
AT
US
210861
B1
(RTN)
(-48V/-60V)
+
–
B0
B0
B1
ON
Side B
(RTN)
(-48V/-60V)
+
–
A1
(RTN)
(-48V/-60V)
+
–
A0
(RTN)
(-48V/-60V)
+
–
A0
A1
ON
Side A
SIDE A
SIDE B
1