Cisco Systems Cisco CRS-1 Manual De Usuario
2-19
Cisco CRS-1 Carrier Routing System 4-Slot Line Card Chassis Installation Guide
OL-10971-07
Chapter 2 Installing and Removing Power Components
Removing a DC Power Shelf
Steps
To remove the DC power shelf, follow these steps:
Step 1
Attach the ESD-preventive wrist strap to your wrist and connect its leash to one of the ESD connection
sockets on the front (PLIM) side of the chassis or a bare metal surface on the chassis.
sockets on the front (PLIM) side of the chassis or a bare metal surface on the chassis.
Bring Down All Power to the Chassis
Step 2
Power down the chassis:
a.
Go to the rear of the chassis. On the PIM, toggle both power shelf enable switches to OFF (see
Now the system’s boards and fans have no power.
Figure 2-14
DC Power Shelf Enable Switches
b.
Unplug the DC power supplies.
c.
Disconnect input power from the customer source.
Step 3
Remove both wiring block covers (see
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 60A DC cables (two cables per input) on the left from one wiring block, and the four
60A DC cables on the right from the other wiring block (see
60A DC cables on the right from the other wiring block (see
).
Step 5
Use a 10 mm hex socket wrench to disconnect the grounding cable (see
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