Cisco 7600-SIP-400 - SPA Interface Processor 400 Installation Manual page 200

Removing and Replacing the Power Supply
For redundant power supplies, you must connect the PWR-4000-DC power supply ground for both
Note
power supplies.
a. Install the PWR-4000-DC power supply ground as described in this procedure.
If you intend to use an additional system (earth ground), ensure that the system ground connection
b.
has been made. For ground connection installation instructions, see the
Connection" section on page
Verify that power is off to the DC circuit that is connected to the power supply you are installing. Place
Step 2
appropriate safety flag and lockout devices at power switch handle to avoid any circuit inputs from
becoming energized.
Use both hands to install and remove power supplies. Each PWR-4000-DC weighs 33 pounds (15 kg).
Caution
Grasp the power supply handle with one hand, and place your other hand underneath the power supply.
Step 3
Slide the power supply into the power supply bay. Make sure that the power supply is fully seated in the
bay (Figure
Figure 5-75
0
Step 4 Tighten the power supply captive installation screw
Cisco 7600 Series Router Installation Guide
5-72
5-75).
Handling a DC-Input Power Supply
VE-1
+
+ VE-3
- VE-1
- VE-3
+ VE-2
- VE-2
I
INPU T OK
FAN
OUTP UT
1
2
3 OK
FAIL
3-19.
(Figure
Chapter 5 Removal and Replacement Procedures
"System Ground
5-76).
OL-4503-26