Cisco 7600-SIP-400 - SPA Interface Processor 400 Installation Manual page 220

Removing and Replacing the Power Supply
You should allow a minimum of 2.5 to 3 inches (63.5 mm to 76.2 mm) of space between the side of the
Note
power supply and any obstructions (such as the side of an enclosed equipment rack). This space is needed
to install and secure the DC-input power cables correctly. Incorrectly routing the DC-input power cables
can cause airflow blockage into the power supply and inadequate strain relief in the cables. The exact
amount of space required depends upon the gauge and flexibility of the DC-input power cables you are
using.
Verify that power is off to the DC circuit that is connected to the power supply you are installing. Place
Step 1
appropriate safety flag and lockout devices at power switch handle to avoid any circuit inputs from
becoming energized.
Caution Use both hands to install and remove power supplies. Each PWR-4000-DC weighs 33 pounds (15 kg).
Grasp the power supply handle with one hand, and place your other hand underneath the power supply.
Step 2
Slide the power supply into the power supply bay. Make sure that the power supply is fully seated in the
bay (Figure
Figure 5-90
0
Tighten the power supply captive installation screw
Step 3
Cisco 7600 Series Router Installation Guide
5-92
5-90).
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
Chapter 5 Removal and Replacement Procedures
(Figure 5-91).
OL-4503-26