Cisco 6503 - Catalyst Firewall Security Sys Installation Manual page 244

Removing and Installing the DC-Input Power Supplies
Removing a 4000 W DC-Input Power Supply
Warning When installing the unit, always make the ground connection first and disconnect it last. Statement 42
Warning Before performing any of the following procedures, ensure that power is removed from the DC
circuits. To ensure that all power is removed, locate the circuit breakers or fuses on the DC power
lines that service the DC circuits. Turn OFF the DC power line circuit breakers and remove the DC
power line fuses. Statement 322
Voltage is present on the backplane when the system is operating. To reduce risk of an electric shock,
Warning
keep hands and fingers out of the power supply bays and backplane areas. Statement 166
To remove a 4000 W DC-input power supply, follow these steps:
Verify that power is off to the DC circuit that feeds power to the power supply that you are removing.
Step 1
As an added precaution, place the appropriate safety flag and lockout devices at the source power circuit
breaker, or place a piece of adhesive tape over the circuit breaker handle to prevent accidental power
restoration while you are working on the circuit.
Turn the power switch to the off (0) position on the power supply that you are removing. (See
Step 2
Figure
Turning off the power switch also disengages a pawl that unlocks the power supply from the chassis.
Figure 4-26
Note
version of this power supply does not have an outer terminal block cover. To order a retrofit kit
containing this cover, use Cisco Systems part number CVR-4000DC-TERM=.
Remove the two screws securing the outer terminal block cover. Lift the cover up to detach the two tabs
Step 3
from the slots on the power supply. Remove the cover and set it aside along with the screws. (See
Figure
Remove the two screws securing the left inner terminal block cover (covering the VE-1/VE-2 terminal
Step 4
block). Lift up on the cover to detach the tab from the slot on the power supply. Remove the cover and
set it aside along with the screws.
Remove the one screw securing the right inner terminal block cover (covering the VE-3 terminal block).
Step 5
Lift up on the cover to detach the tab from the slot on the power supply. Remove the cover and set it aside
along with the screw.
Step 6 Disconnect the source DC cables from the terminal blocks in this order:
1.
2.
3.
You must remove all DC-input wiring from both terminal blocks before physically removing the power
supply chassis.
Catalyst 6500 Series Switches Installation Guide
4-38
4-26.)
shows the PWR-4000-DC power supply with an outer terminal block cover. An earlier
4-26.)
Positive (+) source DC cables from the +VE-1, +VE-2, and +VE-3 terminal posts
Negative (–) source DC cables from the –VE-1, –VE-2, and –VE-3 terminal posts
Ground cable from the ground terminal posts
Chapter 4 Removal and Replacement Procedures
OL-5781-08