Cisco 6503 - Catalyst Firewall Security Sys Installation Manual page 222

Removing and Installing the DC-Input Power Supplies
Removing a 950 W DC-Input Power Supply
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
Warning Hazardous voltage or energy is present on the backplane when the system is operating. Use
caution when servicing. Statement 1034
To remove a DC-input power supply, follow these steps:
Identify which PEM is connected to the power supply you are removing (PEM 1 or PEM 2). Verify that
Step 1
the source power is off to the circuit that is connected to that PEM.
Figure 4-8
Note
Step 2 Loosen the captive installation screws on the power supply. (See
Step 3 Grasp the power supply handle with one hand, and slide the power supply part of the way out of the
chassis. Place your other hand underneath the power supply, as shown in
power supply completely out of the chassis.
If the power supply bay is to remain empty, install a blank power supply filler plate (Cisco
Step 4
part number 800-16727-01) over the opening, and secure it with the captive installation screws.
Figure 4-8
DC PEM 1
terminal block
Catalyst 6500 Series Switches Installation Guide
4-16
shows the location of the DC-input PEMs on the Catalyst 6503 switch chassis.
The system (NEBS) ground serves as the primary safety ground for the Catalyst 6503 and
Catalyst 6503-E chassis that are equipped with DC-input power supplies. The DC-input power
supplies for these chassis do not have a separate ground. Make sure that the chassis you are
working on has the system (NEBS) ground installed.
Catalyst 6503 Switch—DC-Input PEM Location
DC PEM 1 DC PEM 2
screws
WS-X6 K-SUP 2-2GE
CONSOL E
PORT
MODE
CONSOL E
SUPER VISOR 2
OSM-4OC 12 POS-SI
4 PORT OC-12 POS SM
IR
OSM-4OC 12 POS-SI
4 PORT OC-12 POS SM
IR
Chapter 4
Cable clips
Switch Load
100%
PORT 1
PCMCIA
EJECT
1%
Removal and Replacement Procedures
Figure 4-9.)
Figure 4-10, and slide the
PORT 2
OL-5781-08