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Chapter 4      Removal and Replacement Procedures
Removing and Installing the AC-Input Power Supplies
Installing an AC-Input Power Supply
Wa r n i n gThe plug-socket combination must be accessible at all times, because it serves as the main 
disconnecting device. Statement 1019
To install an AC-input power supply, follow these steps:
St e p 1Remove the replacement power supply from its shipping packaging.
St e p 2Verify that the replacement power supply power switch is in the off (0) position.
St e p 3If necessary, remove the blank power supply cover from the empty power supply bay by removing the 
two Phillips-head screws. Save the blank faceplate and the two screws for future use.
CautionUse both hands to handle a power supply.
St e p 4Grasp the power supply handle with one hand and place your other hand underneath to support the 
bottom of the power supply, as shown in Figure 4-7, and slide the power supply all the way into the 
power supply bay. Make sure that the power supply is fully seated in the bay.
St e p 5Tighten the two captive installation screws (see Figure 4-1) on the front panel of the AC-input power 
supply.
St e p 6Before you connect the power supply to a power source, verify that all site power and grounding 
requirements have been met.
St e p 7Verify that you have the correct AC power cord for your location and power supply rating. See 
Appendix A, “Power Supply Specifications,” for a list of supported AC power cords for your particular 
AC-input power supply.
St e p 8Plug the power cord appliance connector into the power supply AC-in receptacle (see Figure 4-8) and 
tighten the screw on the power cord retention clip. 
Figure 4-8 Plugging the Power Cord into the Power Supply (Single-Input Power Supply Shown)
St e p 9
Plug the other end of the power cord to source AC.
NoteIn a chassis with dual power supplies or power supplies with multiple AC inputs, it is 
recommended that you connect each AC power cord to a separate source AC circuit.
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Chapter 4      Removal and Replacement Procedures
Removing and Installing the DC-Input Power Supplies
St e p 10Set the power switch to the on (|) position (see Figure 4-9).
Figure 4-9 Powering On the Power Supply (Single-Input Power Supply Shown)
St e p 11
Verify the power supply operation by checking the power supply’s front-panel LEDs. You should see the 
following:
•The LED labeled GOOD or INPUT OK is green.
•The LED labeled OUTPUT FAIL is not lit.
•The LED labeled FAN OK is green.
St e p 12Check the power supply and system status from the system console by entering show power command. 
For more information on this command, see the command reference publication for your switch.
St e p 13If the LEDs or show power command output indicate a power problem or other system problem, see 
Chapter 5, “Troubleshooting,” for more information.
Removing and Installing the DC-Input Power Supplies
This section describes how to remove and install the DC-input power supplies and contains the following 
topics:
•Required Tools, page 4-8
•Removing a DC-Input Power Supply, page 4-9
•Installing a DC-Input Power Supply, page 4-12
Required Tools
You need the following tools to perform this procedure:
•A Phillips-head screwdriver 
•A 10-mm wrench/socket
•Wire cutters (you might need to cut any cable ties that are installed on the power supply)
Power switch
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Chapter 4      Removal and Replacement Procedures
Removing and Installing the DC-Input Power Supplies
Removing a DC-Input Power Supply
Wa r n i n gBefore performing any of the following procedures, ensure that power is removed from the 
DC circuit. Statement 1003
To remove a DC-input power supply, follow these steps:
St e p 1Turn off the in-line power switch on the DC-input power supply front panel. (This step applies to the 
single input power supply only, PWR-C45-1400DC-P; the triple-input power supply, 
PWR-C45-1400DC, does not have this switch.) 
St e p 2Verify that power is off to the DC circuit on the power supply that you are removing. 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.
St e p 3Loosen the screw on the terminal block cover, remove the cover from the terminal block, and set it aside 
(see Figure 4-10 or Figure 4-11). 
NoteThe triple-input power supply has two screws securing the terminal block cover. 
Figure 4-10 DC-Input Power Supply
Captive screwCaptive screw
In-line power switch       
Serial communication
connectorMain power switch
Terminal block
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Chapter 4      Removal and Replacement Procedures
Removing and Installing the DC-Input Power Supplies
Figure 4-11 DC Triple-Input Power Supply
St e p 4
Disconnect the DC-input wires from the terminal block. Disconnect the ground wire last (see 
Figure 4-12 or Figure 4-13).
Wa r n i n gWhen installing or replacing the unit, the ground connection must always be made first and 
disconnected last. Statement 1046
Figure 4-12 Connecting the DC-Input Wires
231891
Power switch 1, 2, 3
Terminal block
Ground lugs Input OK 1, 2, 3 LEDsFan OK LEDOutput Fail LED
1-
+
-
+
-
+2
3
Captive screw
Captive
screwMinus (-)Plus (+)
RS-485 serial
communnication
connector
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Grounding lug
Grounding lug nuts
DC-input wires
Negative
Positive
Ground 
						

							  
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Chapter 4      Removal and Replacement Procedures
Removing and Installing the DC-Input Power Supplies
Figure 4-13 Connecting the DC-Input Wires (Triple-Input Power Supply)
St e p 5
Loosen the two captive screws on the power supply. (See Figure 4-14, which shows the single-input 
power supply. The triple-input power supply has captive screws in the same location.) 
Figure 4-14 Loosening the Captive Screws
St e p 6
Grasp the power supply handle with one hand. Place your other hand underneath as you slowly pull the 
power supply out of the chassis power supply bay (see Figure 4-15).
231892
1-
+
-
+
-
+2
3
Grounding lugs (2)
Grounding lug nut
DC-input wires
Negative
Positive
Ground
Captive screws
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Chapter 4      Removal and Replacement Procedures
Removing and Installing the DC-Input Power Supplies
Figure 4-15 Handling a DC-Input Power Supply
St e p 7
If the chassis power supply bay is to remain empty, install a blank power supply filler plate 
(WS-C4KE-PS-CVR) over the opening and secure it with the mounting screws. The blank power supply 
filler plate protects the inner chassis from dust and prevents accidental contact with the live voltage at 
the rear of the bay.
Wa r n i n gBlank faceplates and cover panels serve three important functions: they prevent exposure to 
hazardous voltages and currents inside the chassis; they contain electromagnetic interference 
(EMI) that might disrupt other equipment; and they direct the flow of cooling air through the 
chassis. Do not operate the system unless all cards, faceplates, front covers, and rear covers are 
in place. Statement 1029
Installing a DC-Input Power Supply
Wa r n i n gBefore performing any of the following procedures, ensure that power is removed from the 
DC circuit. Statement 1003
Wa r n i n gA readily accessible two-poled disconnect device must be incorporated in the fixed wiring. 
Statement 1022
Wa r n i n gThis product requires short-circuit (overcurrent) protection, to be provided as part of the 
building installation. Install only in accordance with national and local wiring regulations. 
Statement 1045
Wa r n i n gUse copper conductors only. Statement 1025
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Chapter 4      Removal and Replacement Procedures
Removing and Installing the DC-Input Power Supplies
Wa r n i n gWhen stranded wiring is required, use approved wiring terminations, such as closed-loop or 
spade-type with upturned lugs. These terminations should be the appropriate size for the wires 
and should clamp both the insulation and conductor. Statement 1002
To install a DC-input power supply, follow these steps:
St e p 1Verify that power is off to the DC circuit on the power supply that you are removing. 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.
St e p 2Grasp the power supply handle with one hand. Place your other hand underneath it as you slowly insert 
the power supply into the bay (see Figure 4-15). Make sure that the power supply is fully seated in the 
bay.
St e p 3Tighten the captive screws on the power supply (seeFigure 4-14).
St e p 4Before you connect the power supply to a power source, ensure that all site power and grounding 
requirements have been met.
St e p 5Remove the terminal block cover from the terminal block.
St e p 6Connect the source DC cables to the power supply terminal block. The proper wiring sequence is ground 
to ground, positive to positive, and negative to negative (see Figure 4-12 or Figure 4-13 depending on 
your installation). 
The 1400W triple-input power supply has two grounding posts; use the one that is most convenient for 
your installation. 
Wa r n i n gWhen installing or replacing the unit, the ground connection must always be made first and 
disconnected last. Statement 1046
St e p 7After ensuring that all wire connections are secure, reinstall the terminal block cover.
CautionIn a system with multiple power supplies or a single triple-input power supply, connect each power 
supply to a separate DC power source. In the event of a power source failure, if the second source is still 
available, it can maintain maximum overcurrent protection for each power connection.
St e p 8Remove any safety flag and lockout devices or any tape from the source DC circuit breaker switch handle 
and restore power by moving the circuit breaker switch handle to the on (|) position.
St e p 9Turn the power supply power switch to the on (|) position. 
						

							  
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Chapter 4      Removal and Replacement Procedures
Removing and Installing the Chassis Fan Tray Assembly
St e p 10Verify power supply operation by checking the power supply’s front-panel LEDs. You should see the 
following:
•The LED labeled INPUT OK is green.
•The LED labeled OUTPUT FAIL is not lit.
St e p 11Check the power supply and system status from the system console by entering the show power 
command. For more information on the commands, see the command reference publication for your 
switch and software.
St e p 12If the LEDs or the show power command (Cisco IOS) output indicate a power problem or other system 
problem, see Chapter 5, “Troubleshooting,” for more information.
Removing and Installing the Chassis Fan Tray Assembly
This section describes how to remove and install the chassis fan tray assembly for the Catalyst 4500 
E-series switches and is contains the following topics:
•Required Tools, page 4-14
•Removing the Fan Tray Assembly, page 4-14
•Installing the Fan Tray Assembly, page 4-15
Figure 4-16 illustrates the Catalyst 4506-E system fan tray assembly. The fan tray assemblies for the 
other chassis attach in a very similar way. 
Required Tools
You will need a Phillips-head screwdriver for the following two procedures.
Removing the Fan Tray Assembly
Wa r n i n gWhen removing the fan tray, keep your hands and fingers away from the spinning fan blades. Let 
the fan blades completely stop before you remove the fan tray. Statement 258
CautionNever operate the system for an extended period if the fan tray assembly is removed or if it is not 
functioning properly. An overtemperature condition can cause severe equipment damage. 
						

							  
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Chapter 4      Removal and Replacement Procedures
Removing and Installing the Chassis Fan Tray Assembly
To remove the existing fan tray assembly, follow these steps:
St e p 1Loosen the two captive installation screws on the fan tray assembly.
Figure 4-16 Catalyst 4506-E System Fan Tray Assembly
St e p 2
Grasp the fan tray assembly handle and slide the fan tray assembly out of the chassis; gently move it side 
to side if necessary to unseat it from the backplane. Remove the fan tray assembly from the chassis and 
set it aside.
Installing the Fan Tray Assembly
To install the replacement fan tray assembly, follow these steps:
St e p 1Remove the replacement fan tray assembly from the shipping packaging.
St e p 2Hold the fan tray assembly with the fans facing to the right. 
St e p 3Place the fan tray assembly into the fan tray assembly bay so it rests on the chassis, and then lift the fan 
tray assembly up slightly, aligning the top and bottom guides.1Captive installation screws 2Fan tray assembly
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Chapter 4      Removal and Replacement Procedures
Removing and Installing the Backplane Modules
St e p 4Slide the fan tray assembly into the chassis until the two captive installation screws make contact with 
the chassis.
St e p 5Tighten the two captive installation screws to secure the fan tray assembly in the chassis. 
Verifying the Installation
NoteTo check the operation of the fans, you need to power up the chassis.
To verify that the new fan tray assembly is installed correctly and is operating properly, follow these 
steps:
St e p 1Listen for the fans; you should immediately hear them operating. If you do not hear them, ensure that 
the fan tray assembly is inserted completely in the chassis and that the faceplate is flush with the switch 
back panel.
St e p 2The fan tray assembly LED should light and be green.
St e p 3If after several attempts the fans do not operate, or if you experience trouble with the installation (for 
instance, if the captive installation screws do not align with the chassis holes), contact the Cisco TAC 
for assistance.
Removing and Installing the Backplane Modules 
There are five redundancy modules (also called mux buffers) and one clock module on the 
Catalyst 4507R-E and the Catalyst 4507R+E switch chassis backplane. The Catalyst 4510R-E and the 
Catalyst 4510R+E have eight redundancy modules on their backplane. They are accessible from the front 
of the chassis by removing all of the supervisor engines, switching modules, and blank slot covers. There 
are two types of redundancy modules, and they are interchangeable.
The clock module replacement procedure is identical to the redundancy module replacement procedure. 
Both the redundancy modules and the clock modules are not hot-swappable; the switch must be shut 
down to replace them.
To replace the backplane modules, follow these steps:
St e p 1Make sure that you are grounded with an ESD strap.
St e p 2Turn off the power to the chassis.
St e p 3Make a record of all network interface cable connections to the switch. Also, make a record of the 
switching modules and their slot assignments. This step will aid you when you return the system to 
operation after the removal and replacement procedure is completed.
St e p 4Disconnect all of the network interface cables to the switch and carefully set them aside. 
St e p 5Remove all supervisor engines and switching modules from the chassis and carefully place each one in 
a separate antistatic bag or on an individual antistatic mat.