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Cisco ME 6500 Series Ethernet Switch Installation Guide
OL-8900-03
Chapter 4 Removal and Replacement Procedures
Removing and Installing the 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
When installing or replacing the unit, the ground connection must always be made first and
disconnected last.
Statement 1046
Required Tools
To perform this procedure, you will need a Number 2 Phillips screwdriver.
Removing the DC-Input Power Supply
To remove a DC-input power supply, follow these steps:
Step 1 Set the power switch to the off (0) position on the power supply that you are removing.
Step 2 Verify that power is off to the DC circuit that feeds 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.
Step 3 Remove the clear plastic terminal block cover from the power supply terminal block.
Step 4 Disconnect the DC-input cables from the power supply terminal block in this order (See Figure 4-1, top
view):
1. Positive (+) source DC cable from the positive (+) terminal
2. Negative (–) source DC cable from the negative (–) terminal
3. Ground cable from the ground terminal
Step 5 Loosen the two captive installation screws on the power supply.
Step 6 Grasp the power supply handle with one hand, and slide the power supply halfway out of the chassis.
Place your other hand underneath the power supply, as shown in
Figure 4-1 (bottom view), and slide the
power supply completely out of the chassis. Set the power supply aside.
Note The DC power supply is equipped with an EMI gasket on the top, bottom, and sides (on the front
edge) of the power supply. When sliding the power supply into or out of the power supply bay,
be careful not to damage the EMI gaskets.
Step 7 If the power supply bay is to remain empty, install a blank faceplate (Cisco part number 700-20988-xx)
over the opening, and secure it with the two captive installation screws.