4-54
Catalyst 6500 Series Switches Installation Guide
OL-5781-04
Chapter 4 Removal and Replacement Procedures
Removing and Installing the Power Entry Modules (PEMs)
Step 5 Plug the power cord into the PEM. (See Appendix A for a list of supported AC power cords.)
Step 6 Connect the other end of the power cord to an AC-input power source.
Caution In a system with dual power supplies, connect each power supply to a separate input source. In case
of a power source failure, the second source will most likely still be available.
Step 7 Turn the power switch to the On (|) position on the PEM.
Removing the DC-Input PEM
Warning
Before performing any of the following procedures, ensure that power is removed from the
DC circuit.
Statement 1003
Warning
Hazardous voltage or energy is present on the backplane when the system is operating. Use
caution when servicing.
Statement 1034
Warning
When installing or replacing the unit, the ground connection must always be made first and
disconnected last.
Statement 1046
Follow these steps to remove a DC-input PEM:
Step 1 Verify that power is off to the DC circuit for the PEM 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 2 Loosen the captive installation screws on the PEM. (See Figure 4-44.)
Step 3 Slide the PEM part way out of the chassis so that you have access to the PEM terminal block screws.
(See Figure 4-45.)
Step 4 Disconnect the DC-input wires from the PEM terminal block in this order:
1. Positive (+)
2. Negative (–)
Note It is not necessary to disconnect the system ground connection.
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