4-32
Catalyst 6500 Series Switches Installation Guide
OL-5781-08
Chapter 4 Removal and Replacement Procedures
Removing and Installing the DC-Input Power Supplies
Installing a 2700 W DC-Input Power Supply
This section provides the procedures for installing a 2700 W DC-input power supply in the
Catalyst 6504-E switch chassis. The 2700 W DC-input power supply can operate at either 1350 W or at
2700 W. If you want to operate the power supply at 1350 W you only need to connect one pair of source
DC cables to either the VE-1 or the VE-2 lugs on the power supply terminal block. If you want to operate
the power supply at 2700 W, you need to connect two pairs of source DC cables to the VE-1 and the
VE-2 lugs on the power supply terminal block.
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
Note
For proper 2700 W DC-input redundant power configurations, all of the source DC for one 2700 W
DC-input power supply must come from the same battery system (A feed); all of the source DC for the
other 2700 W DC-input power supply must come from another battery system (B feed).
Note
For multiple DC-input power supplies, each DC input must be protected by a dedicated circuit breaker
or a fuse. The circuit breaker or fuse must be sized according to the power supply input rating and the
local or national electrical code requirements.
To install the 2700 W DC-input power supply in the Catalyst 6504-E chassis and cable it to source DC,
follow these steps:
Step 1
Ensure that the system (earth) ground connection has been made. For system ground connection
installation instructions, see the
“Establishing the System Ground” section on page 3-52
.
Step 2
Remove the power supply from its shipping container and remove any packaging material.
Step 3
Locate the plastic bags that accompanied the power supply and set them aside. One bag contains one
source DC cable guide, terminal block cover (plastic) with four screws, and two cable ties. The other
plastic bag contains the 1/4-20 nuts and lock-washers for the terminal posts. You will use these items
later in the procedure.
Step 4
Verify that source DC power is off to the DC circuit that feeds the power supply that you are installing.
As an added precaution, place the appropriate safety flag and lockout devices at the source DC 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 5
Grasp both power supply handles, as shown in
Figure 4-22
. Slide the power supply into the power supply
bay. Make sure that the power supply is fully seated in the bay. Tighten the four captive installation
screws.
Warning
Power supply captive installation screws must be tight to ensure protective grounding continuity.
Statement 289
