Cisco CATALYST 6509E 9 SLOT 15U CHASSIS NO POWER SUPPLY NO FAN TRAY Specification Guide

This section covers the power supply removal and installation procedures for the 4000 W DC-input 
power supply and is divided into the following topics:

Use a flat-blade or number 2 Phillips-head screwdriver to perform these procedures. Additionally, wire 
cutters may be necessary to cut cable tie-wraps.

When installing the unit, always make the ground connection first and disconnect it last. Statement 42

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 

Voltage is present on the backplane when the system is operating. To reduce risk of an electric shock, 
keep hands and fingers out of the power supply bays and backplane areas. Statement 166

Follow these steps to remove a 4000 W DC-input power supply:

Verify that power is off to the DC circuit connected to the DC-input 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.

Turn the power switch to the Off (0) position on the power supply that you are removing. (See 

.) Turning off the power switch also disengages a pawl that unlocks the power supply from 

the chassis.