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

The 4000 W DC-input power supply can be wired for 2700 W or 4000 W operation. The type of 
installation that you are performing determines the number of power cables and how they are routed. 
Refer to 

 to select the appropriate installation procedure for your site.

Observe the following guidelines when installing a 4000 W DC-input power supply:

For proper 4000 W DC-input redundant power configuration, all three pairs of input wires for one 
4000 W DC-input power supply must come from the same battery system (A feed), and all three 
pairs of input wires for the second 4000 W DC-input power supply must come from a different 
battery system (B feed).

The 4000 W DC-input power supply can operate at either 2700 W or 4000 W. To operate at 2700 W, 
you can wire any two positive (+)/negative (-) terminal pairs in any sequence. To operate at 4000 W, 
wire all three terminal pairs.

For a single 4000 W DC-input power supply installation, install the power supply in the left-side 
power bay (POWER 1).

The 4000 W DC-input power supply will not operate with only one positive (+)/negative (-) terminal 
pair installed.

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

Power supply captive installation screws must be tight to ensure protective grounding continuity. 
Statement 289

 shows a 4000 W DC-input power supply.

2700 W operation

A single 4000 W power supply

2700 W operation

A redundant (second) 4000 W 
power supply

4000 W operation

A single 4000 W power supply

4000 W operation

A redundant (second) 4000 W 
power supply