Cisco 6503 - Catalyst Firewall Security Sys Installation Manual page 247

Chapter 4 Removal and Replacement Procedures
When installing a 4000 W DC-input power supply, observe the following guidelines:
For proper 4000 W DC-input redundant power configuration, all source DC cables for one 4000 W
•
DC-input power supply must come from the same battery system (A feed), and all source DC cables
for the second 4000 W DC-input power supply must come from a different battery system (B feed).
Note
The 4000 W DC-input power supply is designed to operate at either 2700 W or 4000 W. To operate
•
the power supply at 2700 W, you can wire any two positive (+) negative (–) terminal pairs (VE-1
and VE-2, VE-2 and VE-3, or VE-1 and VE-3). To operate the power supply at 4000 W, you must
wire all three terminal pairs.
Note
• For a single 4000 W DC-input power supply installation, install the power supply in the left-side
power bay (POWER 1).
Before performing any of the following procedures, ensure that power is removed from the DC
Warning
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.
Warning
Statement 289
Refer to
Figure 4-26
Note
version of this power supply does not have an outer terminal block cover. To order a retrofit kit
containing this cover, use Cisco Systems part number CVR-4000DC-TERM=.
OL-5781-08
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.
The 4000 W DC-input power supply does not operate with only one pair of source DC cables
connected.
Figure 4-26 for a front view of the power supply with the major features called out.
shows the PWR-4000-DC power supply with an outer terminal block cover. An earlier
Removing and Installing the DC-Input Power Supplies
Catalyst 6500 Series Switches Installation Guide
4-41