Cisco 4500M

7-10
Software Configuration Guide—Release 12.2(25)EW
OL-6696-01
Chapter 7 Environmental Monitoring and Power Management
Power Management
Special Considerations for the 1400 W DC Power Supply
Caution Do not mix the 1400 W DC power supply with any other power supply, even for a hot swap or other
short-term emergency. Doing so can seriously damage your switch.
Keep in mind the following guidelines when using a 1400 W DC power supply with your Catalyst 4500
series switch:
• The 1400 W DC power supply works with a variety of DC sources. The DC input can vary from
300 W to 7500 W. Refer to the power supply documentation for additional information.
• The supervisor engine cannot detect the DC source plugged into the 1400 W DC power supply. If
you are using the 1400 W DC power supply, use the power dc input command to set the DC input
power. For more information on this command, see the “Configuring the DC Input for a Power
Supply” section on page 7-11.
Table 7-3 Available Power for Switch Power Supplies
Power Supply Redundant Mode (W) Combined Mode (W) Sharing Ratio
1000 W AC Chassis
1
= 1000
PoE = 0
1. Chassis power includes power for the supervisor(s), all line cards, and the fan tray.
Chassis = 1667
PoE = 0
2/3
1300 W AC Chassis (max) = 1000
PoE (max) = 800
Chassis + PoE + Backplane <
1300
Chassis (min) = 767
PoE (max) = 1333
Chassis (max) = 1667
PoE (min) = 533
Chassis + PoE +
Backplane <
2200
2/3
1400 W DC Chassis (min) = 200
Chassis (max) = 1360
PoE (max)
2
= (DC Input
3
-
[Chassis (min) + Backplane] /
0.75) * 0.96
2. The efficiency for the 1400 W DC power supply is 0.75, and 0.96 is applied to PoE.
3. DC input can vary for the 1400 W DC power supply and is configurable. For more information, see “Special Considerations
for the 1400 W DC Power Supply” on page 10.
Chassis = 2267
4
PoE
5
4. Not available for PoE.
5. Not available for PoE.
Chassis—2/3
PoE—0
1400 W AC Chassis = 1360
PoE = 0
6
6. No voice power.
Chassis = 2473
PoE = 0
9/11
2800 W AC Chassis = 1360
PoE = 1400
Chassis = 2473
PoE = 2333
Chassis
7
—9/11
PoE
8
—2/3
7. Data-only.
8. Inline power.