Cisco CATALYST 6500 2500 WATT AC POWER SUPPLY 规格指南
AC and DC input (WS-CAC-1300W and WS-CDC-1300W)
2500 W: power supply = 55.50 A
AC and DC input (WS-CAC-2500W and WS-CDC-2500W)
4000 W: power supply = 95.76 A
AC input only (WS-CAC-4000W-US1 or WS-CAC-4000W-INT)
Refer to
Preparing for Installation
for more information on circuit type and power cord requirements.
Refer to the
Table 1-11 Power Supply Front Panel LEDs
section of
Product Overview
(Catalyst 6500 Series
Installation Guide) for more information on power supply LEDs.
The chassis does draw some power for fans and (some) bus termination, but this power is already factored in the power
budget. Notice that the 1300 W power supply can supply 27.46 A. This is the value of the 42 volt (V) supply to which
reference is made.
budget. Notice that the 1300 W power supply can supply 27.46 A. This is the value of the 42 volt (V) supply to which
reference is made.
Here is an example:
27.46A * 42V = 1153W + 146W (for the chassis) = 1300W
This applies to all power supplies. The number that is published for the power supply is only for the power that the
Supervisor Engines/line cards will consume.
Supervisor Engines/line cards will consume.
There is no Catalyst 6500/6000 power supply with output that is rated at 1800 W. The 1800 W number relates to the
1300 W AC power supply. The 1800 W number appears on the front panel silkscreen (of some versions of this unit)
and indicates the input power rating (or maximum system power dissipation) of the unit.
1300 W AC power supply. The 1800 W number appears on the front panel silkscreen (of some versions of this unit)
and indicates the input power rating (or maximum system power dissipation) of the unit.
Note: The silkscreen marking on the unit has confused many people. Cisco has discontinued this type of marking on
power supplies.
power supplies.
There is no issue with reliability when you run the power supply to the 27.46 A maximum limit that the power
management software sets for the 1300 W power supply. This 27.46 A maximum is 75 to 80 percent of the theoretical
maximum capacity of the supply at a 40-degrees Celsius (C) ambient. This derating is typical of power supplies and is
there to make sure that there is plenty of margin. This increases the long-term reliability of the supply. Also, all the
power consumption values for each of the cards are generated for a worst-case traffic configuration (about 100
percent). For example, power consumption for a Gigabit module includes all Gigabit Interface Converters (GBICs) that
are installed. The actual usage is less during typical operation.
management software sets for the 1300 W power supply. This 27.46 A maximum is 75 to 80 percent of the theoretical
maximum capacity of the supply at a 40-degrees Celsius (C) ambient. This derating is typical of power supplies and is
there to make sure that there is plenty of margin. This increases the long-term reliability of the supply. Also, all the
power consumption values for each of the cards are generated for a worst-case traffic configuration (about 100
percent). For example, power consumption for a Gigabit module includes all Gigabit Interface Converters (GBICs) that
are installed. The actual usage is less during typical operation.
Supervisor Engines/Line Cards
Some initial-production Supervisor Engine 1 units were programmed to 4.30 A. The 5.2(1) software overrides the
Supervisor Engine EEPROM (SEEPROM) value and uses a default of 3.00 A. The 5.2(2) software overrides the
SEEPROM value and uses a default of 1.70 A.
Supervisor Engine EEPROM (SEEPROM) value and uses a default of 3.00 A. The 5.2(2) software overrides the
SEEPROM value and uses a default of 1.70 A.
Because a standby Supervisor Engine card is always immediately powered on upon insertion, enough power must be
reserved in the redundant Supervisor Engine slot in order to accommodate a Supervisor Engine even if no card is
installed in the slot. There are four cases when you do and do not have a redundant Supervisor Engine:
reserved in the redundant Supervisor Engine slot in order to accommodate a Supervisor Engine even if no card is
installed in the slot. There are four cases when you do and do not have a redundant Supervisor Engine:
No card in slot 2—1.7 A are allocated for the possible insertion of a Supervisor Engine.
Page 5 of 9
Cisco - Power Management for Catalyst 6000 Series Switches
5/2/2006
http://www.cisco.com/warp/customer/473/142.html