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How To Select A Power Supply For Cisco Catalyst 4500e
Series Switches
Cisco Catalyst 4503 + Supervisor Engine IV + 2x
10/100/1000 PoE = 304W Data Power (96 x class 3 PDs) /
89% = 1661W PoE Power
Total Power required = 1661W + 304W = 1965W
Order the 4200WAC Power Supply.
PoE device classifications:
Table 3.
PoE Device Classifications
PoE Class
Watts
0/3
15.4*
1
4*
2
7*
*Power required at the port divide by 89% for power supply output
Watts required.
Multi-Input Supplies Explained
Dual-Input 4200wac
The 4200W power supply is designed to accept either
a 100V or a 200VAC circuit. Customers planning large-
scale PoE deployments can use the inputs in the 200V
mode. Customers planning for the future can deploy the
4200W supply with as little as one 100V circuit.
Table 4.
Power Input Mapping
Mode
Input 1
Input 2
PoE
Watts
1
100V
OFF
922
2
100V
100V
1850
3
200V
OFF
1850
4
200V
200V
3700
1400WDC-P Power Input Options
The 1400WDC-P power supply has two operating
modes. The default data-only mode and the inline power
mode. When inline power is selected, the supply can
provide up to 8600W of power to the chassis (data and
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PoE). This is enough power to support a fully loaded
Cisco Catalyst 4510 with all class 3 devices. This power
can come from a variety of sources, including the AC
power shelf or an AC-powered DC UPS.
An AC-powered DC UPS is powered by standard com-
mercial power and outputs -48VDC to the 1400WDC-P
supply. When compared with a standard AC UPS this
solution is more efficient, produces less heat, takes
up less space, and provides longer run times than a
standard AC UPS. The AC-powered DC UPS requires
only a single AC/DC conversion compared to three in
an AC UPS.
Figure 2.
UPS Design
AC UPS
AC / DC
DC / AC
AC / DC
Cat 4500
Data
Max
Watts
Watts
660
1050
For More Information
1400
2100
http://www.cisco.com/en/US/products/hw/switches/
1400
2100
ps4324/products_data_sheet09186a00801f3dd9.html
1400
4200
Less Heat
DC UPS
AC / DC
Less Power
Less Cost
More Uptime
14000W DC-P
Cat 4500
At-A-Glance
C45-435515-00 10/07