Install Guide

Table 14. DC power requirements (continued)
Parameter Specifications
● N2248PX-ON: 28 A @ 48 V
PoE Budget Specifications
The following details the PoE budget specifications for high-line and low-line AC inputs and general guidelines on how to derive
the available PoE budgets based on the PSUs you use.
PoE load condition—high-line AC input
N2224PX-ON Max PoE power:
● One internal PSU: 812 W
● Two internal PSUs: Can meet 1080 W
● One internal PSU + any one PSU in MPS-3S shelf: can meet 1080 W
(1)
[Note: (One internal PSU power + MPS-3S PSU(s)
power)* 0.85 - N2224PX-ON maximum system power consumption > 1080 W]
Maximum PoE power shall be no more than 1080 W for 12 ports x 30 W per port + 12 ports x 60 W per port.
(1)
The maximum PoE power reduces if you connect the MPS-3S shelf to more than one PoE switch.
N2248PX-ON Max PoE power:
● One internal PSU: 1274 W
● Two internal PSUs: can meet 2160 W
● One internal PSU + at least one x 1600 W or any two PSUs in MPS-3S shelf: can meet 2160 W
(1)
[Note: (One internal PSU
power + MPS-3S PSU(s) power) * 0.85 - N2248PX-ON maximum system power consumption > 2160 W]
Maximum PoE power shall be no more than 2160 W for 24 ports x 30 W per port + 24 ports x 60 W per port.
(1)
The maximum PoE power reduces if you connect the MPS-3S shelf to more than one PoE switch.
PoE load condition—low-line AC input
N2224PX-ON Max PoE power:
● One internal PSU: 712 W
● Two internal PSUs: Can meet 1080 W
● One internal PSU + any one PSU in MPS-3 shelf: can meet 1080 W
(1)
[Note: (One internal PSU power + MPS-3S PSU(s)
power) * 0.85 - N2224PX-ON maximum system power consumption > 1080 W]
Max PoE power shall be no more than 1080 W for 12 ports x 30 W per port + 12 ports x 60 W per port.
(1)
The maximum PoE power reduces if you connect the MPS-3S shelf to more than one PoE switch.
N2248PX-ON Max PoE power:
●
One internal PSU: 624 W
● Two internal PSUs: 1479 W
● Two internal PSUs + any PSU in MPS-1S shelf: 2096 W
● One internal PSU + any three PSUs in MPS-3S shelf: can meet 2160 W
(1)
[Note: (One internal PSU power + MPS-3S PSU(s)
power) * 0.85 - N2248PX-ON maximum system power consumption > 2160 W]
● Two internal PSUs + any two PSUs in MPS-3S shelf: can meet 2160 W
(1)
[Note: (Two internal PSUs power + MPS-3S
PSU(s) power) * 0.85 - N2248PX-ON maximum system power consumption > 2160 W]
Max PoE power shall be no more than 2160 W for 24 ports x 30 W per port + 24 ports x 60 W per port.
(1)
The maximum PoE power reduces if you connect the MPS-3S shelf to more than one PoE switch.
General Guidelines on PoE budget calculations
PoE budget for the N2224PX-ON and N2248PX-ON switches
● One internal PSU: PSU1 power output: Internal PSU power output - maximum system power consumption
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Specifications