Table 17. DC power requirements
Parameter Specifications
Minimum and maximum input voltage
NOTE: For more information, see Power supplies.
–40 VDC to -60 VDC
Maximum current at full load with fan without PoE 550W DC PSU:
● N3224T-ON: 11.5 A @ 48 V
● N3224F-ON/E3224F-ON: 11.5 A @ 48 V
● N3248TE-ON: 11.5 A @ 48 V
● N3248X-ON: 11.5 A @ 48 V
1300W DC PSU:
● N3224P-ON: 28 A @ 48 V
● N3248P-ON/E3248P-ON: 28 A @ 48 V
● N3224PX-ON: 28 A @ 48 V
● N3248PXE-ON/E3248PXE-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 about how to
derive the available PoE budgets based on the PSUs you use.
PoE load condition—high-line AC input
N3208PX-ON Max PoE power:
● One internal PSU: 193 W
● One internal PSU + one external power adapter: 493 W
● One internal PSU + two external power adapters: 793 W
N3224P-ON Max PoE power:
● One internal PSU: Can meet 720 W
Max PoE power shall be no more than 720 W for 24 ports x 30 W per port.
N3224PX-ON Max PoE power:
● One internal PSU: 1260 W
● Two internal PSUs: Can meet 2400 W
● One internal PSU + at least 1 x 2000 W or 2 x 1050 W in MPS-3S shelf: Can meet 2400 W
(1)
[Note: One internal PSU power
+ MPS-3S PSUs power) * 0.85 - N3224PX-ON maximum system power consumption > 2400 W]
Max PoE power shall be no more than 2400 W for 24 ports x 99.99 W per port.
(1)
The maximum PoE power reduces if you connect the MPS-3S shelf to more than one PoE switch.
N3248P-ON/E3248P-ON Max PoE power:
● One internal PSU: 813 W
● Two internal PSUs: Can meet 1440 W
● One internal PSU + any one PSU in MPS-3S shelf: Can meet 1440 W
(1)
[Note: (One internal PSU power + MPS-3S PSUs
power) * 0.85 - N3248P-ON/E3248P-ON maximum system power consumption > 1440 W]
Max PoE power shall be no more than 1440 W for 48 ports x 30 W per port.
(1)
The maximum PoE power reduces if you connect the MPS-3S shelf to more than one PoE switch.
N3248PXE-ON/E3248PXE-ON Max PoE power:
● One internal PSU: 1056 W
● Two internal PSUs: 2496 W
● Two internal PSUs + 1 x 2000 W PSU in MPS-1S shelf: 3663 W
● One internal PSU + at least 3 x 1600 W PSUs in MPS-3S shelf: Can meet 4800 W
(1)
[Note: (One internal PSU power +
MPS-3S PSUs power) * 0.85 - N3248PXE-ON/E3248PXE-ON maximum system power consumption > 4800 W]
● Two internal PSUs + at least 2 x 1600 W PSUs in MPS-3S shelf: Can meet 4800 W
(1)
[Note: (Two internal PSUs power +
MPS-3S PSUs power) * 0.85 - N3248PXE-ON/E3248PXE-ON maximum system power consumption > 4800 W]
82
Specifications
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