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Cisco Nexus 5000 Series Hardware Installation Guide
Chapter 1 Overview
Cisco Nexus 5500 Platform Switches
Caution
All of the power supply and fan modules in the same chassis must use the same airflow direction or an
error will occur with possible over heating and shut down of the switch. If you power up the switch with
more than one airflow direction, you must power down the switch and replace the modules with the
wrong airflow direction (modules not taking in coolant air from the cold aisle) before powering up the
switch.
Figure 1-24
shows the 750W DC power supply. For specifications for this power supply, see
Table B-10
on page B-4
. For more information on the LEDs, see
Table D-1 on page D-2
Figure 1-24
750 W DC Power Supply for the Cisco Nexus 5500 Series Switch
Table 1-2
Power Supplies for the Cisco Nexus 5500 Platform switches
Part Number
Power Supply
N55-PAC-750W
Cisco Nexus 5548P/5548UP PSU Front-to-Back (port-side exhaust) Airflow
module, A/C, 100-240V, 750W
N55-PAC-750W(=)
Cisco Nexus 5548P/5548UP PSU Front-to-Back (port-side exhaust) Airflow
module spare, A/C, 100-240V, 750W
N55-PAC-750W-B
Cisco Nexus 5548UP PSU Back-to-Front (port-side intake) Airflow module,
A/C, 100-240V, 750W
N55-PAC-750W-B(=)
Cisco Nexus 5548UP PSU Back-to-Front (port-side intake) Airflow module
spare, A/C, 100-240V, 750W
N55-PDC-750W
Cisco Nexus 5548P/5548UP PSU Front-to-Back (port-side exhaust) Airflow
module, D/C, -40 to -72VDC, 750W
N55-PDC-750W(=)
Cisco Nexus 5548P/5548UP PSU Front-to-Back (port-side exhaust) Airflow
module spare, D/C, -40 to -72VDC, 750W