Cisco Systems UCSEZINFRACHSS manual Fan Modules, Power Supplies, Buttons and Connectors

Overview

Fan Modules

Fan Modules

The chassis can accept up to eight fan modules (N20-FAN5). A chassis must have filler plates in place if no fan will be installed in a slot for an extended period.

LEDs

There is one LED indication of the fan module’s operational state. See Interpreting LEDs, on page 25 for details.

Buttons and Connectors

No buttons or connectors are on a fan module.

Power Supplies

Different power supplies are available to work with the AC (N20-PAC5-2500W) or DC (UCSB-PSU-2500DC48) versions of the chassis. To determine the number of power supplies needed for a given configuration, use the Cisco UCS Power Calculator tool.

LEDs

Two LEDs indicate power connection presence, power supply operation, and fault states. See Interpreting LEDs, on page 25 for details.

Buttons

There are no buttons on a power supply.

Connectors

The power connections are at the rear of the chassis on the PDU, with different types for AC or DC input. Four single-phase, hot-swappable power supplies are accessible from the front of the chassis. These power supplies can be configured to support non-redundant, N+1 redundant, and grid-redundant configurations.

Power Supply Redundancy

Power supply redundancy functions identically for AC and DC configured systems. When considering power supply redundancy you need to take several things into consideration:

•Power supplies are all single phase and have a single input for connectivity to customer power source (a rack PDU such as the Cisco RP Series PDU or equivalent).

•The number of power supplies required to power a chassis varies depending on the following factors:

Cisco UCS 5108 Server Chassis Installation Guide

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