Cisco Systems XR 12416 Instalační manuál stáhnout pdf (Strana 6)

Chapter 1 Product Overview

Physical and Functional Description of Router

1-6

Cisco XR 12416 Router Installation Guide

OL-13833-01

Optional AC Power Shelf

The power subsystem consists of a double-level AC-input power shelf with bays

for 4 AC-input power supplies. Figure 1-4 shows the optional power shelf. It

attaches to the top of the router chassis and is secured to the chassis the same way

as the standard AC-input power shelf.

Note A router equipped with the optional AC-input power subsystem stands 77.5 inches

(196.85 cm) tall and does not fit in a standard 7-foot (2.1 m) rack.

The 4 power supplies in the optional power shelf participate in an N+2 redundant

current-sharing scheme in which current sharing is divided among all 4 power

supplies. Up to two power supplies can fail and the system can continue to operate

temporarily, (depending on your system configuration) using the remaining two

power supplies. Failed supplies should be replaced as soon as possible to ensure

full redundancy.

Caution To ensure that the chassis configuration complies with the required power

budgets, use the on-line power calculator. Failure to properly verify the

configuration may result in an unpredictable state if one of the power units fails.

Contact your local sales representative for assistance.

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Cisco Systems XR 12416 Instalační manuál Strana 6