Overview
30
Director 2/140 Installation Guide
Fan Modules
Three fan modules, each containing one system fan (three system fans total),
provide cooling for director FRUs, as well as providing redundancy for continued
operation if a fan fails.
The fan module can be replaced while the director is powered on and operating,
provided the module is replaced within 10 minutes (after which software powers
off the director). An amber LED for each fan module turns O
N
if one or more fans
fail or rotate at insufficient velocity.
SBAR Assembly
The director ships with two SBAR assemblies. The active SBAR is responsible for
Fibre Channel frame transmission from any director port to any other director
port. Connections are established without software intervention. The assembly
accepts a connection request from a port, determines if a connection can be
established, and establishes the connection if the destination port is available. The
assembly also stores busy, source connection, and error status for each director
port.
The backup SBAR takes over operation if the active assembly fails, and provides
the ability to maintain connectivity and data frame transmission without
interruption. The transition to the backup assembly is transparent to attached
devices.
Each SBAR assembly consists of a card and steel carriage that mounts flush on
the backplane. The carriage provides protection for the back of the card,
distributes cooling airflow, and assists in aligning the assembly during installation.
The rear of the carriage contains a green LED that turns O
N
if the assembly is
operational and active, and an amber LED that turns O
N
if the assembly fails. The
amber LED F
LASHES
if FRU beaconing is enabled.
AC Module
The AC module is located at the bottom rear of the director. Either AC module can
be replaced while the director is powered on and operational. The module
provides:
■
Two single-phase, 220 VAC, power connectors.
■
An input filter and AC system harness (internal to the FRU) that provides the
wiring to connect the AC power connectors to the power supplies (through the
backplane).
