Hardware Redundancy Of Acx5400 Router Components And Functionality; Acx5400 Routers Hardware And Cli Terminology Mapping - Juniper ACX5448-D Hardware Manual

NOTE: Before removing the optical transceivers, we recommend that you disable the interface
using the set interfaces interface-name disable command.

Hardware Redundancy of ACX5400 Router Components and Functionality

The following hardware components provide redundancy on ACX5400 routers:
Power supply modules (PSMs)—The ACX5400 routers have two PSMs. Each PSM provides power to all
components in the router. If two PSMs are installed, they provide full power redundancy to the device.
If one PSM fails or if you remove one PSM, then the second PSM balances the electrical load without
interruption.
To provide power redundancy to the system, both PSMs must be installed. Connect the first power
source feed to one PSM and the other power source to the second PSM.
CAUTION:
input terminal.
Cooling system—The ACX5400 routers have six fan modules. If a fan module fails and is unable to keep
the router within the desired temperature thresholds, chassis alarms occur and the router can eventually
shut down. The router can work with one failed fan module for a long duration, but for the router to
work efficiently you must replace the failed fan module immediately.

ACX5400 Routers Hardware and CLI Terminology Mapping

Table 6 on page 28 describes the hardware terms used in ACX5400 router documentation and the
corresponding terms used in the Junos OS command line interface (CLI).
Do not connect both the power source feeds to the same power supply
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