Mx480 Router Hardware And Cli Terminology Mapping; Mx480 Chassis Description - Juniper MX480 Hardware Manual

Power supplies—In the low-line (110 V) AC power configuration, the router contains three or four AC
power supplies, located horizontally at the rear of the chassis in slots PEM0 through PEM3 (left to right).
Each AC power supply provides power to all components in the router. When three power supplies are
present, they share power almost equally within a fully populated system. Four AC power supplies
provide full power redundancy. If one power supply fails or is removed, the remaining power supplies
instantly assume the entire electrical load without interruption. Three power supplies provide the
maximum configuration with full power for as long as the router is operational.
In the high-line (220 V) AC power configuration, the router contains two or four AC power supplies
located horizontally at the rear of the chassis in slots PEM0 through PEM3 (left to right). Each AC power
supply provides power to all components in the router. When two or more power supplies are present,
they share power almost equally within a fully populated system. Four AC power supplies provide full
power redundancy. If one power supply fails or is removed, the remaining power supplies instantly
assume the entire electrical load without interruption. Two power supplies provide the maximum
configuration with full power for as long as the router is operational.
In the DC configuration, two power supplies are required to supply power to a fully configured router.
One power supply supports approximately half of the components in the router, and the other power
supply supports the remaining components. The addition of two power supplies provides full power
redundancy. If one power supply fails or is removed, the remaining power supplies instantly assume the
entire electrical load without interruption. Two power supplies provide the maximum configuration with
full power for as long as the router is operational.
Cooling system—The cooling system has redundant components, which are controlled by the host
subsystem. If one of the fans fails, the host subsystem increases the speed of the remaining fans to
provide sufficient cooling for the router indefinitely.

MX480 Router Hardware and CLI Terminology Mapping

The MX480 router supports the components in
Table 5: MX480 Router Hardware Components and CLI Terminology
Component
Chassis
Craft Interface Panel
Hardware Model Number
CHAS-BP-MX480
CRAFT-MX480-S
Table 5 on page 33.
CLI Name Description
MX480 "MX480 Router Physical Specifications" on
page 178
"MX480 Chassis Description" on page 30
Front Panel "MX480 Craft Interface Description" on
Display page 36
33