CHAPTER 6
Power System Components and
Descriptions
•
MX104 Power Overview on page 61
•
MX104 Power Overview on page 63
MX104 Power Overview
The MX104 router uses either AC or DC power supplies (see Figure 15 on page 62 and
Figure 16 on page 62). The power supplies are located in the front of the chassis and offer
1+1 redundancy. Each power supply has a handle, an ejection tab, and a status LED.
CAUTION: The router cannot be powered from AC and DC power supplies
simultaneously.
When two power supplies are present, they share power almost equally within a fully
populated system. If one power supply in a redundant configuration fails or is removed,
the remaining power supply assumes the entire electrical load without interruption. A
single power supply provides the maximum configuration with full power for as long as
the router is operational. A second power supply can be installed for redundancy. Each
power supply is cooled by its own internal cooling system.
Redundant power supplies are hot-removable and hot-insertable. When you remove a
power supply from a router that uses only one power supply, the router might shut down
depending on your configuration.
•
AC Power Supplies on page 61
•
DC Power Supplies on page 62
•
Power Supply LEDs on page 62
AC Power Supplies
Each AC power supply weighs approximately 2.5 lb (1.13 kg) and consists of a handle, a
power cord retainer clip, an ejection latch, an AC appliance inlet, a fan, and an LED to
monitor the status of the power supply. Figure 15 on page 62 shows the power supply.
61Copyright © 2017, Juniper Networks, Inc.
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