Table 49: Power Supply LED
DescriptionStateColorLabel
Power supply is functioning normally, and input
voltage is within allowable operating range.
On steadilyGreenPS STATUS
Primary OTPOn steadilyYellow
Secondary OTPBlinking
Power supply is receiving input voltage below the
allowable operating range, but the redundant power
supply is functioning normally.
On steadilyRed
Power supply is receiving input voltage below the
allowable operating range and is not part of a
redundant configuration.
Off—
Related
Documentation
Connecting AC Power Cords to the MX104 Router on page 115•
• Connecting DC Power Cables to the MX104 Router on page 117
• MX104 AC Power Specifications on page 95
• MX104 DC Power Specifications on page 99
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.
63Copyright © 2017, Juniper Networks, Inc.
Chapter 6: Power System Components and Descriptions
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