M320 Power Supply Leds; Figure 18: Dc Power Supply; Table 12: Power Supply Led - Juniper M320 Hardware Manual

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M320 Power Supply LEDs

Table 12: Power Supply LED

Label Color
Blue
OUTPUT OK
Copyright © 2010, Juniper Networks, Inc.
Each DC power supply has a single DC input (-48 VDC and return) that requires a
dedicated 60 A (–48 VDC) circuit breaker. For information about site power preparations,
see "Site Electrical Wiring Guidelines for M Series, MX Series, and T Series Routers" on
page 249. For information about connecting the router to power and ground, see
"Connecting Power to a DC-Powered M320 Router" on page 97.
For DC power supply and power system electrical specifications, see "M320 DC Power
Electrical Specifications" on page 255

Figure 18: DC Power Supply

M320 Power System Description on page 33
Grounding the M320 Router on page 95
Maintaining the M320 Power Supplies on page 122
Replacing an M320 DC Power Supply on page 196
The LED on each power supply faceplate indicates the status of the power
OUTPUT OK
supply (see Table 12 on page 35 , which applies to the AC and DC power supply). The
power supply status is also reflected in two LEDs on the craft interface (see "M320 Craft
Interface Power Supply LEDs" on page 31). In addition, a power supply failure triggers
the red alarm LED on the craft interface.
State Description
Off No power applied to power supply.
Blinking Power supply blinks for 5 seconds after initial power on.
Power supply is installed, but not powered on, and is receiving bias power from
a powered on power supply.
Input voltage is invalid.
Power supply has failed.
On steadily Power supply is functioning normally.
Chapter 2: M320 Hardware Components
35