Mx480 Ac Power Supply Leds; Table 14: Ac Power Supply Leds - Juniper MX480 Hardware Manual

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MX480 AC Power Supply LEDs

Table 14: AC Power Supply LEDs

Label Color
Yellow
AC OK
Green
Green
DC OK
Red
PS FAIL
Copyright © 2011, Juniper Networks, Inc.
power supplies 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. The low-line configuration requires three power supplies and the fourth
power supply provides redundancy. With high-capacity power supplies, you must have
a minimum of three power supplies installed in the router.
In the high-line (220 V) AC power configuration, the MX480 router contains two or
four AC power supplies (see
the chassis in slots PEM0
configuration, 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 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 two-PEM
high-line configuration, slots
configuration requires two power supplies, with the third and fourth providing
redundancy. With high-capacity power supplies, you must have a minimum of two
power supplies installed in the router.
MX480 Chassis Description on page 7
MX480 Power System Description on page 32
MX480 AC Power Supply LEDs on page 35
Each AC power supply faceplate contains three LEDs that indicate the status of the
power supply (see Table 14 on page
LEDs on the craft interface. In addition, a power supply failure triggers the red alarm LED
on the craft interface.
State Description
Off AC power input voltage is below 78 VAC.
On AC power input voltage is within 78–264 VAC.
Off DC power outputs generated by the power supply are not within the normal
operating ranges.
On DC power outputs generated by the power supply are within the normal operating
ranges.
Off Power supply is functioning normally.
On Power supply is not functioning normally and its output voltage is out of regulation
limits. Check
Figure 17 on page 34), located horizontally at the rear of
through PEM3 (left to right). In a high-line AC power
PEM0 and PEM1 or PEM2
35). The power supply status is also reflected in two
and LEDs for more information.
AC OK DC OK
Chapter 2: MX480 Hardware Components
and PEM3 are used. The high-line
35