Power Supply - Juniper Internet Router M160 Hardware Manual

M160 Internet Router Hardware Guide
the Routing Engine finishes booting and you need to power down the router
again, first issue the CLI
"Disconnecting Power from the Router" on page 200.
After a power supply is powered on, it can take up to 60 seconds for status
indicators—such as LEDs on the power supply,
messages on the craft interface LCD—to indicate that the power supply is
functioning normally. Ignore error indicators that appear during the first 60 seconds.
See the following sections for further information:

Power Supply

The router has two load-sharing, pass-through power supplies, located at the
bottom rear of the chassis, as shown in Figure 2. For information about power
supply redundancy and replaceability, see Power System on page 35.
Each power supply has the following components (see Figure 17 and Figure 18):
36
Power System
request system halt
Power Supply on page 36
Circuit Breaker Box on page 38
Fuses on page 39
LEDs—Indicate power supply status. There is a green one labeled
blue one labeled
OUTPUT OK
power supply also has an amber LED labeled
the LED states.
In addition, power supply failure triggers the red alarm LED on the craft
interface and the
RED ALARM
Alarm Cutoff/Lamp Test Button" on page 28.
Self-test button—Tests the power supply. Do not press this button; it is for use
by qualified service personnel only.
command. For more information, see
show chassis
, and an amber one labeled
NO AIRFLOW
relay contact on the CIP. See "Alarm LEDs and
commands, and
, a
CB ON
. The original
CB OFF
. Table 12 describes