M160 Internet Router Hardware Guide
the Routing Engine finishes bootingand you need to power down the router
again, first issue the CLI request system halt command. For more information, see
“Disconnecting Powerfrom the Router” on page 200.
After a power supply is poweredon, it can take up to 60 seconds for status
indicators—such as LEDs on the power supply, showch assis commands, and
messages on the craft interface LCD—to indicate that the power supply is
functioning normally. Ignore error indicators that appear during the fi rst60 s econds.
See the following sections for furtherinformation:
Power Supply on page 36
Circuit Breaker Boxon page 38
Fuses on page 39
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 informationabout power
supply redundancy and replaceability, see Power System on page 35.
Each power supplyhas the following components (see Figure 17 and Figure 18):
LEDs—Indicate powersupply status. There is a green one labeled CB ON,a
blue one labeled OUTPUT OK, and an amber one label ed CBOFF.Theoriginal
power supply also has an amber LED labeled NO AIRFLOW. Table12 desc ribes
the LED states.
In addition, power supply failuretriggers the red alarm LED on the craft
interface and the RED ALARM relaycontact on the CIP. See “Alarm LEDs and
Alarm Cutoff/Lamp Test Button” on page 28.
Self-test button—Teststhe power supply. Do not press this button; itis for use
by qualified service personnel only.
36 Power System