Juniper Networks M160 manual Power Supply

M160 Internet Router Hardware Guide

the Routing Engine finishes booting and you need to power down the router again, first issue the CLI request system halt command. For more information, see “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, show chassis commands, and 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 on page 36

Circuit Breaker Box on 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 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):

LEDs—Indicate power supply status. There is a green one labeled CB ON, a blue one labeled OUTPUT OK, and an amber one labeled CB OFF. The original power supply also has an amber LED labeled NO AIRFLOW. Table 12 describes the LED states.

In addition, power supply failure triggers the red alarm LED on the craft interface and the RED ALARM relay contact on the CIP. See “Alarm LEDs and 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.

36 Power System