Cisco 7000 Hardware Installation And Maintenance page 29

To prevent injury, use both hands when installing or removing power supplies. Each
Warning
weighs 20 pounds.
On the router front panel, the upper power and lower power LEDs light when the power supply in
the corresponding bay is installed and supplying power to the system. Both the upper and lower
power LEDs should light in systems with redundant power. In addition to the front panel LEDs, each
power supply contains AC power and DC fail LEDs and individual power switches.
The green AC power LED on the power supply indicates that the supply is turned on and is receiving
input power.
The yellow DC fail LED is normally off, but lights if the power supply shuts down for any of the
following reasons:
•
Power-supply DC section failure, which could be caused by loss of power (input line failure or
operator turned off system power) or an actual failure in the power supply
•
Power-supply shutdown, initiated by the power supply because it detected an out-of-tolerance
temperature or voltage condition in the power supply
In systems with a single power supply, and in systems with redundant power when both power
supplies are being shut down, the DC fail LED lights momentarily as the system ramps down, but
goes out when the power supply has completely shut down. In systems with redundant power and
one power supply still active, the DC fail LED on the failed power supply will remain lit (powered
by the active supply).
The DC-input power supply LEDs include the input power LED and the out fail LED (located in the
same place as the two LEDs on the AC-input power supply). The green input power LED is on when
the input power is applied. The yellow out fail LED is normally off, but flashes at power on for a
lamp test.
The out fail LED lights if the power supply shuts down for either of the following reasons:
•
Power supply DC-output failure, which could be caused by loss of DC-input power (input line
failure or operator turned off system power) or an actual failure in the DC-input power supply
•
Power supply shutdown, initiated by the power supply because it detected an out-of-tolerance
temperature or voltage condition in the power supply
The power supplies are self-monitoring. Each supply monitors its own temperature and internal
voltages. For a description of power-supply shutdown conditions and thresholds, refer to the section
"Environmental Monitoring and Reporting Functions" in this chapter.
A modular power cable connects each power supply to the site power source. A cable retention clip
on the power supply AC receptacle prevents the cable from accidentally being pulled out. For
DC-input power supplies, you supply the power cable based on the specifications provided in
Table 1-1. For power supply installation procedures refer to the section "Installing Power Supplies"
in the chapter "Installing the Router."
Physical Description
Product Overview 1-25