Specifications

8
Upgrading the 1200-Watt, AC-Input Power Supplies in the Cisco 7513
OL-6324-01
Product Overview
• A spring clip on the AC receptacle supplies strain relief and prevents the power supply power cable
from being pulled out accidentally.
Environmental Monitoring and Reporting Functions
The environmental monitoring and reporting functions, controlled by the chassis interface board, enable
you to maintain normal system operation by identifying and resolving adverse conditions prior to loss
of operation. The environmental monitoring functions constantly monitor the internal chassis air
temperature and DC supply voltages and currents. Each power supply monitors its own voltage and
temperature and shuts itself down if it detects a critical condition within the power supply. If conditions
reach shutdown thresholds, the system shuts down to avoid equipment damage from excessive heat. The
reporting functions periodically log the values of measured parameters so that you can retrieve them for
analysis later, and the reporting functions display warnings on the console if any of the monitored
parameters exceed defined thresholds.
In addition to monitoring internal temperature and voltage levels, the system also monitors the blower.
If the blower fails, the system displays a warning message on the console. If the blower is still not
operating properly after two minutes, the system shuts down to protect the internal components against
damage from excessive heat.
Environmental Monitoring
Three sensors on the Route Switch Processor (RSP2) monitor the temperature of the cooling air that
flows through the processor slots: inlet, hotpoint, and exhaust. The sensors are located at the bottom,
center, and top of the RSP2, when facing the interface processor end of the chassis and viewing the RSP2
as it is installed.
The power supply uses the Normal, Critical, and Warning levels to monitor DC voltages. Table 2 lists
temperature thresholds for the three processor-monitored levels. Table 3 lists the DC power thresholds
for the Normal and Critical (power-supply-monitored) levels.
• Normal—All monitored parameters are within normal tolerances. The system blower operates at
55 percent of its maximum speed if the internal air temperature does not exceed this level.
• Warning (low and high)—The system is approaching an out-of-tolerance condition. The system will
continue to operate, but operator monitoring or action is recommended to bring the system back to
a normal state. If the internal air temperature the normal range, the blower speed will increase
linearly from 55 percent of maximum speed until it reaches 100 percent speed at 33 C (91 F).
• Critical (low and high)—An out-of-tolerance temperature or voltage condition exists. The system
may not continue operation. If a voltage measurement reaches this level, the power supply can shut
down the system. If the blower fails, the system will display a warning message and shut down in
two minutes. Immediate operator action is required.
• Processor shutdown—The chassis interface has detected a temperature or blower-failure condition
that could result in physical damage to system components and has disabled DC power to all
interface processors (in slots 0 through 5 and 8 through 12). DC power to the RSP2, chassis
interface, and blower stays on, but no RSP2-related processing takes place. Immediate operator
action is required. DC power remains off until the inside temperature of the chassis reaches 40 C
(104 F), at which point the system will restart up to 15 times (if required). If the source of the
shutdown has not been corrected, the system will execute a hard shutdown. Before any shutdown,
the system logs the status of monitored parameters in NVRAM so that you can retrieve it later to
help determine the cause of the problem.