Specifications

9
Upgrading the 1200-Watt, AC-Input Power Supplies in the Cisco 7513
OL-6324-01
Product Overview
• Power supply shutdown—An out-of-tolerance voltage, current, or temperature condition was
detected within the power supply and it was shut down (or a shutdown is imminent). All DC power
remains disabled until the operator toggles the power switch and corrects the problem that caused
the shutdown (if any). This condition typically occurs because of one of the following reasons:
– Loss of AC input power (the power source failed).
– Power supply detected an overvoltage, overcurrent, AC or DC undervoltage, or overtemperature
condition within the power supply. This includes operator shutdown by turning off the system
power switch, which the power supply interprets as an undervoltage condition.
– The chassis interface detected an overtemperature condition within the system.
• Blower failure—The blower impeller has stopped turning. A warning message is displayed on the
console, and the system will continue operating until it shuts itself down due to overheating.
If the air temperature exceeds a defined threshold, the system processor displays warning messages on
the console terminal and, if the temperature exceeds the shutdown threshold, it shuts down the system.
The system stores the present parameter measurements for both temperature and DC voltage in
NVRAM, so that you can retrieve it later as a report of the last shutdown parameters.
The power supplies monitor internal power supply temperature and voltages. A power supply is either
within tolerance (Normal) or out of tolerance (Critical or Warning levels), as shown in Table 3. If an
internal power supply temperature or voltage reaches a critical level, the power supply shuts down
without any interaction with the system processor.
If the system detects that AC or DC input power is dropping, but it is able to recover before the power
supply shuts down, it logs the event as an intermittent power failure. The reporting functions display the
cumulative number of intermittent power failures logged since the last power up.
Table 2 Typical Processor-Monitored Temperature Thresholds
Parameter Normal High Warning High Critical Shutdown
Inlet 10–40 C 44 C 50 C –
Hotpoint 10–40 C 54 C 60 C –
Exhaust 10–40 C – – –
Processors – – – 70 C
Power supply – – – 75 C
Restart 40 C – – –
Table 3 Typical Power Supply-Monitored DC-Voltage Thresholds
Parameter Normal Low Critical Low Warning High Warning High Critical
+5V 4.74 to 5.26 4.49 4.74 5.25 5.52
+12V 10.20 to 13.8 10.76 11.37 12.64 13.24
–12V –10.20 to
–13.80
–10.15 –10.76 –13.25 –13.86
+24V 20.00 to 28.00 19.06 21.51 28.87 26.51