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Cisco ASR 1000 Series Aggregation Services Routers Hardware Installation Guide
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Chapter 8 Cisco ASR 1002 Router Overview and Installation
Cisco ASR 1002 Router Description
+24 VDC Power System Output for Cisco ASR 1002 Router
The +24 VDC power supply output tolerance is defined in
Table 8-6
under all combinations of +24 VDC
input line variation. Total system power consumption should not exceed 470 watts or output rating of
each power supply.
Note
Two power supplies are used for redundant operation. System total power consumption shall never
exceed rating of one power supply to maintain redundancy.
Note
Any combination of output voltage/currents cannot exceed total power rating of 470 Watts.
+24 VDC Power Supply Important Notices
The following items list important notes regarding the +24 VDC power supply in the Cisco ASR 1002
Router:
•
Output Voltage Alarm Threshold—The Output Voltage Alarm is declared when the output voltage
is below the low end of the minimum or above the high end of the maximum limits (as shown in
Table 8-7
). When the output voltage is above the high end of the minimum or below the low end of
the maximum limits, then the Red state is not activated.
•
Temperature—If a single fan fails, the power supply meets the functional requirements specified in
Table 24. Above 55°C with less than two fans, calculated MTBF does not apply; however all
component stress remains within the manufacturer’s specified rating.
•
Thermal Shutdown—The +24 VDC power supply will shut down to protect its components due to
excessive internal temperature. The +24 VDC power supply then automatically restarts if the
internal temperature returns to a safe operating level.
Table 8-6
Cisco ASR 1002 24 VDC Power System Output Voltage and Current
Output Voltage
+12 VDC
+3.3 V
Minimum
11.80
3.20
Nominal
12.00
3.30
Maximum
12.20
3.40
Output Current
Minimum
2.0 A
0.10 A
Maximum
39 A
3.125 A
Table 8-7
+24 VDC Output Voltage Alarm Threshold Ranges
Output
Minimum
Maximum
12V
10.0-11.2V
12.8-13.8V
3.3V
2.6 – 3.0V
None
