2-20
Cisco 7600 Series Router Installation Guide
OL-4503-26
Chapter 2 Preparing for Installation
Site Requirements
Table 2-20
provides a sample calculation of power and heat dissipation for the following router
configuration:
•
Cisco 7603 Router chassis (including AC-input power supplies)
•
One WS-X6K-S2U-MSFC2 supervisor engine
•
Two 4-port OC-12 POS modules
Power Requirements
Warning
Read the installation instructions before connecting the system to the power source.
Follow these requirements when preparing your site for the router installation:
•
The redundant power option provides a second, identical power supply to ensure that power to the
chassis continues uninterrupted if one power supply fails or input power on one line fails.
•
In systems configured with the redundant power option, connect each of the two power supplies to
a separate input power source. If you fail to do this, your system might be susceptible to total power
failure due to a fault in the external wiring or a tripped circuit breaker.
•
To prevent a loss of input power, be sure that the total maximum load on each circuit supplying the
power supplies is within the current ratings of the wiring and breakers.
Table 2-19
Power Requirements and Heat Dissipation—Miscellaneous Modules
Model Number/
Module Type
Module
Current (A)
@ 42 VDC
Module
Power
(Watts)
AC
DC
AC-Input
Power
(Watts)
Heat Diss.
(BTU/HR)
DC-Input
Power
(Watts)
Heat Diss.
(BTU/HR)
WS-X6066-SLB-APC
Content Switching Module
3.0
126.0
157.5
537.9
169.35
578.35
Table 2-20
Sample Calculation of Router Configuration
Model Number/
Module Type
AC-Input
Power
(Watts)
DC-Output
Power
(Watts)
Heat Diss.
(BTU/HR)
Input Current
90 VAC
(Amps)
120 VAC
(Amps)
180 VAC
(Amps)
240 VAC
(Amps)
Cisco 7603 Router chassis
(with fans)
88
34
302
0.98
0.74
0.49
0.37
WS-X6K-S2U-MSFC2
182
145
620
2.02
1.57
1.01
0.76
OSM-4OC12-POS-MM
OC-12 module 4-port
502
402
1714
5.58
4.18
2.78
2.10
Total
751
565
2565
8.35
6.26
4.16
3.14