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.
Ta b l e 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
Ta b l e 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
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