Power Supplies - Cisco 7200 VXR User Manual

Chapter 1 Cisco 7200 VXR Product Overview
The port adapters installed in the Cisco 7200 VXR routers support OIR. For an explanation of OIR, see
Note
the
All port adapters and service adapters connect to two Peripheral Component Interconnect (PCI) buses
on the router midplane. The PCI buses provide a path to packet I/O memory and the system
(route/switch) processor. The Fast Ethernet port on the I/O controller connects to a third PCI bus for
packet routing and switching. The port or service adapters either provide such services as compression
or encryption, or they provide network interfaces to connect the router to external networks.
Detailed instructions for removing, replacing, and configuring the port adapter types supported on the
Note
Cisco 7200 VXR routers are contained in the configuration note for the port adapter. For example, if you
plan to replace a 4-port Ethernet port adapter in your Cisco 7200 VXR router, refer to the configuration
note PA-4E Ethernet 10BaseT Port Adapter Installation and Configuration. This configuration note
accompanies every PA-4E port adapter that is shipped from the factory as an installed item in a
Cisco 7200 VXR router or as a FRU. The configuration note is also available on the Documentation
CD-ROM and on Cisco.com.
To ensure adequate airflow across the router's port adapters, a port adapter or a blank port adapter must
Caution
be installed in each port adapter slot.

Power Supplies

The Cisco 7200 VXR routers come equipped with one 280W AC-input power supply. (A 280W
DC-input power supply is available as an option.) You must order the second power supply separately.
A second power supply, although not required, allows load sharing and increased system availability.
The Cisco 7200 VXR power supplies are the same as in all Cisco 7200 series routers.
Note
Do not mix power supplies in Cisco 7200 VXR routers. In dual power supply configurations, both power
Caution
supplies must be of the same type (two AC-input power supplies or two DC-input power supplies).
Note Detailed instructions for handling and replacing the Cisco 7200 series power supplies are contained in
the configuration notes 280-Watt AC-Input Power Supply Replacement Instructions and 280-Watt
DC-Input Power Supply Replacement Instructions. These configuration notes accompany every 280W
AC-input power supply and every 280W DC-input power supply that is shipped from the factory as a
FRU. These configuration notes are also available on the Documentation CD-ROM and on Cisco.com.
A handle on the AC and DC power supplies provides a grip point for removing and replacing the power
supply.
of the DC-input power supply.) Two captive installation screws secure the power supply to the chassis
and seat the power supply in the router midplane. A power OK LED indicates that the power supply is
delivering +5 VDC to the router midplane.
78-5469-04 B0
"Online Insertion and Removal" section on page
(Figure 1-26 shows the faceplate of the AC-input power supply.
1-53.
Figure 1-27
Cisco 7200 VXR Installation and Configuration Guide
Field-Replaceable Units
shows the faceplate
1-45