Cisco 7200 VXR User Manual page 54

Field-Replaceable Units
The DC-input power supply has DC-input power leads that are hardwired to a
DC-input terminal block. A cable tie is shipped with each DC-input power supply
to secure the leads to the power supply faceplate and provide strain relief for the
leads.
Caution To ensure adequate airflow across the router power supplies, a power
supply or a power supply filler plate must be installed in each power
supply bay. Figure 1-4 shows a Cisco 7206VXR with an installed
power supply filler plate.
Table 1-1, earlier in this chapter, lists the AC-input and DC-input power supply
system power specifications, including input voltage and operating frequency
ranges.
Note Each AC-input power supply operating at 120 VAC requires a
minimum of 5A service. We recommend powering the
Cisco 7206VXR from a 15A receptacle at the power source.
Note Each DC-input power supply operating at –48 VDC in North
America requires a minimum of 13A service. Each DC-input power
supply operating at –60 VDC in the European Community requires
a minimum of 8A service.
This product relies on the building's installation for short-circuit
(overcurrent) protection. Ensure that a listed and certified fuse or
circuit breaker, 20A minimum 60 VDC, is used on all
current-carrying conductors.
The power OK LED goes off and the power supply shuts itself down when the
internal DC voltages exceed allowable tolerances or the internal temperature of
the power supply exceeds allowable tolerances. The power supply remains in a
shutdown state until it is disconnected and reconnected to the source power, and
then restarted with the power switch. The power switch turns the power supply on
and starts the system. For a description of power supply shutdown conditions and
thresholds, see the "Environmental Monitoring and Reporting Functions" section
on page 1-64.
Cisco 7200 VXR Installation and Configuration Guide
1-54
Chapter 1 Cisco 7200 VXR Product Overview
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