Troubleshooting The Dc-Input Power Subsystem - Cisco XR 12410 Installation Manual

Troubleshooting the Power Subsystem

Troubleshooting the DC-Input Power Subsystem

Cisco XR 12410 Router Installation Guide
4-8
Ilim—Indicates the power supply is operating in a current-limiting condition.
•
Make sure that each power cord is connected to a dedicated AC power
–
source.
Each AC power supply operating in the nominal range of 200 to 240 VAC
–
requires a minimum service of 20 A, North America (or 13 A,
international).
Because the AC-input power subsystems use redundant power supplies, a problem
with the DC output voltage to the backplane from only one power supply should
not affect router operation. When the router is equipped with two AC power
supplies, it powers on and operates even if one power supply fails.
DC-input power supplies are monitored for internal temperature, voltage, and
current load by the MBus module on the alarm cards, and by the master MBus
module on the RP. If the router detects an extreme condition, it generates an alarm
on the alarm card and logs the appropriate warning messages on the console.
Figure 4-2 identifies the components of a DC PEM.
Chapter 4 Troubleshooting the Installation
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