Dc Power Supplies - Cisco 12410 Installation And Configuration Manual

Chapter 1 Cisco 12010, Cisco 12410, and Cisco 12810 Series Router Overview
Physical and Functional Description of Router

DC Power Supplies

A DC powered router consists of two (2400 W or 2800 W) DC PDUs and
DC PEMs. DC power to the router is provided from cables from a DC power
source that are connected to threaded DC-input terminal studs on the chassis rear
panel as shown in Figure 1-5.
Figure 1-5 DC Input Terminal Connections—2400 W
-48/60V
-48/60V
(-)
RTN
(+)
Ground
The terminal studs are labeled on the PDU and a clear plastic cover (not shown)
fits over the studs to protect the connections.
Each DC PEM operates from a nominal source DC voltage of –48 to –60 VDC
and requires a dedicated 60-amp service.
The status LEDs on a DC PEM provide information about the current operational
status of the power supply. For example, the LEDs on a 2400 W DC PEM provide
following information (Figure 1-6):
Cisco 12010, Cisco 12410, and Cisco 12810 Router Installation and Configuration Guide
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