Modular Configuration Power Architecture; Modular Configuration Dc Power - Cisco CRS-1 System Description

Cisco CRS 8-Slot Line Card Chassis Enhanced Router Power Systems

Modular Configuration Power Architecture

In the modular configuration power system, each DC power shelf accepts up to four PMs (power modules)
and each AC power shelf accepts up to 3 PMs. The power shelves and PMs are field replaceable. The power
shelves contain the input power connectors.
Note Depending on the hardware deployed at your site, your system may not consume the maximum power supplied
by the power system.
The modular configuration power module provides the following features:
• AC or DC power shelf redundancy
• PM load-share redundancy
• Elimination of power zone restriction, while maintaining zone protection
• Capacity for future growth
The modular AC and DC power systems use A and B power shelves to provide reliable, 2N redundant power
to all chassis components. See
with a modular DC configuration and
modular AC configuration.
All power modules in the modular power shelf power all zones. In addition, the modular power supplies work
in parallel with each other, and they can monitor power consumption, performance, analysis, and power
management concurrently.
Unlike the Cisco CRS 16-slot Line Card Chassis Enhanced router, the power shelf on the Cisco CRS 8-slot
Line Card Chassis Enhanced router does not contain an alarm module. Instead, alarm functionality is integrated
into the Route Processor (RP). The DC power module monitors power module status and processes alarm
functions. The AC or DC power module distributes power and passes power module status signals to the
system. Each power module has its own integrated fuse to protect the system, and each power module is
plugged into its own power outlet.
The Cisco CRS 8-Slot Line Card Chassis requires 8.0 kW of DC input power and 8.75 kW of AC input power
from the building supply.

Modular Configuration DC Power

The Cisco CRS 8-slot Line Card Chassis Enhanced router modular configuration DC power system can provide
up to 8,400 W to power the Line Card Chassis Enhanced router. The modular configuration DC power system
uses A and B power shelves to provide reliable, 2N redundant power to all chassis components.
Note Depending on the hardware deployed at your site, your system may not consume the maximum power supplied
by the power system.
If DC power to one modular configuration power shelf fails, the other power shelf provides enough power
for the chassis. This 2N power redundancy enables the routing system to operate in spite of single power
failure.
The following table summarizes the DC power system specifications for the Cisco CRS 8-Slot Line Card
Chassis.
#con_1237669/fig_1270022
#con_1241429/fig_1294667
Cisco CRS Carrier Routing System 8-Slot Line Card Chassis Enhanced Router System Description
Modular Configuration Power Architecture
for the 8-slot chassis power routing distribution
for the power routing distribution with a
21