Cisco CRS-1 System Description page 33

Cisco CRS 8-Slot Line Card Chassis Enhanced Router Power Systems
Modular Configuration DC Power Shelf
The DC modular configuration power shelf is the enclosure that houses the DC power modules and power
distribution connections and wiring. The power shelf (see
#con_1282820/fig_1274845
from the front and plugs into the chassis power interface connector panel.
Each modular configuration DC power shelf requires up to four DC input feeds of either –48 VDC (nominal),
50 A or –60 VDC (nominal), 40 A. The power shelf accepts input DC power in the range –40 to –72 VDC.
Each terminal consists of two M6 threaded studs, 0.6 inches long, and centered 0.625 inches apart. The
terminals have a safety cover.
Each DC power shelf supports up to four power modules, and accepts one 60 A battery feed per power module.
Input DC power enters the power shelf and is processed by the power modules before being distributed to the
chassis midplane. The power modules perform inrush current limiting, EMI filtering, surge protection, and
circuit isolation on the input DC power, and then distribute the power via the internal bus bar in the chassis
midplane.
Modular Configuration DC Power Module
Each DC power module provides 2100 Watts. The DC power module, shown in
Configuration DC Power Module .
the AC power module. Power modules are field-replaceable.
Figure 13: Modular Configuration DC Power Module .
One–48/–60 VDC input enters the power module at the rear of the power shelf, and exits the power module
and is distributed to the chassis midplane.
for rear view) installs in the Cisco CRS 8-slot Line Card Chassis Enhanced router
passes the power via the internal bus bar to the system and is similar to
Cisco CRS Carrier Routing System 8-Slot Line Card Chassis Enhanced Router System Description
Modular Configuration DC Power Shelf
#con_1282820/fig_1274839
Figure 13: Modular
for front view and
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