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Cisco CRS Carrier Routing System 8-Slot Line Card Chassis Installation Guide
OL-6256-17
Chapter 2 Installing and Removing Power Components
Power Component Information Common to Two Types of Power System
Figure 2-2 Ground Cables Attached to Chassis Grounding Points
DC Power Systems
Each DC powered chassis contains two fixed configuration PDUs or two modular configuration power
shelves for 2N redundancy.
• In the fixed configuration power system, each PDU accepts one DC PEM for 2N redundancy. The
PDUs and PEMs are field replaceable. The PDUs contain the input power connectors.
• In the modular configuration power system, each power shelf accepts up to four DC PMs. The power
shelves and DC 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.
Fixed Configuration DC Power
The Cisco CRS 8-slot line card chassis DC power system provides 7,500 watts to power the chassis. Each
DC PDU is connected to three pairs of DC power feeds and powers a single DC PEM. Input DC power
enters the PDU and is passed to the PEM, which provides power to the components in the chassis.
• Each DC PEM has its own circuit breaker.
• The fixed configuration power system distributes power in power zones.
• The DC PDUs and DC PEMs are field replaceable.
1 NEBS bonding and grounding points (inside chassis)
2 NEBS bonding and grounding points (outside chassis)
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