Power Component Information Common To The Two Types Of Power Systems; Basic Chassis Power Details - Cisco SRS Series Installation Manual

Power Component Information Common to the Two Types of Power Systems

provide load-share redundancy. The modular configuration power system also includes SNMP MIBS and
XML support.
Note
In a modular configuration AC power system, PDU refers to the Cisco CRS PDU which is required to convert
3-phase AC-Wye or AC-Delta input power to single-phase AC input power for the modular configuration
AC power shelf. For further information, see the
Guide
Power Component Information Common to the Two Types of
Power Systems
This section introduces information shared by the fixed configuration power components and the modular
configuration power components in the following topics:

• Basic Chassis Power Details

• Bonding and Grounding Guidelines
• DC Power Systems
• AC Power Systems
Basic Chassis Power Details
The LCC can be configured with either an AC-input power subsystem or a DC-input power subsystem. Site
power requirements differ, depending on the source voltage used. Follow these precautions and
recommendations when planning power connections to the router:
• Check the power at your site before installation and periodically after installation to ensure that you are
• Install proper grounding to avoid damage from lightning and power surges.
The LCC requires that at least one power shelf and its components be installed to operate properly; however,
if you install only one power shelf and its components, your system will not be 2N redundant.
Two types of power shelves exist: an AC shelf and a DC shelf. A fixed configuration AC power shelf houses
the AC rectifiers, while a fixed configuration DC power shelf houses the DC PEMs. A modular configuration
AC power shelf houses the AC PMs, while a modular configuration DC power shelf houses the DC PMs. It
is required that you use only one type of power shelf in a chassis at a time.
Note In a modular configuration power system, both AC and DC power supplies are referred to as power modules
(PMs).
Cisco CRS Routers 16-Slot Line Card Chassis Installation Guide
16
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receiving clean power. Install a power conditioner, if necessary.
Installing and Removing Power Components
Cisco CRS 3-Phase AC Power Distribution Unit Installation