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Cisco CRS-1 Carrier Routing System 8-Slot Line Card Chassis Installation Guide
OL-6256-08
Chapter 2 Installing and Removing Power Components
How to Install or Remove the Power Components
To power down the chassis entirely, you must power down each of the two power modules; you move
each power switch to the off position by pulling it toward you. Both power modules must be
disconnected or the PDUs unplugged to de-energize the chassis completely.
Note After powering off the AC rectifier, wait a minimum of 20 seconds before powering it on again.
Note All power cords must be unplugged from wall power to fully remove power from the chassis.
Converting from One Power System to Another
To convert a Cisco CRS-1 8-slot line card chassis from AC to DC power, or from DC to AC power, you
must:
Step 1 Power down the chassis completely. See the “Before Powering the Chassis Up or Down” section on
page 2-8.
Step 2 Remove the power modules. See the “Removing a Power Module” section on page 2-15.
Step 3 Remove the PDUs. See the “Removing a PDU” section on page 2-11.
Step 4 Install the new PDUs. See the “Installing a PDU” section on page 2-10.
If you are converting from AC to DC power, you must wire the PDU properly. See the “DC Power
Systems” section on page 2-4.
Step 5 Install the power modules. See the “Installing a Power Module” section on page 2-13.
Step 6 Power the chassis back up. See the “Before Powering the Chassis Up or Down” section on page 2-8.
Caution Use only one type of PDU and power module, either AC or DC, in a chassis at one time.
How to Install or Remove the Power Components
This section contains the following procedures:
• Installing a PDU
• Removing a PDU
• Installing a Power Module
• Removing a Power Module
Note Although there are differences among the different PDU types (AC Wye, AC Delta, and DC), they are
installed in the same manner.