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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
How to Install or Remove Fixed Configuration Power Components
Note Although there are differences among the different fixed configuration PDU types (AC Wye, AC Delta,
and DC), they are installed in the same manner.
Note Although there are differences between the AC rectifier and DC PEM (AC Wye, AC Delta, and DC), they
are installed in the same manner.
Before Powering the Chassis Up or Down
While the line card chassis does not have a single power switch that powers the entire chassis and all its
components up and down, the AC rectifier or DC PEM linkage cuts power to the chassis as a whole when
both power components are turned off. Most components on the chassis, such as the power modules,
MSCs, PLIMs, and fan trays can be removed or installed in the chassis while it is running.
Before you can power the chassis up, perform the following steps:
Step 1 Install and wire the PDUs (see the “Installing a PDU” section on page 2-15).
Step 2 Install the DC PEMs or AC rectifiers (see the “Installing a DC PEM or AC Rectifier” section on
page 2-22).
Step 3 Install the RP card (see the “Installing an RP, PRP, or DRP Card” section on page 4-38).
Step 4 Activate your power source.
Step 5 Turn the PEM switches to the on position.
To power down the chassis entirely, you must power down each of the two DC PEMs or AC rectifiers;
you move each power switch to the off position by pulling it toward you. Both DC PEMs or AC rectifiers
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 Fixed Configuration Power System to Another
To convert a Cisco CRS 8-slot line card chassis with a fixed configuration power system from AC to DC
power, or from DC to AC power, perform the following steps:
Step 1 Power down the chassis completely. See the “How to Install or Remove Fixed Configuration Power
Components” section on page 2-13.
Step 2 Remove the DC PEMs or AC rectifiers. See the “Removing a DC PEM or AC rectifier” section on
page 2-23.
Step 3 Remove the PDUs. See the “Removing a PDU” section on page 2-17.
