Removing A Dc Power Shelf - Cisco Carrier Routing System CRS-1 Installation Manual

Removing a DC Power Shelf

Figure 2-18
1 Chassis air filter
2 Air intake grille
Install the inlet grille. See the
Step 15

Removing a DC Power Shelf

This section describes how to remove a DC power shelf from the Cisco CRS 4-slot line card chassis. The
DC power shelf is comprised of both the DC power input shelf and the DC power input module (PIM).
The DC power shelf encloses four power supplies and the power distribution connections and wiring
blocks.
The DC power input shelf is in the front of the chassis; the power input module (PIM) is in the rear of
the chassis.
Sequence of Tasks
The sequence of tasks required to remove the DC power shelf is as follows:
1.
2.
3.
4.
5.
6.
7.
Cisco CRS Carrier Routing System 4-Slot Line Card Chassis Installation Guide
2-20
Chassis Air Filter
Bring down all power to the chassis.
Disconnect the input power cables.
Disconnect the grounding cable.
Remove the air intake (inlet) grille.
Remove all DC power supplies.
Remove the DC power input shelf.
Remove the DC power input module (PIM).
3 Power tray and power supplies
4 Power tray air filter
"Installing the Inlet Grille" section on page
Chapter 2 Installing and Removing Power Components
5-1.
1
2
3
4
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