Cisco Carrier Routing System CRS-1 Installation Manual page 49

Chapter 2 Installing and Removing Power Components
The AC-powered chassis contains a single AC power shelf containing four AC power supplies. Each AC
power supply converts input AC power to the –54 VDC used by the Cisco CRS 4-slot line card chassis.
The AC power shelf is configured for single-phase AC power supply wiring (two wires + ground), and
is safety-rated at 110 to 240 VAC nominal, 50 to 60 Hz (4x) 11A.
For additional power details, see Cisco CRS Carrier Routing System 4-Slot Line Card Chassis System
Description, or in this document, see
System Specifications."
For complete information on regulatory compliance and safety, see Cisco CRS Carrier Routing System
Regulatory Compliance and Safety Information.
Prerequisites
Remove the air intake grille from the bottom of the chassis.
Required Tools and Equipment
You need the following tools and parts to perform this task:
•
•
•
Figure 2-23
Figure 2-23
OL-10971-10
ESD-preventive wrist strap
Medium flat-blade screwdriver
AC Power shelf (Cisco product number: CRS-4-AC-SHELF)
shows the AC power shelf.
AC Power Shelf
Cisco CRS Carrier Routing System 4-Slot Line Card Chassis Installation Guide
Appendix A, "Cisco CRS 4-Slot Line Card Chassis
Installing an AC Power Shelf
2-25