Chapter 4 Installation and Maintenance
Power Supply Overview
Cisco SCE 2000 4xGBE Installation and Configuration Guide
4-12 OL-7824-04
The SCE 2000 is available in two power options:
• Dual line feed AC power — SCE 2000 is shipped with two appropriate AC power supply
cords.
• Dual line feed DC power — requires appropriate cables (hex or loop connectors) (see
Connecting the DC Power Supply).
The dual power supply units supply hot-swappable, redundant power. Redundant power is useful
as a failover; if a situation occurs where one power supply is down (for instance, a power supply
fails or a new power supply needs to be installed), the SCE 2000 can continue to run properly
using the other power supply.
Each power supply has fans that cool the power supply unit. These fans also help to cool the
internal components of the SCE 2000, as they direct the air flow to the outside through vents in
the rear of the power supply unit.
The faceplates of both power supplies have a handle, an on/off switch, and one captive installation
screw. An AC-input power receptacle is available on the AC-input power supply and a DC-input
terminal block is available on the DC-input power supply.
Note that the power supply units are asymmetrical, with a screw in only one corner of the unit.
Therefore, both power supply units can be fastened only if both units are inserted in the proper
orientation. This also prevents the accidental installation of one DC unit and one AC unit. (Refer
to the following figures).
The handle of the AC unit is at the bottom of the unit.
Figure 4-12: AC Power Module
The handle of the DC unit is at the top of the unit.
Figure 4-13: DC Power Module