Cisco CEE 7/7 - IEC-C19 13-ft Europe CAB-CEE77-C19-EU= 用户手册

When removing a component, use any available ejector levers or captive installation screws to 
release the bus connectors from the backplane or midplane.

Handle carriers by available handles or edges only; avoid touching the printed circuit boards or 
connectors.

Place a removed component board-side-up on an antistatic surface or in a static shielding container. 
If you plan to return the component to the factory, immediately place it in a static shielding 
container.

Avoid contact between the printed circuit boards and clothing. The wrist strap only protects 
components from ESD voltages on the body; ESD voltages on clothing can still cause damage. 

Never attempt to remove the printed circuit board from the metal carrier.

For safety, periodically check the resistance value of the antistatic strap. The measurement should be 
between 1 and 10 megohm (Mohm).

This section provides module power requirements and heat dissipation specifications for the 
Catalyst 4500 E-series switches. You should verify site power before you install the switch. 

For more information about power management and planning, refer to the “Environmental Monitoring 
and Power Management” chapter in the Catalyst 4500 Series Switch Cisco IOS Software Configuration 
Guide version appropriate for your software.

Knowing the power requirements is useful for planning the power distribution system needed to support 
the switches. You should consider the heat dissipation specifications when estimating the 
air-conditioning requirements for an installation. For all Catalyst 4500 series switches, supervisor 
engines, and switching modules in AC or DC environments see the Catalyst 4500 Series Module 
Installation Guide at:

4 

Catalyst 4500 E-series supervisor engines and switching modules are discussed elsewhere in this book.

This section provides guidelines for connecting the Catalyst 4500 E-series switch AC power supplies to 
the site power source. Basic guidelines include the following:

Make sure each chassis power supply has its own dedicated branch circuit.

Size the circuits according to local and national codes.

If you are using a 200/240 VAC power source in North America, use a two-pole circuit breaker to 
protect the circuit.

Place the source AC outlet within 6 feet (1.8 meters) of the system and make sure it is easily 
accessible.