3com 4005 Installation Instruction
Power Supply Features
31
AC and DC LEDs
When the power supply, power cord, and power source are all functioning
normally, both LEDs on a power supply are lighted. If one or both LEDs are not
lighted, see the section “Troubleshooting a Power Supply” in this chapter.
normally, both LEDs on a power supply are lighted. If one or both LEDs are not
lighted, see the section “Troubleshooting a Power Supply” in this chapter.
No ON/OFF Switch
There is no ON/OFF button on power supplies or anywhere on the Switch 4005
chassis. The mains power cord serves as the power disconnect. The power supply
receives power as soon as you connect the power cord to a mains outlet.
chassis. The mains power cord serves as the power disconnect. The power supply
receives power as soon as you connect the power cord to a mains outlet.
Power Cords
The type of power cord that is used to connect a power supply to a mains outlet
depends on your country location. If you did not receive the correct type of power
cord in the shipping box, contact your supplier or 3Com.
depends on your country location. If you did not receive the correct type of power
cord in the shipping box, contact your supplier or 3Com.
Autosensing Capability
Switch 4005 power supplies have autosensing capability. This means that each
power supply can automatically sense the type of input voltage to which it is being
connected at the electrical outlet. Thus, although countries around the world
differ in their standard input voltage, the same power supply can function
everywhere.
power supply can automatically sense the type of input voltage to which it is being
connected at the electrical outlet. Thus, although countries around the world
differ in their standard input voltage, the same power supply can function
everywhere.
How Two Supplies
Operate
When two power supplies are installed, they operate in a load-sharing manner.
This means that each power supply provides an equal amount of the load current.
This is done so that if one power supply fails, the other power supply can
immediately provide all required power and network activity is not disrupted.
This means that each power supply provides an equal amount of the load current.
This is done so that if one power supply fails, the other power supply can
immediately provide all required power and network activity is not disrupted.
Maintenance
Ensure that the immediate area around the Switch 4005 is free from dust or small
debris and that the side and rear vents are unobstructed. There are no
user-serviceable parts on a power supply.
debris and that the side and rear vents are unobstructed. There are no
user-serviceable parts on a power supply.
If Failure Occurs
If a power supply failure occurs and a second power supply is installed, Switch
activity is not disrupted. If a second power supply is not installed, then Switch
activity is immediately halted.
activity is not disrupted. If a second power supply is not installed, then Switch
activity is immediately halted.
If a power supply fails, remove it as described in “Removing a Power Supply” in
this chapter and return the components to your supplier. Consult your purchase
records so that you can determine if the incident occurred during the warranty
period.
this chapter and return the components to your supplier. Consult your purchase
records so that you can determine if the incident occurred during the warranty
period.
Hot Swap
If you have two power supplies installed and at least one is operating normally,
you can remove and replace the other power supply while the chassis continues to
be powered on. This activity is called hot swap. It does not interfere with Switch
4005 operation.
you can remove and replace the other power supply while the chassis continues to
be powered on. This activity is called hot swap. It does not interfere with Switch
4005 operation.
For more information about power requirements for the chassis, see “Power
Requirements” on page 18.
Requirements” on page 18.