3Com NETBuilder II, Инструкция по установке, Страница: 19 / 82

Chassis Description 1-9
Figure 1-10 shows the location of the backplane, connectors, and power supply
in the 4-Slot chassis.
Figure 1-10 4-Slot Chassis Backplane and Connectors
Power Supply Module The power supply module (see Figure 1-10) consists of the power supply, two
fans, and a switch/fuseholder/receptacle assembly.
The autoranging power supply automatically adjusts the supply voltage to the
chassis for 115 and 230 VAC operation.
Switch/fuseholder/
receptacle assembly
location
The switch/fuseholder/receptacle assembly is accessible from the back of the
4-Slot chassis.
The fuseholder cartridge provides access for fuse replacement: One fuse is
mounted in a removable cartridge. See page 1-12 for information on replacing
the fuse.
The international CEE-22 AC power receptacle is approved for 6 amp operation.
The connector has three prongs with chassis ground on the middle prong. All
systems are shipped with power cords; if your power cord does not match your
requirements, contact your network supplier for assistance.
The power supply module can be removed and replaced easily. See page 1-10
for details on removing and replacing it.
Chassis Cover The chassis cover is secured with five screws on the back of the chassis and six
screws on each side (three for rack-mounting and three that secure the cover).
CAUTION: Before turning the system on, make sure that the cover is properly
secured. Turning on a system without the cover in place can result in
overheating of the system and will invalidate the warranty.
Power
supply
1
2
4
3
O I
Backplane Connectors