Power Supply Module; Chassis Cover - 3Com NETBuilder II Installing Instruction

2-10 C 2: NETB
HAPTER UILDER

Power Supply Module

Switch/fuseholder/
receptacle assembly
location

Chassis Cover

II 8-S B /R
LOT RIDGE OUTER
1
2
3
4
Figure 2-10 8-Slot Chassis Backplane and Connectors
The power supply module (see Figure 2-10) consists of the power supply, a fan,
and a switch/fuseholder/receptacle assembly.
The autoranging power supply automatically adjusts the supply voltage to the
chassis for 115 and 230 VAC operation.
The switch/fuseholder/receptacle assembly is accessible from the lower
right-hand corner of the power supply on the 8-Slot chassis.
The AC power switch is marked according to international I/O convention:
When you press the I side, the switch is on; when you press the O side, the
switch is off.
The fuseholder cartridge provides access for fuse replacement. One fuse is
mounted in a removable cartridge. See page 2-12 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 LED indicates that all power supply outputs are
within acceptable limits.
The power supply module has a handle that makes it easy to remove and
replace. See page 2-11 for details on removing and replacing it.
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.
Connectors
Backplane
Power supply
8
7
6
5