Nortel Networks BCM200/400 - Manual (Page 35)

Chapter 2 Introducing the BCM hardware 35
BCM200/400 4.0 Installation and Maintenance Guide
Figure 2 BCM200 main unit internal components
Table 2 BCM200 main unit internal component descriptions
Component Description
Hard disk The programmed hard disk (or field redundancy upgrade) provides an additional hard
disk and redundant array of independent disks (RAID) controller card. See
“Hard disk”
on page 69 .
Power supply The auto-sensing power supply (standard) provides power to the main unit (see “BCM
power supply” on page 66 ).
Cooling fan The system cooling fan forces warm air out of the main unit (see “Cooling fan” on
page 71 ).
I/O card The I/O interface card provides a signal junction between the base function tray, hard
disk, power supply, and cooling system (see
“I/O interface card” on page 50 ).
MBM backplane The MBM backplane provides the MBM component interface to the power supply and
main card (see
“MBM bays and backplane” on page 52 ).
Removable cover The removable cover provides access to internal components.
Rear view
Power supply bay
Hard disk bay (removable panel)
Removable cover
Power supply
Hard disk
Fan
MBM backplane
I/O card
Front view
Fan exhaust
Rack-mount adapter
anchor points
MBM backplane
connectors