and attachment of a local monitor, keyboard, and mouse to the management
module.
3438 mm
135.35"
Figure 9. Operational clearances for NetBAY 42 Enterprise rack
Noise considerations
Each BladeCenter unit has two blowers for cooling. An optional Acoustics Module is
available that dampens the noise generated by the blowers. Table 3 shows the
maximum sound levels emitted by BladeCenter units without the Acoustics Module
and with the Acoustics Module. This represents the minimum and maximum number
of BladeCenter units that can be installed in a 42U rack.
42
BladeCenter Type 8677: Planning and Installation Guide
Table 3. BladeCenter noise emissions
Number of
BladeCenter units
per rack
Without Acoustics
1
Module
With Acoustics
1
Module
Without Acoustics
4
Module
With Acoustics
4
Module
Without Acoustics
6
Module
With Acoustics
6
Module
NetBay
NetBay
NetBay
Rack C
Rack B
Rack A
Front
3850 mm
151.57"
Maximum sound
power idle
7.4 bels
6.9 bels
8 bels
7.5 bels
8.2 bels
7.7 bels
914 mm
35.98"
1524 mm
60.00"
Maximum sound
power operating
7.4 bels
6.9 bels
8 bels
7.5 bels
8.2 bels
7.7 bels