Alcatel-Lucent 9500 MXC User Manual page 297

Function / Requirement
Ventilation
Maximum Ambient Temperature
Physical Stability
Power Supply
Power Graphic
Power Supply Location
Power Supply Compliance and
Loading
Grounding
3DB 23063 ADAA - Rev 004 July 2007
Description
IDUs have two redundant axial fans for cooling. IDUs must be located such
that unobstructed air passage is provide on each side for ventilation purposes.
A minimum of 50 mm (2") of side spacing to any rack panels or cable bundles
should be provided for this purpose.
The IDU is specified for a maximum ambient temperature (Tmra) of +45°
Celsius (113° Fahrenheit). The maximum ambient temperature (Tmra) of +45°
Celsius applies to the immediate operating environment of the IDU, which if
installed in a rack, is the ambient applying at its location within the rack.
Ensure that adding an IDU to a rack does not adversely impact the physical
stability of the rack.
The IDU has the +ve pin on its dc power supply connector connected directly
to the chassis.
It must be used with a -48 Vdc power supply which has a +ve ground; the
power supply ground conductor is the +ve supply to the IDU.
There must be no switching or disconnecting devices in the ground conductor
between the dc power supply and the point of connection to an IDU.
This triangle graphic is located adjacent to the power connector
on the front panel to signify that the +ve pin on the connector
is directly connected to the chassis.
The number is the fuse rating in amps.
The IDU must be installed in the same premises as its dc power supply and be
located in the same immediate area (such as adjacent racks or cabinets) as any
other equipment that is connected to the same dc power supply.
The dc power supply must be UL or IEC compliant for a -48 Vdc SELV output
(60 Vdc maximum).
Check to ensure that connection of a 9500 MXC system to an existing dc
supply does not overload the supply, circuit protection devices and wiring.
Where a new dc power supply is to be installed for an IDU, the power supply
must be rated to supply a minimum 5 A.
The IDU must be grounded to the station or master ground, which must be the
same ground as used for the dc power supply. Normally this is achieved by
grounding the IDU to the ground bar in its equipment rack or frame. This bar
is most often located to one side of the rack or at rack top or bottom. In turn,
the ground bar is grounded to the station ground
9500 MXC User Manual
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5A
Vol. III-4-3