While the boards can be inserted in any position in the rack, we recommend, whenever
possible, leaving an empty slot between each pair of boards inserted in the rear panel to
facilitate connection and disconnection of the cables and ventilation (by convection in
BC2000DF-3 chassis).
Other characteristics and features.
In the case of a BC2000DF-3 chassis, the ventilator fans are mounted so that they can be hot-
swapped. To be able to hot-swap the fans, the rack must be mounted on extractor rails.
The backpanel or connection board is completely passive, which eases maintenance.
Backpanel breakdowns or failures are highly improbable and can only occur for mechanical
reasons.
General characteristics.
- Dimensions: 4 U x 19 “ (482 mm x 176 mm x 450 mm).
- Approximate weight: 10,500 grams.
2.1. Ventilation units.
For dense setups with several BC2000DF-3 type racks, it’s necessary to install forced
ventilation units for a better system cooling. There are 3 kinds of ventilation units, depending
on if there are 6 frontal ventilation fans (BC 2000 FAN DOWN), 6 rear ventilation fans (BC 2000
FAN UP) or 6 frontal and 6 rear ventilation fans (BC 2000 FAN MIDDLE).
In a system with several racks placed vertically, one unit of first type (as indicated by its name)
will be placed in the lower part of the system for air insertion and one unit of second type will be
placed at the top of the system for hot air extraction; in addition, between each pair of racks one
unit of third type will be placed in order to extract hot air from the lower rack and insert cold air
in the upper one.
Each ventilation unit has 1 unit high and is feeded with 48 volts DC through a connector with
SPEAKON type interlock. Approximate consumption is 2 watts for simple units and 4 watts for
double units.
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