19U QSFP SDR/DDR/QDR InfiniBand Switch Platform User’s Manual
Rev 1.7
Mellanox Technologies
23
3.2.2.1 Installing the Bottom Shelf
1. Select the location in the rack. Try to keep the chassis as low as possible to keep the center of
gravity low.
Choose which way you want the chassis to face in the rack. Keep in mind that one side of the chas-
sis can have up to 324 cables connected. The other side of the chassis will have power cables. The
distance between the rack and the door will be small on one side of the rack as opposed to the other
side of the rack.
Figure 11: Vertical Rails to Cabinet Measurement
Note: The side of the chassis with the power supply units will sit flush with the vertical supports
of the rack. The side of the chassis with the QSFP connectors will sit at the edge of the shelf
closer to the center of the rack.
Note: place the chassis as low as possible in the rack to keep the center of gravity as low as pos-
sible.
2. Insert four caged nuts into the rack on the side you plan to have the connectors. Note the U num-
ber on the rack.
Figure 12: Caged Nut Insertion
3. Screw the rail slides onto the rack.
