Dell EMC PowerProtect DD9400, Installation Manual

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Figure 12. Installing the rear end of the rail
5. For the front end piece, rotate the latch outward and pull the rail forward until the pins slide into the flange, and release the
latch to secure the rail in place.
Figure 13. Installing the front end of the rail
6. Repeat the preceding steps to install the right rail assembly.
Secure the rail assemblies to the cabinet
The supplied screws and washers are used to secure the rail assemblies to the front and rear of the cabinet.
About this task
NOTE: For square hole cabinets, install the supplied conical washer before installing the screw. For unthreaded round hole
cabinets, install only the screw without the conical washer.
Steps
1. Align the screws with the designated U spaces on the front and rear rack flanges.
Ensure that the screw holes on the tab of the system retention bracket are seated on the designated U spaces.
Install the System in the Rack 21