印刷

7800 Series - Rack Mounting the Switch 印刷

Rack Mounting the Switch

This section discusses the following topics:

DCS-7804, DCS-7808, DCS-7812, DCS-7816, and DCS-7816L Rack Mounting

The accessory kit provides components for installing the switch in four-post racks. The accessory kit includes the following four-post mounting parts:
  • Cradle assembly
  • M6 pan-head Phillips screws
  • M6 rack cage nuts (optional)
  • Template for non-threaded racks requiring rack nuts

     

     

    Note: Two-post rack mount is not supported.

     

Illustrations in this chapter depict the mounting of an unpopulated 8-slot chassis.

After completing the instructions for your rack type, proceed to Cabling the Power Supplies.

Perform the following tasks to mount the switch in a four-post rack:

Inserting Rack Nuts Using the Template

Note: Required only for non-threaded racks that use rack nuts. Installation is referenced with the bottom screw located at the 1RU location. For a different starting point for the bottom screw, always start at an RU location, and ensure there is enough room for your device in the rack.

 

  1. Attach the template supplied with your switch to the front left post so that the top and bottom locations for the rack nuts line up with the RU locations required by your device.
  2. Insert rack-mount cage nuts required by the switch (Table 1) at the locations identified by the Figure 1 using the template.

     

    Note: The number of cage rack nuts required for the front left and front right rack posts is different. The rear posts require the same number (4 each).

     

     

    Note: If the system includes the four rack nuts, distinct from the others as shown in the following figure, place them in the lowest positions on both the front and rear rack rails. The locations are indicated by an orange highlight and a star.
    Figure 1. Cage Rack Nut Locations

    Technical assembly diagram showing vertical rack rails. Orange highlights and star icons indicate specific holes on the front and rear rails where cage nuts must be inserted, aligned with the 1RU starting position.
     
    1 Mounting location A Front (Left and Right) 4 Mounting location D Front (Left and Right)
    2 Mounting location B Front (Left and Right) 5 Mounting location Rear (Left and Right)
    3 Mounting location C Front (Left and Right)    

     

    The following figure shows the rack mount locations for the switches.
    Figure 2. Rack Mount Locations

    A complex diagram displaying a vertical rack column, with front (F, left) and rear (R, right) views. Several long, thin strips, marked with tick marks, run the height of the column. Specific locations along these strips are numbered 1 (A), 2 (B), 3 (C), 4 (D), and 5, using leader lines. Perspective views of two smaller bracket components are visible at the very top and bottom.
    Table 1. Rack Mount Locations and Screws Required by Switch
    Mounting Location1 DCS-7804 DCS 7808 DCS-7812 DCS-7816
    Front (L) Front (R) Front (L) Front (R) Front (L) Front (R) Front (L) Front (R)
    A 5 5 5 5 5 5 5 5
    B N/A N/A N/A N/A 3 3 4 4
    C N/A N/A N/A N/A N/A N/A 2 3
    D 1 2 1 2 1 2 2 2

    1. Rear post locations are indicated by the template and are used for securing the cradle.

     

Inserting and Securing the Cradle Assembly

Insert and secure the cradle assembly to the rack using the following steps.

 

Note: The rack mounting cradle is shipped nested upside down over the top of the chassis for all switches. A protective film on the top and sides prevents the cradle from scratching the chassis during transport.

 

  1. Insert two screws loosely in the two front rack posts at the same level and two in the back two rack posts 3 RU above the front screws (Figure 3). Use the template for racks requiring rack nuts (Figure 4). The front locations are marked with single dots, and the rear locations with two dots.

     

    Figure 3. Attaching Mounting Screws to the Rack Posts

    Illustration of four vertical rack rails. Arrows point to specific locations where four starting screws are partially driven into the rails, leaving a 4 mm gap to allow the cradle notches to engage.

     

     

    Figure 4. Mounting (Starting Screws) Locations for Cradle (Front and Rear)

    Numbered diagram (1 through 5) identifying the exact mounting holes on front and rear rack posts for the cradle. Locations for the front are marked with single dots, and rear locations with double dots.
     
    1 Bottom of switch 4 Rear Screw (Left)
    2 Front screw (Right) 5 Rear Screw (Right)
    3 Front Screw (Left)    

     

  2. Prior to installation, buckle the straps on the cradle together so the left and right sides are angled slightly inwards.

     

    Figure 5. Buckling the Straps

    Diagram of the metal server rack cradle with side panels angled slightly inward. Large arrows show the direction of compression, and a central yellow strap is buckled to hold the shape during installation.

     

  3. Pull out the rear sliding rails slightly beyond the back rack posts.
  4. Insert the cradle so that the notches in the cradle engage behind the loosely mounted front screws.
  5. Slide the rear sliding rails back in so that they are flush with the back rack posts, the notches in the cradle engage behind the loosely mounted screws, and the bottom of the cradle is horizontal and level.

     

    Figure 6. Inserting the Cradle

    Assembly diagram showing the rack cradle being moved into position. A magnifying inset detail shows the cradle's U-shaped bracket slot being lowered onto a pre-installed screw head on the rack rail.

     

  6. Release the clasp on the connector to rotate the left and right sides so they are vertical.

     

    Figure 7. Aligning the Cradle in the Rack

    Technical diagram showing the cradle fully seated. Arrows indicate the ends of the yellow security strap being folded over the top edges of the vertical side panels to finalize alignment.

     

  7. Secure the cradle to the rack posts using the eight remaining screws, two more in the front and six more in the back, for a total of twelve screws.

     

    Figure 8. Securing the Cradle in the Rack

    Diagram showing the rack cradle fully mounted. Numbered dashed lines and a screwdriver icon illustrate the insertion of 12 total screws into front and rear rails to lock the cradle in place.

     

Inserting the Switch into the Rack

Mount the switch onto a four-post rack by assembling a rack-mount cradle into the rack. Then, place the switch on the cradle and secure it to the rack.
  1. Move the chassis to the rack using a mechanical lift.

     

    Note: If modules are inserted into the chassis, use the lift carefully to avoid damaging any components.

     

  2. Lift the chassis and insert it into the rack. For the DCS-7816 chassis, remove the lifting brackets from the top of the chassis, which are required to lift the chassis from the pallet onto a transport lift before insertion.

     

    Note: A platform lift is recommended for transportation and installation.

     

    Figure 9. Lifting the Chassis

    Isometric view showing a large silver modular switch chassis being supported from behind by a blue wheeled mechanical lift. The lift's platform is inserted into the base of the chassis to safely move it into the rack.

     

  3. Secure the chassis by tightening additional M6 screws on the front flanges into the rack posts.

     

    Note: Additional screws depend on the device. The 7804 and 7808 chassis require nine.

     

     

    Figure 10. Secure the Switch to the Rack Shelf

    Technical illustration of the server chassis seated on the rack shelf. Dashed lines show screws being driven through the front and rear mounting flanges into the vertical rack rails using a screwdriver.

     

  4. After completing the Four-Post Installation, proceed to Cabling the Power Supplies.
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