Rack Mounting the Switch

This section discusses the following topics:
The accessory kit provides components for installing the switch in two-post and four-post racks.

The rack mounting procedure is identical for the 7504N and 7508N Series switches. Illustrations in this chapter depict the mounting of an unpopulated 8-slot chassis.

The 7512N and 7516N switches only require a different mounting shelf for the four-post rack. Illustrations in this chapter depict the mounting of an unpopulated 12-slot chassis and a 16-slot chassis.

After completing the instructions for your rack type, proceed to Cabling the Modular Switch.

7504N and 7508N Rack Mounting

Two-Post Rack Mount

To mount the switch to a two-post rack, assemble mounting brackets to the middle of the chassis, then attach the brackets to the rack. The switch does not support a front or rear mount into a two-post rack.

The accessory kit includes the following two-post mounting parts:
  • 2 - center-mount brackets
  • 20 - M4x8 pan-head Phillips screws

     

Attaching Mounting Brackets to the Chassis

  1. Orient the switch chassis and the two center-mount brackets (Figure 1).
    Position the flanges that attach to the rack posts toward the rear of the chassis.
  2. Attach both center-mount brackets to the chassis. Each bracket requires ten M4x8 pan-head Phillips screws.

     

    Figure 1. Attaching the Center-mount Brackets
    1 Center mount brackets        

     

Inserting the Switch into the Rack (7504N)

The rack mounting assembly is identical for all 7500N Series switches.
  1. Move the chassis to the rack using a mechanical lift.

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

  2. Lift the chassis into the rack. Position the flanges against the rack posts. See Figure 2.

     

    Figure 2. Lifting the Chassis into the Two-post Rack

     

  3. Select mounting screws that fit your equipment rack.
  4. A minimum of four screws is required on each side of the chassis. The accessory kit provides screws that fit many common equipment racks. When installing the switch into a rack with unthreaded post holes, nuts are also required to secure the switch to the rack posts.
  5. Attach the bracket flanges to the rack posts (Figure 3). Space the screws evenly along the flange.

     

    Figure 3. Attaching Flanges to the Rack Post

     

  6. After completing the two-post installation, proceed to Cabling the Modular Switch.

Four-Post Rack Mount

The switch is mounted onto a four-post rack by assembling a shelf into the rack and then placing the switch on the shelf.

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

The accessory kit provides the following four-post mounting parts:
  • 2 front brackets
  • 4 shelf supports
  • 2 back brackets (not needed for racks with threaded holes)
  • left shelf
  • right shelf

     

The Figure 4 display the front four-post mounting parts. The Figure 5 display the rear four-post mounting parts.

Assembling the Shelf (7504N and 7508N)

  1. Attach the front bracket and shelf support to the left front rack post, as shown in the "Left Front Post Assembly: Four-Post Rack Mount" image below.. An up arrow is printed on the shelf support to indicate its proper orientation.

    Unthreaded rack holes: Use the M6 screws and cage nuts supplied in the accessory kit.

    Threaded rack holes: Attach the front bracket to the post with screws that can be threaded through the rack post.

     

  2. Secure the shelf support to the post with nuts that fit the screws threaded through the post.

    7504N - Requires six M6 screws and cage nuts.

    7508N - Requires eight M6 screws and cage nuts.

     

    Figure 4. Left Front Post Assembly: Four-Post Rack Mount
    1 M6 cage nut 4 M6 nut 7 Front Bracket
    2 M6 nut 5 Switch Bottom 8 M6 screw
    3 Shelf support 6 Switch Top 9 Front rack post
     
  3. Repeat Step 1 on the right front rack post, assembling the parts at the same vertical level as those on the left rack post.
  4. Attach the shelf support and back bracket to the left rear post. The shelf support must be assembled on the front and rear posts at the same vertical level. An up arrow is printed on the shelf support to indicate its proper orientation.

    Unthreaded rack holes: Attach the parts as displayed in following figures.

    Threaded rack holes: Attach the shelf support to the post with screws that thread into the rack post. The back bracket is not required on threaded racks.

     

    Figure 5. Left Rear Post Assembly and Shelf Support Orientation
    1 Back bracket 2 M6 screw 3 Shelf support
    5 M6 screw 5 Rear rack post    

     

    1 Rear rack post 2 Front rack post 3 Shelf supports

     

  5. Adjust the left shelf by sliding its components to fit between the front left and rear left rack posts, as shown in Figure 6.
  6. Lift the left shelf above the shelf supports installed on the front left and rear left rack posts (Step 1 and Step 4). Align the holes and hook with the stubs on the brackets as shown in Figure 7. Lower the shelf so the bracket stubs are inserted into the shelf holes and hook.
  7. Press firmly on the shelf to ensure it is seated securely on the rack posts.
  8. Install the right shelf on the right front and rear rack posts by repeating Step 5 and Step 6 to obtain the rack configuration.

     

    Figure 6. Adjusting the Left Shelf
    1 Rear rack post 2 Left shelf 3 Front rack post

     

    Figure 7. Both Switch Shelves Installed
    1 Left shelf 3 Right shelf
    2 Rear rack post 4 Front rack post

     

Inserting the Switch into the Rack (7508N)

The rack mounting assembly is identical for the 7504N and 7508N switches. Illustrations in this chapter depict the mounting of an unpopulated 8-slot chassis.
  1. Move the chassis to the rack using a mechanical lift, as shown in the following figure.

     

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

     

     

  2. Lift the chassis into the rack.

     

    Figure 8. Lifting the Chassis

     

  3. Secure the chassis by tightening the thumbscrews on the front flanges into the rack posts, as shown in the following figure.

     

    Figure 9. Secure the Switch to the Rack Shelf

     

  4. After completing the two-post Installation, proceed to Cabling the Modular Switch.

7512N and 7516N Shelf Rack Mount Installation

The following discusses the rack mounting assembly procedure for the 7512N and 7516N Series switches.

Assembling the Shelf

  1. Remove the plastic alignment spacers for threaded racks and select the 3 mm diameter alignment pins.

     

    Figure 10. Alignment Spacer

     

     

    Figure 11. Rack Mount Shelf Orientation
    1 7512N Top (Front) 2 7516N Top (Front) 3 Rack (Rear - both switches)
    4 Cage nut locations 5 Switch Bottom    

     

    The following table lists the cage nut locations for the rack's front and rear switches.

     

    Table 1. Cage Nut Locations on the Rack
    Switch Cage Nut Locations
    7512N

    (Front of the rack)

    		 Top hole 1st U

    Middle hole 2nd U

    Middle hole 4th U

    Bottom hole 5th U

    Top hole 9th U

    Middle hole 15th U

    Middle hole 17th U
    7516N

    (Front of the rack)

    		 Top hole 1st U

    Middle hole 2nd U

    Middle hole 4th U

    Bottom hole 5th U

    Top hole 13th U

    Top hole 16th U

    Bottom hole 26th U

    Top hole 28th U
    7512N and 7516N

    (Rear of the rack)

    		 Top hole 1st U

    Middle hole 2nd U

    Middle hole 4th U

    Bottom hole 5th U
     
  2. Attach the front bracket of the shelf support to the left front rack post, as shown in the Figure 12. An up arrow is printed on the shelf support to indicate its proper orientation.

    Unthreaded rack holes: Use the M6 screws and cage nuts supplied in the accessory kit.

    Threaded rack holes: Attach the front bracket to the post with screws that can be threaded through the rack post.

     

  3. Hook the alignment pin to the bottom hole of the 6th U from the bottom, as shown.

     

    Figure 12. Left Front Post Assembly
    1 For the threaded rack, remove the plastic alignment spacer and use a 3 mm diameter alignment pin as shown.
    2 Hook the alignment pin to the bottom hole of the 6th U from the bottom.

     

    Repeat Step 1 and Step 3 on the right front rack post, assembling the parts at the same vertical level as those on the left rack post.

     

  4. Attach the shelf support and back bracket to the left rear post. The shelf support must be assembled on the front and rear posts at the same vertical level. An up arrow is printed on the shelf support to indicate its proper orientation.
  5. Unthreaded rack holes: Use the M6 screws and cage nuts supplied in the accessory kit.
  6. Threaded rack holes: Attach the shelf support to the post with screws that thread into the rack post.

     

    Figure 13. Left Rear Post Assembly and Shelf Support Orientation
    1 Install all four screws in the back.

     

  7. Lift the shelf above the shelf supports installed on the left and right rack posts (step 2 and step 3). Align the holes and hook with the stubs on the brackets. Lower the shelf so the shelf-support-bracket stubs are inserted into the shelf holes and hook.
  8. Rear: Fasten screws to all holes
    • Front: Fasten screws only where indicated with arrows (2x).
    • Rear: Fasten screws to all holes.

       

      Figure 14. Lower the Shelf into the Bracket Stubs

       

  9. Press firmly on the shelf to ensure it is seated securely on the rack posts.

Inserting the Switch into the Rack

The rack mounting assembly is identical for all 7500N Series switches. Illustrations in this chapter depict the mounting of an unpopulated 12-slot or 16-slot chassis.
  1. Move the chassis to the rack using a mechanical lift (Figure 15 shows the 12-slot).

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

     

    Figure 15. Lifting the 12-slot Chassis

     

  2. Carefully install the switch into the rack.

     

    Figure 16. Installing the Switch into the Rack

     

    Figure 17. Secure the Chassis to the Rack

     

  3. Ensure the rack kit is firmly installed.
  4. Secure the chassis by use of 10 rack screws attaching the ears of the chassis to the front flanges of the rack posts.
  5. After completing the Shelf Rack Mount Installation, proceed to Cabling the Modular Switch.