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Installing Cage Nuts (If Needed) for M320 Open Frame Racks

For racks without threaded holes, you must install cage nuts in the locations specified in M320 Mounting Hole Locations for Four-Post Racks or Cabinets. To install the cage nuts:

1. On the front rack rails, install cage nuts in the holes specified for the large shelf.
2. On the rear rack rails, install cage nuts in the holes specified for the small shelf.

Installing the Large Mounting Shelf for the M320 Open-Frame Racks

1. On the rear of each rack rail, partially insert a mounting screw into the lowest hole specified in M320 Mounting Hole Locations for Open-Frame Racks for the large shelf.
2. Install the large shelf on the rack. Rest the bottom slot of each ear on a mounting screw.
3. Partially insert screws into the open holes in the ears of the large shelf.

Installing the Small Mounting Shelf for the M320 Open-Frame Racks

1. On the front of each rack rail, partially insert a mounting screw into the lowest hole specified in M320 Mounting Hole Locations for Open-Frame Racks for the small shelf.
2. Install the small shelf on the rack. Rest the bottom slot of each ear on a mounting screw. The small shelf installs on the front of the rails, extending away from the rack. The bottom of the small shelf should align with the bottom of the large shelf
3. Partially insert screws into the open holes in the ears of the small shelf.
4. Tighten all the screws completely.

Moving the Adjustable Center-Mounting Brackets for M320 Open-Frame Racks

The router has two adjustable center-mounting brackets that are initially attached to the mounting holes closest to the rear of the chassis. You can move the pair of adjustable center-mounting brackets to one of 11 positions on the side of the chassis. The mounting holes for connecting the mounting brackets to the chassis are spaced 0.984 in. (25 mm) apart.

To move the adjustable center-mounting brackets to a different location on the side of the chassis:

1. Loosen the three screws at the top and bottom of each bracket (see Removing the Adjustable Center-Mounting Brackets for M320 Four-Post Racks or Cabinets).
2. Align each mounting bracket with the mounting holes on the chassis that correspond to your rack mounting option.
3. Insert the three screws at the top and bottom of each mounting bracket, tightening each partway.
4. Tighten all the screws completely.