Sun Rack II Power Distribution Units User's Guide

Prepare to Install a Compact PDU

1. Determine where to install the PDU and the spring nuts for the mounting brackets.

   See:

   • Compact PDU Installation Locations

   • Mounting Bracket Screw and Spring Nut Locations

2. Unpack the PDU from its packaging and place it on a clean work table.

   Included with the PDU are two PDU mounting brackets, spring nuts, screws, and washers.

3. Open the rear door of the rack and determine where to install the PDU.

   Install compact PDUs from the bottom of the rack up. For more information, see Compact PDU Installation Locations.

4. Attach an antistatic strap to your wrist and to a 10 mm ESD grounding snap on the rack.

   See Attach an Antistatic Wrist Strap and Attach a Grounding Strap.

5. Use the rack template to locate where you will install the spring nuts in the rear rack frame channel.

   Hold the rack template up to the rear rack frame and mark where to install the spring nuts (labeled “Bracket Assembly Point” on the rack template).

   
   
6. Insert three spring nuts into the rear rack frame channel.

   Insert the spring nuts in the frame channel at a 45-degree angle. You use these spring nuts to secure the mounting brackets to the rack frame.

   
   
7. Move the spring nuts up or down the rack frame to the previously marked locations.

   Use the rack template or the illustration in Step 5 to determine the specific spring nut locations.

8. Using a T-25 Torx wrench key, secure the side mounting bracket to the rack by tightening two M5 screws with washers into the spring nuts.
   
9. Using a T-25 Torx wrench key, secure the top mounting bracket to the PDU using two screws and two washers.

   Ensure that the upturned side of the bracket faces the side of the PDU that contains the circuit breakers and standoff bolts.

   
   
10. Install a compact PDU into the rack.

    See Install a Compact PDU.