Installing Standard PDUs

Prior to installing the standard PDUs into your rack, prepare the work area and assemble the following tools:

T-25 Torx wrench key (included in the Sun Rack II shipping kit)
T-30 Torx wrench key (included in the Sun Rack II shipping kit)
PDU mounting brackets and M6 screws (included in the PDU shipping kit)
Cable routing support brackets and M6 screws (included in the PDU shipping kit)
M5 shipping screws and washers (included in the PDU shipping kit)

You also need to supply:

Antistatic wrist strap
Tie wraps

Clean work table, or area, near the rack

Caution - Because of the their size and weight, you will need another person to help lift and install the PDU into the rack (see Standard PDU Physical Specifications to review the size and weights of each PDU). You might also need additional help when routing the PDU power input cables.

Install a Standard PDU Into the Rack

Unpack the PDU from its packaging and place it on a clean work table.
Included with the PDU are two PDU mounting brackets, a cable routing bracket, screws, and washers.
Open the rear door of the rack and determine where you will install the PDU.
You can install up to two PDUs, one per side, into the Sun Rack II cabinet. You can install these PDUs anywhere between the rear RETMA rail and the rack’s rear frame. Provide adequate space to route the power input lead cords and any equipment data cables.
Using a T-30 Torx wrench key, secure the top and bottom PDU mounting brackets to the top rack frame using two M6 screws per bracket (see Installing a PDU Into a Sun Rack II Cabinet, numbers 1 and 2).
Each mounting bracket contains two additional screw holes used to secure a PDU to the bracket when a PDU ships in a rack from the factory (see Removing Shipping Screws From PDU for more information). Ignore these shipping screw holes when installing the PDU into the rack.

Figure 2-1 Installing a PDU Into a Sun Rack II Cabinet
Lift up the PDU, and ensuring that the circuit breakers are facing the rear of the rack, carefully set the PDU’s standoff bolts into the top and bottom bracket’s keyhole slots (see Installing a PDU Into a Sun Rack II Cabinet, numbers 3 and 4).

Caution - You need two people to lift and secure the PDU to the rack.

The PDU is held in the rack by gravity, with the standoff bolts resting in the mounting brackets’ keyhole slots.

Note - The circuit breakers must face the rear of the rack so that you can reset a breaker if one trips.
(Optional) Use a T-25 Torx wrench and four M5 shipping screws and washers to secure the PDU to the mounting brackets (see Securing the PDU Using the Shipping Screws).
For extra durability, secure the PDU to the mounting brackets using the shipping screws and washers (two screws and washers per bracket). If you plan to ship the rack to another location, you must secure the PDU using these shipping screws.

Figure 2-2 Securing the PDU Using the Shipping Screws
Attach an antistatic strap to your wrist and to a 10 mm ESD grounding snap on the rack (see Attaching an Antistatic Wrist Strap).
Figure 2-3 Attaching an Antistatic Wrist Strap
Attach a grounding strap from the rack to the top of the PDU (see Attaching the Grounding Strap to the PDU).
Figure 2-4 Attaching the Grounding Strap to the PDU
Route the power input lead cords between the rear RETMA rail and side panel.
A PDU has one to three power input lead cords, which you must route between the side panel and the rear RETMA rail.
Route the power input lead cords either down through the bottom of the rack (see Routing Power Input Lead Cords Down Through the Bottom of the Rack), or up through the top of the rack (see Routing the Power Input Lead Cords Through the Top Cable Window), depending on where you plan to connect them to the main power source.
If you are routing the cables through the bottom of the rack, refer to the Sun Rack II User’s Guide for the dimensions of the floor cutout.

Caution - Never twist, kink, or tightly bend a power input lead.

Figure 2-5 Routing Power Input Lead Cords Down Through the Bottom of the Rack

Figure 2-6 Routing the Power Input Lead Cords Through the Top Cable Window

Caution - If you route power input lead cords through the top cable window, do not rest the cables on the plastic sliding doors.
After installing the PDUs, use a T-30 Torx wrench to secure cable routing brackets to the rack frame using two M6 screws per bracket.
Install these brackets near where the power input leads exit the rack (see Routing Power Input Lead Cords Down Through the Bottom of the Rack and Routing the Power Input Lead Cords Through the Top Cable Window).
Using tie-wraps, secure the PDU input lead cables to the cable routing brackets.
If you are installing a second PDU into the rack, follow Step 2 through Step 10 to install the second PDU.

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	Sun Rack II Power Distribution Units User’s Guide