Superdome Servers - I/O Expansion Cabinet Guide, Fifth Edition

Chapter 1

Introduction

Cabinet Description

The IOX cabinet is a welded steel frame with removable top, rear doors, casters, leveling feet, and an anti-tip

mechanism as shown in Figure 1-18. The top piece is 16-gauge, cold-rolled steel. The base piece is 11-gauge,

hot-rolled steel. Threaded grounding studs are provided near the base of every column, and at the top rear.

The cabinet itself is not grounded.

Cabinet heights are measured in meters, inches, EIA units, and “U.” One EIA unit equals 1 U, which equals

44.45 mm (1.75 in). Internal equipment rails lock into slots in the vertical mounting columns and are fastened

to the columns with screws. Columns are numbered for easy placement. Tie-together kits allow easy, secure

mating of cabinets. The cabinet top and rear door are perforated for maximized cooling. The basic IOX cabinet

is shown in Figure 1-17.

Figure 1-17 IOX Cabinet (Rear View)

The top cap is 16-gauge, cold-rolled steel (CRS). The top cap and forehead are attached at the factory. The top

of the cabinet incorporates a ventilation path through the roof of the cabinet and a convection current heat

exit for the heat generated by the installed equipment.