Installation Instructions

T ask 4: R ack Mounting the Optional PSM Shelf Chapter 2: UBS Macro B T S Installation Procedure

Task 4: Rack Mounting the Optional PSM Shelf

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Objective

The objective of this procedure is to perform task 4:

• F or -48 V DC or 220 V AC UBS only .

Install the PSM shelf to the bottom of the rack. The site conﬁguration/characteristics will

determine if a PSM shelf is to be installed.

• Install the appropriate, -48 V DC or 220 V AC , PSMs into PSM shelf slots 1 and 2. Either up

to two -48 V DC or up to two 220 V AC PSMs can be installed in the shelf . One PSM is

required for the low capacity conﬁguration and the second PSM is for redundancy .

Required items

The following items are required:

• Either a -48 V DC or 220 V AC PSM shelf (whichever is applicable)

• Either up two -48 V DC or 220 V AC PSMs (whichever is applicable)

• Eight (8) M5 x 12 mm screws for mounting the PSM shelf - these screws are included in

the STGN4034 Installation Kit that is packaged with the UBS Macro carrier strip assembly

• T ape measure with millimeter scale, capable measuring up to 1200 mm or with inch scale,

capable measuring up to 48 inches; for measuring screw location heights on rack

• TORX T25 bit and driver

• T orque driver

Procedure

Procedure 2 -3 gives the procedure for performing T ask 4.

Procedure 2 -3 Procedure for T ask 4

Locate the bottom RU that is to be used for the installation of the PSM shelf .

Using a tape measure, measure mounting screw location heights on each

side of the rack. Measure from the bottom of the RU determined in step 1

(Refer to Figure 2-13 ). Mark the following screw locations:

Continued

2 -32 68P09283A62 -2

PRELIMINARY A UG 2007