User manual

Wide Bank 28 DS3 - Release 2.4 July 2004 4-9

Physical Installation

Mounting the Wide Bank 28 DS3

Rack Mounting - FFO-Equipped Units

 Fan Faceplate Option ... 4-9

 Rack Mounting (High-Density) ... 4-10

High-density mounting of the Wide Bank requires additional cooling

capability provided by the Fan Faceplate Option (FFO). Any Wide Banks

mounted with less than one rack unit of space between them must have

the FFO option installed.

With FFO the Wide Bank meets NEBS thermal performance criteria for

installation of up to 40 units per rack with no space between units (see

Figure 4-5 and Figure 4-7).

Fan Faceplate Option

The Fan Faceplate Option provides additional cooling capacity to

allow the Wide Banks to be mounted with no space between them.

When fan faceplates are installed, the fan power connectors on the

faceplates mate with power connectors on the Controller cards (see

Figure 4-6). When installing a faceplate, use care to ensure correct

alignment of the power connectors before tightening the fastening

screws at each end of the faceplate. Also, the fastening screws must

be tightened with an adequate tool for compliance with UL 1950. Do

not overtighten.

The fans start operating 30 seconds after the FFO is installed.

Figure 4-5 Standard Rack Fully Loaded with FFO-Equipped Units

NOTE: Pre-FFO Wide Banks can be converted to FFO units. The conversion requires

new Controller cards that can accommodate a Fan Faceplate and loaded with software

release 2.0 or higher.

FUSE PANEL