Cisco Systems MDS 9200 Series Requirements Specific to Perforated Cabinets, Rittal Corporation

Appendix A Cabinet and Rack Installation

Cabinet and Rack Requirements

Se n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a ck - d o c @ c i s c o . c o m

The cabinet or rack must also meet the following requirements:

•The minimum vertical rack space per chassis must be three RU (rack units), equal to 5.25 in. (13.3 cm).

•The width between the rack-mounting rails must be at least 17.75 in. (45.1 cm) if the rear of the switch is not attached to the rack. For four-post EIA racks, this is the distance between the two front rails.

•For four-post EIA cabinets (perforated or solid-walled):

–The minimum spacing for the bend radius for fiber-optic cables should have the front mounting rails of the cabinet offset from the front door by a minimum of 3 in. (7.6 cm), and a minimum of 5 in. (12.7 cm) if cable management brackets are installed on the front of the chassis.

–The distance between the outside face of the front mounting rail and the outside face of the back mounting rail should be 23.5 to 34.0 in. (59.7 to 86.4 cm) to allow for rear bracket installation.

–A minimum of 2.5 in. (6.4 cm) of clear space should exist between the side edge of the chassis and the side wall of the cabinet. No sizeable flow obstructions should be immediately in the way of chassis air intake or exhaust vents.

Note Optional jumper power cords are available for use in a cabinet. See the “Jumper Power Cord” section on page C-11.

Requirements Specific to Perforated Cabinets

A perforated cabinet is defined here as a cabinet with perforated front and rear doors and solid side walls. In addition to the requirements listed in the “General Requirements for Cabinets and Racks” section on page A-1, perforated cabinets must meet the following requirements:

•The front and rear doors must have at least a 60% open area perforation pattern, with at least 15 square inches of open area per rack unit of door height.

•Cisco recommends that the roof be perforated with at least a 20 percent open area.

•Cisco recommends an open or perforated cabinet floor to enhance cooling.

A perforated cabinet that conforms to these requirements is available from Rittal Corporation:

Rittal Corporation

One Rittal Place

Springfield, OH 45504

Contact: (800) 477–4220

Cabinet P/N: Rittal 9969427

Cabinet description: PS-DK/OEM Cabinet Assembly, (78.7 in.) 1998 mm X 23.6 in. (600 mm) X 39.4 in. (1000 mm) (H x W x D) (42 RU)

Cisco MDS 9200 Series Hardware Installation Guide

A-2 OL-17468-02