Cisco IPS-4255-K9 Installation Guide - Page 108

Installing the Rail System Kit Chapter 4 Installing the IPS 4270-20 No tools are required for the round- and square-hole racks. You may need screws that fit the threaded-hole rack and a driver for those screws.You need a standard screwdriver to remove the roundand square-hole studs from the slide assemblies when you install the security appliance in a threaded-whole rack. This rail system supports a minimum rack depth of 24 in. (60.96 cm) and a maximum rack depth of 36.5 in. (92.71 cm). Rail System Kit Contents The rail system kit contains the following items: • Two slide assemblies • Two chassis rails • Four Velcro straps • Six zip ties • One cable management arm • A package of miscellaneous parts (screws, and so forth) • One cable management arm stop bracket Space and Airflow Requirements To allow for servicing and adequate airflow, follow these space and airflow requirements when choosing where to place a rack: • Leave a minimum clearance of 25 in. (63.5 cm) in front of the rack. • Leave a minimum clearance of 30 in. (76.2 cm) behind the rack. • Leave a minimum clearance of 48 in. (121.9 cm) from the back of the rack to the back of another rack or row of racks. The IPS 4270-20 draws in cool air through the front and expels warm air through the back. The front and back rack doors must be adequately ventilated to allow ambient room air to enter the chassis and the back must be adequately ventilated to allow warm air to escape from the chassis. 4-16 Cisco Intrusion Prevention System Appliance and Module Installation Guide for IPS 7.0 OL-18504-01