Cisco 5509 Installation Guide - Page 20

Unpacking and Installing the Controller Grounding the Chassis Note If you mid-mounted the chassis in a 2-post rack (see Figure 15), you cannot use the chassis grounding pad or the provided grounding lug. You will need to ground the chassis in a different location on the chassis (such as the rear bracket mount holes using an M3 screw) using your own grounding lug. A grounding pad with two threaded M4 holes is provided on each side of the chassis for attaching a grounding lug. Note To maintain the chassis height of one rack unit (RU), install the grounding lug on the right side of the chassis in the wire-up position, or on the left side of the chassis in the wire-down position. Figure 17 shows the system ground location on the right side of the controller. Figure 17 Location of Chassis Ground on the Controller (Right Side) 251241 RP SP USB0 USB1 CONSOLE EN EN Cisco 5500 Series Wireless Controller 12 34 56 78 Model 5508 PS1 PS2 SYS ACT Warning When installing or replacing the unit, the ground connection must always be made first and disconnected last. Statement 1046 Caution We recommend grounding the chassis, even if the rack is already grounded. Caution All power supplies must be grounded. The receptacles of the AC power cables used to provide power to the chassis must be the grounding type, and the grounding conductors should connect to protective earth ground at the service equipment. Cisco 5500 Series Wireless Controller Installation Guide 20 78-18998-01