Installing the Switch | 19• Ensure that your tabletop is stable and can handle the weight of the switch or a stack of switches, if thatis the case, along with any added backup power supplies.• Position the table for proper ventilation and easy access to separate power outlets for each device.Installing the System in a Rack or CabinetThe system provides three rack-mounting methods:• Two-Post Rack Mounting• Four-Post Rack-mounting with Threaded Rails• Four-Post Rack-mounting with Cage NutsTwo-Post Rack MountingThe switch is shipped with the universal front-mounting brackets (rack ears) attached. Ensure that there isadequate clearance surrounding the rack to permit access and airflow. If you are installing two switchesside-by-side, position the two chassis at least 5 inches (12.7 cm) apart to permit proper airflow.Position the chassis in the rack. Secure the chassis with two of the supplied screws through each bracketand onto the rack post.Figure 4-1. Two-post (Front-mounted) Rack-mountingFour-Post Rack-mounting with Threaded RailsEnsure that there is adequate clearance surrounding the cabinet or rack to permit access and airflow. Ifyou are installing two S-Series side-by-side, position the two units at least 5 inches (12.7 cm) apart topermit proper airflow. Follow the steps below to install a unit into a 4-post 19-inch equipment rack, usingthe attached front mounting brackets and the optional adjustable rear-mounting brackets.fn00147as50V