Dell PowerConnect 3248 System User's Manual

Also see for PowerConnect 3248: Manual Features list Specification

Systems are considered to be components in a rack. Thus, "component" refers to any system as well as to various peripherals or supporting hardware.CAUTION: Installing systems in a rack without the front and side stabilizers installed could cause the rack to tip over, potentially resulting inbodily injury under certain circumstances. Therefore, always install the stabilizers before installing components in the rack.After installing system/components in a rack, never pull more than one component out of the rack on its slide assemblies at one time. Theweight of more than one extended component could cause the rack to tip over and may result in serious injury.NOTE: Your system is safety-certified as a free-standing unit and as a component for use in a Dell rack cabinet using the customer rack kit. The installation ofyour system and rack kit in any other rack cabinet has not been approved by any safety agencies. It is your responsibility to have the final combination ofsystem and rack kit in a rack cabinet evaluated for suitability by a certified safety agency. Dell disclaims all liability and warranties in connection with suchcombinations.l System rack kits are intended to be installed in a rack by trained service technicians. If you install the kit in any other rack, be sure that the rack meetsthe specifications of a Dell rack.CAUTION: Do not move racks by yourself. Due to the height and weight of the rack, a minimum of two people should accomplish this task.l Before working on the rack, make sure that the stabilizers are secured to the rack, extended to the floor, and that the full weight of the rack rests onthe floor. Install front and side stabilizers on a single rack or front stabilizers for joined multiple racks before working on the rack.l Always load the rack from the bottom up, and load the heaviest item in the rack first.l Make sure that the rack is level and stable before extending a component from the rack.l Use caution when pressing the component rail release latches and sliding a component into or out of a rack; the slide rails can pinch your fingers.l After a component is inserted into the rack, carefully extend the rail into a locking position, and then slide the component into the rack.l Do not overload the AC supply branch circuit that provides power to the rack. The total rack load should not exceed 80 percent of the branch circuitrating.l Ensure that proper airflow is provided to components in the rack.l Do not step on or stand on any component when servicing other components in a rack.CAUTION: A qualified electrician must perform all connections to DC power and to safety grounds. All electrical wiring must comply withapplicable local or national codes and practices.CAUTION: Never defeat the ground conductor or operate the equipment in the absence of a suitably installed ground conductor. Contact theappropriate electrical inspection authority or an electrician if you are uncertain that suitable grounding is available.CAUTION: The system chassis must be positively grounded to the rack cabinet frame. Do not attempt to connect power to the system untilgrounding cables are connected. Completed power and safety ground wiring must be inspected by a qualified electrical inspector. An energyhazard will exist if the safety ground cable is omitted or disconnected.Modems, Telecommunications, or Local Area Network Optionsl Do not connect or use a modem during a lightning storm. There may be a risk of electrical shock from lightning.l Never connect or use a modem in a wet environment.l Do not plug a modem or telephone cable into the network interface controller (NIC) receptacle.l Disconnect the modem cable before opening a product enclosure, touching or installing internal components, or touching an uninsulated modem cableor jack.When Working Inside Your SystemProtecting Against Electrostatic DischargeStatic electricity can harm delicate components inside your system. To prevent static damage, discharge static electricity from your body before you touch anyof the electronic components, such as the microprocessor. You can do so by periodically touching an unpainted metal surface on the chassis.You can also take the following steps to prevent damage from electrostatic discharge (ESD):l When unpacking a static-sensitive component from its shipping carton, do not remove the component from the antistatic packing material until you areready to install the component in your system. Just before unwrapping the antistatic packaging, be sure to discharge static electricity from your body.l When transporting a sensitive component, first place it in an antistatic container or packaging.l Handle all sensitive components in a static-safe area. If possible, use antistatic floor pads and workbench pads and an antistatic grounding strap.NOTE: Your system may also include circuit cards or other components that contain batteries. These batteries must also be disposed of in a battery deposit

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