NEC Express 5800 User Manual

Contents

NEC Express 5800 User Manual Manual pdf 34 page image

3-6 Planning Your System Rack ConfigurationConfiguration GuidelinesWhen you configure a system, you should check your configuration to ensurecompliance with the following guidelines:1. To improve rack stability when servicing system components, mount heavieritems such as servers in the bottom of the rack. If your rack is a stand-aloneunit and the rack is more than 75% filled with components, considerinstalling the optional side stabilizer kit.2. Each Model 42U Rack can contain up to 42U of components (1U is equal to1.75 inches). Models 36U and 27U contain up to 36U and 27U ofcomponents, respectively.3. The maximum Volt/Amps available from a single UPS is 3000VA (2250W).4. The maximum Volt/Amps available from a single PDU is 2880VA.5. The UPS should always be installed in the bottom of the rack.6. The UPS and its associated PowerChute® plus software can only supportthree servers per UPS, without purchasing an additional interface expandermodule and additional cables.7. If power distribution is provided by a PDU, the PDU is normally installed inthe bottom of the rack. However, when rack space is at a premium, you caninstall the PDU directly behind the keyboard tray or the monitor tray.8. The keyboard can be no more than 5U from the BSU unless a concentratoror extension cables are purchased.9. If you are configuring the keyboard for use in a standing position, therecommended height is 18 to 20 U.The System Rack Configuration Worksheet, Table 3-3, may be used to calculatethe space requirements for components you plan on installing into the rack.