HP 10636 Best practices for HP 10000 Series and HP 10000 G2 Series Racks - Page 46
Appendix a: glossary
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Appendix a: glossary Table 9 lists technical terms and associated description. Table 9. Definition of technical terms Term Ballast Chassis Dedicated circuit branch Dynamic loading capacity Electronic Industries Association (EIA) Electromagnetic interference (EM() Electrostatic discharge (ESD) EOL (End of Life) fixed stabilizer keyboard/video/mouse (KVM) switch PDU PNP (Plug-and-Play) static loading capacity U UPS (uninterruptible power supply) Definition A metal block that can be mounted in the sides of the rack to provide additional weight and protection against tipping. Rack-mountable configuration of a server or a storage component. A dedicated electrical circuit between a source and distribution point. A dynamic environment is one where the rack is shipped on a shock pallet with equipment installed or rolling racks with equipment installed to new locations within the data center. A term used for signifying discontinuation of products. An anti-tip stabilizer providing stability and support when equipment is installed, removed, or accessed within the rack. It is recommended that you use a stabilizer option kit with a stand-alone rack. A switch that allows a single keyboard, video display monitor, and mouse to be switched to any of a number of computers. Power Distribution Unit A standard that gives computer users the ability to plug a device into a computer and have the computer recognize that the device is connected. A static environment is one where the rack is positioned into placed and the leveling feet are extended prior to equipment being installed. A standard unit of measure for designating the height in computer enclosures and rack cabinets. One U equals 1.75 inches (44.5 mm). Measurements typically go from the bottom of the rack up. For example, a 4U chassis is 7 inches (177.8 mm) high. A 42U rack cabinet has 73.5 inches (1866.9 mm) of usable mounting space. A device that allows a computer to continue running for at least a short time after the primary power source is lost. 44