Rugged Monitors, LCD’s and KVM Drawers
|Date Added: May 21, 2012 11:39:19 AM|
|Category: Computers: Hardware|
|A rugged monitor is a computer specifically designed to reliably operate in harsh usage environments and conditions, such as strong vibrations, extreme temperatures and wet or dusty conditions.They are designed from inception for the type of rough use typified by these conditions, not just in the external housing but in the internal components as well.In general, ruggedized and hardened computers share the same design robustness and frequently these terms are interchangeable. Typical end-user environment forrugged lcd, tablet PCs and PDAs are public safety, field sales, field service, manufacturing,retail, healthcare, transportation/distributionand the military.They are used in the agricultural industries and by individuals for recreational activities, as well, such as hunting or geocaching. Virtually all rugged monitors share an underlying design philosophy of providing a controlled environment for the installed electronics. The electronic components themselves may be selected for their ability to withstand higher and lower operating temperatures than typical commercial components. They incorporate features such as fully sealed keyboards to protect against intrusion by dust or liquids, and scratch-resistant screens that are readable in direct sunlight. Rugged units are more expensive in terms of annualized hardware costs. However, one research study found that in environments where rugged computers are commonly used, total cost of ownership was 36 percent lower for rugged notebooks and 33 percent less for handhelds and PDAs, compared to conventional non-rugged versions. The lower overall cost is due to lower failure rates, the related impact on productivity, and other factors. Wireless capability is a key requirement for most enterprise mobility applications, and it has been reported that wireless-transmission failure rates are three times higher for non-rugged monitors compared to rugged units. This difference is attributed to the greater experience of rugged-notebook vendors at integrating multiple radios into their products. Each transmission failure leads to five to ten minutes in lost productivity as the user has to re-login to the network through a VPN. Since enterprises are turning to cellular networks to enable full-time connectivity for their users, major vendors of ruggedlcd’s offer both built-in wireless LAN and wireless WAN capabilities, and partner with cellular carriers as part of their offerings. During the handoff between the various wireless LAN and wireless WAN connections, a mobile VPN allows the connection to persists, creating an always-connected infrastructure that is simpler for the user and eliminates application crashes and data loss. KVM drawers are designed to fit into standard server racks and come in a huge number of varieties to match whatever use case an organization may have. The KVM features of rackmount KVM drawers are particularly useful in the dense confines of a datacenter, where hundreds of servers may be densely packed. Accessing those computers with a local console is particularly challenging. Overview Rackmount KVM drawers are a highly efficient and low-cost method of providing local access to computers in a rack. KVM drawers typically come in 1U or 2U sizes, and provide standard KVM features. Strictly speaking, a KVM drawer includes a keyboard and pointing device (mouse, touchbad, or trackball) and an LCD monitor in a form factor that can open and close in the space of a rack drawer. However, some products include more or less features to match a particular use case. KVM Control Interface • PS/2: A PS/2 KVM drawer connects the keyboard and mouse through a pair of standard keyboard and mouse PS/2 connectors • USB: A USB KVM drawer connects the keyboard and mouse through a single, standard USB connector. This option is convenient for modern systems that have USB-enabled operating systems Display Interface • VGA: VGA is the most common type of display interface for KVM drawers. • DVI: With the rising popularity of DVI-capable displays, DVI KVM drawers have also become available. • Composite: Some unique commercial and industrial applications require BNC, RCA, or S-video capabilities. Composite KVM drawers provide the necessary interface connectors for these needs. • Sun (VGA): Legacy Sun/Solaris servers have a proprietary resolution that is not compatible with many standard LCD displays. Sun KVM drawers provide compatible LCD displays and also support proprietary Sun keyboard keys. Display Size • The display size of KVM drawers is limited by the width of standard 19-inch-wide server racks. As a result, KVM drawers are only available with 15-inch to 20-inch (diagonal) LCD displays. Keep in mind, however, that panel-mount LCD displays, which are mounted directly to the front of the rack, are available in larger sizes. IP KVM Switch IP-based remote access is a powerful feature that provides access at an additional remote location in addition to the local terminal. The KVM switch is connected to the network, making it accessible from a web browser on any computer on the network. A user connected from a remote computer can then remotely access any of the computers connected to the switch. This feature is hugely convenient for large datacenters. Input devices • Keyboard/mouse-only: For setups where a panel-mounted LCD is used, a keyboard- and mouse-only KVM drawer provides only a keyboardand either trackball or touchpad • Trackball or Touchpad: Most KVM drawers provide the option of either a keyboard-integrated trackball or touchpad. This is purely a user preference. • Touchscreen: For an added cost, rackmount LCD drawers can include resistive, capacitive, or infrared touchscreens. Slide types • Dual Slide: Dual-slide KVM drawers have two sliding drawers that slide independently of each other. One drawer houses the LCD display, and the other houses the keyboard/mouse. Depth • Short-depth: Short-depth KVM drawers are shorter to accomodate short racks (used in military and portable rack applications). Standard short-depth drawers are 17.3" Display Brightness • Sunlight Readable: Sunlight-readable displays are high-brightness displays mounted in the KVM drawer to make them usable in an outdoor environment. These displays are rugged and suitable for military and commercial applications. http://www.rackmountsales.com/Industrial_LCD_Panels_s/175.htm|
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