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Rabu, 29 Februari 2012

How the UPS Work


UPS

A UPS (Uninterruptible Power Supply), also known by its acronym in English UPS (Uninterruptible Power Supply 'uninterruptible power supply') and incorrectly generalized and not break, is a device through its battery can provide power after an outage to all attached devices. Another function of UPS is to improve the quality of the electricity that comes to equipment, filtering up and down and eliminating harmonic voltage network in the case of using AC. UPS provide electric power to equipment called critical loads, such as medical devices, industrial computer which, as stated earlier, have always required and that it be food quality because of the need to be operational at all times and without failure (spikes or brownouts).

Power

The power unit to set up a UPS is the voltiamperio (VA) or watts, apparent power which is also called effective or effective power consumed by the system. To calculate how much energy it takes your computer, search for consumption in the rear of the unit or the manual. If actual or effective power, in watts, multiply the number of watts by 1.4 to account for the maximum peak power that can reach your computer, for example: 200 watts x 1.4 = 280 VA. If you found is the nominal voltage and current to calculate the apparent power (VA) multiply the current (amps) by the voltage (volts), for example: 3 amps. x 220 Volts = 660 VA.

Type

DC UPS

Loads connected to the UPS require a DC power supply, therefore they will transform the alternating current to direct current commercial network and used to feed the load and store in their batteries. Therefore do not require converters between the batteries and loads.

AC UPS

These UPS obtained at its output an AC signal, so you need an inverter to convert the continuous signal coming from the batteries into an alternating signal.

2 - USB:

The Universal Serial Bus (Universal Serial Bus) or Universal Serial Driver (CUS), commonly abbreviated USB port is used to connect peripherals to a computer. It was created in 1996 by seven companies (which now form the board): IBM, Intel, Northern Telecom, Compaq, Microsoft, Digital Equipment Corporation and NEC. [1]

The design of USB had in mind to eliminate the need to purchase separate cards to put in the ISA or PCI bus ports, and improve plug-and-play allowing these devices to be connected or disconnected to the system without rebooting. However, in applications that require large bandwidth for data transfers, or if you need low latency PCI or PCIe buses wins. The same is true if the application requires industrial strength. In favor of the USB bus, note that when connecting a new device, the server lists and adds the necessary software for it to work (depending of course on the OS you're using the computer).


3-VESA:

VESA, Video Electronics Standards Association (Electronics Standards Association video) is an international association of electronics manufacturers. NEC was founded in the 80 twentieth century, with the initial goal of developing video screens with a joint resolution of 800x600 pixels. Since then VESA has other standards related to video capabilities of the IBM PC peripherals and compatible connectors, BIOS or frequency characteristics, transmission and synchronization of the image.

Main VESA standards:

* VESA Bus (VLB), previously used as a high-speed port for video (before the onset of the CPA)
* VESA BIOS Extensions (VBE), used to create a standard that soportase advanced video modes (high resolution and billions of colors).
* VESA Display Data Channel (DDC), which allows the monitors to identify themselves to graphics cards that are connected. However, the current form of identification is called EDID (Extended Display Identification Data).
* VESA Display Power Management Signaling, which allows the monitors to report that kind of power saving modes have.
* Digital Packet Video Link
* A series of patents for flat panel displays, video connectors and synchronization of digital video.

4-VGA:

The term Video Graphics Array (VGA) refers both to a standard analog computer display (VGA connector 15-pin D subminiature which was first marketed in 1988 by IBM), as resolution 640 × 480.While this resolution has been replaced in the computer market, is becoming popular again by mobile devices. VGA was the last graphical standard introduced by IBM that the majority of PC clone manufacturers conformed, so today (from 2007) the minimum that all graphics hardware supports before loading a specific device.For example, Microsoft Windows screen appears while the machine is still operating in VGA mode, why is always displayed with reduced resolution and color depth. VGA was officially superseded by IBM's XGA standard, but in reality has been superseded by numerous slightly different extensions to VGA clone made by manufacturers that became known collectively as "Super VGA".

VGA called "matrix" (array) instead of "adapter" (adapter), as was implemented from the start as a single chip, replacing the Motorola 6845 and dozens of discrete logic chips covering a full length ISA card that MDA, CGA and EGA used. This also allows to be placed directly on the motherboard of the PC with a minimum of difficulty (only required video memory and an external RAMDAC). The first models IBM PS / 2 were equipped with VGA on the motherboard.VGA specifications are as follows:

* 256 MB Video RAM Modes: 16-color and 256-color
* 262144 values ​​of the color palette (6 bits for red, green and blue)
* Master Clock of 25.2 MHz selectable or 28.3
* Maximum of 720 horizontal pixels
* Maximum of 480 lines
* Refresh rate up to 70 Hz
* Vertical Interrupt empty (Not all cards support it)
* Flat mode: up to 16 colors
Packed pixel mode *: 256 color mode (Mode 13h)
* Support for scrolling
* Some operations for bitmaps
* Barrel shifter
* Support from the screen
* 0.7 V peak to peak
* 75 ohm impedance (9.3mA - 6.5mW)

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