PoweredUSB
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cash register PoweredUSB, also known as Retail USB, USB PlusPower, USB +Power, and USB Power Plus, is an addition to the Universal Serial Bus standard that allows for higher-power devices to obtain power through their USB host instead of requiring an independent power supply or external AC adapter. It is mostly used in point-of-sale equipment, such as receipt printers, touch screens and barcode readers.
cash register]] PoweredUSB, also known as Retail USB, USB PlusPower, USB +Power, and USB Power Plus, is an addition to the Universal Serial Bus standard that allows for higher-power devices to obtain power through their USB host instead of requiring an independent power supply or external AC adapter. It is mostly used in point-of-sale equipment, such as receipt printers, touch screens and barcode readers. ==History== PoweredUSB, as a proprietary variant of USB, was developed and proposed by IBM, Berg Electronics (now a subsidiary of Amphenol), NCR Corporation, and Microsoft between 1998 and 1999, with the last revision (0.8g) issued in 2004. The specification is not endorsed by the USB Implementers Forum (USB-IF). IBM, who owns patents to PoweredUSB, charges a licensing fee to manufacturers for its use. PoweredUSB was licensed by Hewlett-Packard, Toshiba, Epson, Fujitsu, Wincor-Nixdorf, Siemens, among others. ==Future== In 2012, the USB-IF released the USB Power Delivery Specification (USB PD) as an optional part of the USB 2.0 and 3.x specifications. It defines features similar to those addressed by PoweredUSB, but without requiring the use of proprietary connectors. Instead, the connectors defined in the USB 2.0 and 3.0 standards are continued to be used; higher currents require PD-aware USB-cables, though. USB hosts compliant with this USB specification can be requested by USB devices to provide alternative voltages (9, 15 and 20 V) and higher currents up to 3 A at 5 V (for a power consumption of up to 15 W) and optionally up to 5 A at either 12 V (60 W) or 20 V (100 W). ==See also== IBM Retail Store Solutions, the business unit for POS software and hardware within IBM ==References== ==External links== PoweredUSB Electro-Mechanical Specification Version 0.8g
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