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What are the three common interface types of bar code scanning guns?

Release Time:2013-06-12

Some of the barcode scanner interface methods are plug and play, but some need to choose different interfaces because of work needs, so what are the three common interface types of barcode scanner?

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(1)SCSI (Small Computer Standard Interface): The maximum number of connected devices for this interface is 8, and the maximum transmission speed is usually 40 M/S, which is faster and generally connects high-speed devices. The installation of SCSI equipment is more complex, in the PC machine to add SCSI card, easy to produce hardware conflict, but powerful.

(2)EPP (Enhanced Parallel Interface): An enhanced bidirectional parallel transmission interface with a maximum transmission speed of 1.5Mbps. The advantage is that there is no need to use other cards in the PC, there is no limit to the number of connections (as long as you have enough ports), and the installation and use of the device is easy. The disadvantage is that it is slower than SCSI. This interface because of the installation and use of simple and convenient and in the low-end performance requirements are not high occasions to replace the SCSI interface.

(3)USB (Universal Serial Bus Interface): Up to 127 peripherals can be connected. The current USB1.1 standard has a maximum transmission speed of 12Mbps, and there is an auxiliary channel for transmitting low-speed data. In the future, if there is a USB2.0 standard scanning gun speed may be extended to 480 M/s. With hot plug function, plug and play. The scanning gun of this interface is gradually popularized with the establishment and promotion of USB standard under the push of Intel.

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