In fact, the serial barcode scanner and keyboard barcode scanner, its advantages and disadvantages who is a: external power supply. Why use a serial barcode scanner? External power supply in appearance a bit ugly, but must Cadogan a power connector, but precisely because of this, it does not use the computer's power supply voltage is guaranteed. Some bar code scanner for voltage requirements are relatively high, keyboard port connected barcode scanner after this load, the voltage on the low down, is not working. And serial port can take a variety of host devices: PC, cash registers, terminals, barcode scanner keyboard port in the application scope is not as good as it. Let's make a comparison, in fact, scanner, keyboard port or serial port should choose according to their own needs. Compare the contents of the serial keyboard port USB port power supply external, such as organic within the power supply can also be converted Guangzhou wholesale scanner, such as PC, POS machines are also available from the PS / 2 fetch electricity (expert level in order to do so) from the keyboard without external power USB port, no external RS232 standard length by 200 feet (60 meters), the actual also longer 1.5 to 5 m USB specification 1.5 to 3 meters Applications PC, POS, industrial machines, terminals, data terminals PC, part of the POS machines, part of the terminal PC, Mac driver Scanpard, WinCom2key, com2key need to be supported by Windows, Windows built-speed input speed is not tested with the other two over the data acquisition is a combination of barcode scanner and handheld computers, along with a barcode scanner and PDA functionality. Is a kind of on-site real-time data acquisition, processing automation equipment. You can collect data in real time, automatic storage, real-time display, real-time feedback, automatic processing and automatic transmission. For authenticity, validity, timeliness and availability of field data to provide a guarantee. Data collection is a programmable device, generally have Flash program memory, SRAM data memory and program memory is used to store user programs and fonts pt850 scanner Guangzhou, the data memory is used to store user data. Data acquisition of the operating system, there are two categories, one is based on WIN CE system, such a system is easy to program development, and powerful barcode scanner price, but slightly higher equipment prices, and the other is to use a dedicated operating system, the general program development using C word. Data acquisition and PC communications in general using serial, USB or infrared mode, data exchange methods commonly used files. Divided by batch and wireless transmission way: batch mode data acquisition after acquisition is a good bar, after connecting the bar code information collected is transmitted to a computer via serial port, USB or infrared manner by way of computer files; Wireless way data acquisition and real-time data exchange with 802.11b wireless GPRS, etc. and the PC. (Recommended) Guangzhou State Association scanner, scanner wholesale Guangzhou, Guangzhou association scanner provided by the state. Looking for "cash register, scanner, bar code machines, management software, small ticket machines, cash registers, shredders" fly suppliers, network operators choose to have a full alliance Certified: Guangzhou Contracting State Information Technology Co., Ltd. ( www.gzdb899.com), trustworthiness and reliability, now click on the "Business Alliance customer service" on page live chat with us now!