【 Absolute dry 】 Bar code printer 5 interface type _ printing equipment problems
bar code printer and computer is through the interface connection between, bar code printer is divided into five kinds of interface: a serial port ( Also has is called RS - 232 interface) , parallel, USB, front-end ports and PS / 2 ( Key mouse position) 。 The USB output speed is the fastest, supporting hot plug, rapid rise in the zebra barcode printer interface type. Under the specific analysis of the characteristics and differences between each interface.
1 serial port
a serial port is called a serial interface, the PC generally has two serial COM and COM 1 2. Serial port is different from the parallel port in its data and control information is a pick up a transmission. Speed will be slower, but more parallel port transfer interval longer, so if want to undertake a long interval of communication, serial port should be used. COM usually use 9-pin 1 D coupling, also called RS - 232 interface, and some use COM 2 is old-fashioned DB25 pin connector, also known as RS - 422 interface, this interface is now rarely used.
2 parallel interface ( Parallel port)
parallel interface and short name & quot; Parallel port & quot; , is a kind of enhanced two-way parallel transmission interface. The advantage is no need to use other card in PC, connect any number ( As long as you have enough port) , equipment installation and use easily, high transmission speed of 1. 5Mbps。 At present, the parallel interface of computer as a main bar code printer port, 36 needle joint interface is no longer used but the 25 needles D shape joint. The so-called & quot; Parallel & quot; Refers to the 8 bits of data transmitted through the parallel line, at the same time so that data transfer speed progress greatly, but parallel transmission line length is limited, the increased length, interference will increase, easy to get wrong. 3 USB interface
is the full name of USB Universal Serial Bus, USB support hot plug, plug and play of the advantages, so the USB interface has become MP3, digital cameras and other electronic products the main way of interface. For the bar code printer using USB application of change is significantly increase speed, USB interface provides 12 MBPS connection speed, parallel speed improvement, to achieve more than 10 times, under the speed printing file transfer time is greatly reduced. USB 2。 0 standard further advances the interface speed to 480 MBPS, is ordinary USB speed of 20 times, more drastically reduces the print file transfer time. , of course, the USB interface is divided into A, B, such as HonEYWELL intermec PD43 respectively support USB. A, B two types of interface. As for what's the difference between them? A simple way, the Type - A interface is we usually use most standard USB interface, and other interfaces are in the shape of its derivatives. 4 so
so the RJ45 port network, printer support network printing, namely as long as access network, set up its IP, sharing, network protocol, etc. , to set up under the same network needs to connect to print computer ( Specific steps here is not opened) , you can through the network transmission, print out the computer directly to the transmission of data. So print the biggest advantage is to support multiple computers to share the same printer, printing speed, especially in print some of the large amount of data and documents contain complex, high-precision photo, its advantage is especially obvious. Like TOSHIBA B_462TS Intermec PD42 these models with front-end ports interfaces.
5 PS / 2 interface
a PS / 2 is one of the common interface on the computer earlier, in which devices such as mouse, keyboard, the connector on the packaging is smaller, still with two-way serial communication protocol and provides the choice of the third set of keyboard scan code set, at the same time support 17 between a host and the keyboard commands. Now, the keyboard is available in the market and PS / 2 and USB keyboard compatible, just different functions. PS / 2 has the advantage that do not take up system resources, the disadvantage is that the interface device does not support hot plug, forcibly charged plug could be burned motherboard.