Is the transmission speed of the barcode printer related to the interface? Yes, the bar code printer is divided into 5 kinds of interfaces: serial port (also called RS-232 interface), parallel port, USB interface, network port and PS/2 (mouse keyboard port), wherein the USB interface output speed is the fastest, support Hot swapping, quickly emerging in the zebra barcode printer interface type.
The speed of the printout is different depending on the interface selection.
The PC usually has two serial ports COM 1 and COM 2 . The serial port differs from the parallel port in that its data and control information are transmitted one by one. The speed will slow, but the transmission interval will be longer than the parallel port, so the serial port should be used for longer interval communication. Usually COM 1 uses a 9-pin D-shaped connector, also known as the RS-232 interface, while COM 2 uses an old-fashioned DB25-pin connector, also known as the RS-422 interface. It has been rarely used.
2. Parallel interface
The parallel interface is an enhanced two-way parallel transmission interface. The advantage is that there is no need to use other cards in the PC, the number of connections is not limited (as long as you have enough ports), the device is easy to install and use, and the maximum transmission speed is 1.5Mbps. At present, the parallel interface in the computer is mainly used as a bar code printer port, and the interface is no longer a 36-pin connector but a 25-pin D-shaped connector. The so-called "parallel" means that 8-bit data is transmitted simultaneously through parallel lines, so that the data transfer speed is greatly improved, but the length of the line for parallel transmission is limited, and the interference is increased due to the increase in length, which is prone to error.
The full name of USB is Universal Serial Bus. USB supports hot plugging and plug and play. Therefore, USB interface has become the most important interface mode for electronic products such as MP3 and digital cameras. The change brought about by the use of USB for barcode printer applications is a significant increase in speed. The USB interface provides a connection speed of 12 Mbps, which is more than 10 times faster than the parallel port speed. At this speed, the file transfer time is greatly reduced. The USB 2.0 standard further advances the interface speed to 480 Mbps, which is 20 times faster than the normal USB speed, which greatly reduces the transmission time of print files.
Of course, the USB interface is also divided into A and B types. For example, HONEYWELL intermec PD43 supports USB A and B types respectively. As for the difference between them? To put it simply, the Type-A interface is the most common standard USB interface we usually use, and other shapes of interfaces are its derivatives.
4. Network port
The network port is the RJ45 network port. The printer supports network printing, that is, just connect to the LAN, set its IP, share, network protocol, etc., and then set up the computer that needs to be connected to print under the same network (the specific steps are not expanded here) , you can directly print out the data transmitted by the computer through the network transmission. The biggest advantage of network port printing is that it supports multiple computers sharing the same printer. The printing speed is fast, especially when printing some documents with large amount of data and complicated and high-precision pictures. Models like TOSHIBA B_462TS\Intermec PD42 have a network port interface.
PS/2 is one of the most common interfaces on older computers for devices such as mice and keyboards. The connector is smaller in package and still uses a bidirectional serial communication protocol and provides a selectable third set of keyboard scans. The code set supports 17 host-to-keyboard commands at the same time. Now, the keyboards on the market are compatible with PS/2 and USB keyboards, but with different functions. The advantage of PS/2 is that it does not occupy system resources. The disadvantage is that its interface device does not support hot swapping. Forced hot swapping may burn the motherboard.
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