The serial port can be differentiated from the par allel port in that the 25pin parallel port lpt1. Iolan rj45 cable diagrams perle serial to ethernet. The cables provide a fast, simple way to connect devices with a rs232 level serial uart interface to usb. For direct connection to serial port of computer or automation system, plug male db9 connector of serial cable not supplied into the db9 connector of the rs232 converter and connect other end to serial port of computer. Modern hardware designs use innovative serial communication protocols like usb, ethernet, and wifi. Table 1 shows the signal names, and functions of the rs232 serial port pinout. According serial data cables for these systems require the additional lines to be incorporated into the serial data cables for them to operate correctly. Serial transmission involves the sending of data one. It is used in serial communication up to 50 feet with the rate of 1. As it obtains the voltage for the path used for the data exchange between the devices. For even and odd parity, the serial port sets the parity bit the last bit after the data bit to a value to ensure that the data packet has an even or odd number of logic. Rs232 datasheet, rs232 pdf, rs232 data sheet, rs232 manual, rs232 pdf, rs232, datenblatt, electronics rs232, alldatasheet, free, datasheet, datasheets, data sheet. The most common serial communication protocols are rs232, rs485, rs422, usb, and ethernet.
Panelview terminal panelview plus terminal versaview ce terminal industrial applications may require especially long run lengths, which. But because usb and ethernet require powerful interfaces with complex protocols, many efficient devices utilized rs232, rs485, and rs422 which is what this note is all about. Rs232 conveys data over a simple unterminated, multiconductor cable at. Protocol comparison chart rs232 rs422 rs485 cable single ended. Rs232 serial interface cables should be shielded, low capacitance cables, ideally designed specifically for serial data transmission. Rs232 is a standard protocol used for serial communication, it is used for connecting computer and its peripheral devices to allow serial data exchange between them. Rs232 serial data cable using minimum number of connections. The rs232 interface is the electronic industries association eia standard. The 25 pin serial conne ctor is a male on the pc and a female on the cable. The different connector types can cause problems in connecting devices. Some rs232 connections using handshaking lines between. Rs 232 is intended to be a standard but not all manufacturers abide by it. More comprehensive systems may utilise the additional lines provided by rs232. Selecting a cable the major consideration in choosing an rs232 cable is, what devices are to be connected.
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