Rs232 Pinout And Specifications Guide 25 pin serial pinout: pin 1: gnd − shield ground. pin 2: txd → transmitted data. carries data from the data terminal to the data set. pin 3: rxd ← received data. carries data from the data set to the data terminal. pin 4: rts → request to send. data terminal signals the data set to prepare for data transmission. The interface is two types db9 and db25 pin connectors. the interface is mainly used for one to one serial communication for example computer to dial up modem connection. db25 and db9 connector pin diagram of rs232. figure 1 and 2 depicts rs 232 pin diagrams for db9 and db25 connectors. as shown in the figure, it carries both data and control.
Rs232 Pinouts And Connections Rs232 Pinout Data Lines Explained In Detail Pinout of rs 232 (eia 232) serial interface and layout of 25 pin d sub male connector and 25 pin d sub female connectorrs 232 is the standard serial communications interface found on many types of equipment such as computers, modems, printers, microcontrollers, eprom programmers, and a host of other devices. A serial pinout diagram is presented below. the rs232 protocol uses a 9 pin serial port that can have either male or female connectors. the most recent version of the protocol is known as rs232c. rs232c retains the features of rs232 but uses 25 pins rather than a 9 pin serial pinout. whether a db9 serial pinout or a 25 pin connection is used. The need for rs232 came from limitations raised by parallel data exchange. rs232 uses serial communication protocol where data exchange is done bit by bit. although rs232 is later replaced by faster usb (universal serial bus); it is still popular in some areas. rs232 used to have 25 pin, now it is shrunk to just 9 pin. rs232 pin configuration. Rs 232 specifications. rs 232 is a complete standard. this means that the standard sets out to ensure compatibility between the host and peripheral systems by specifying: common voltage and signal levels. common pin wiring configurations. a minimal amount of control information between the host and peripheral systems.
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