Pc 9 Pin Rs232 Pinout

Db9 pinout and signals for the pc rs232 connector serial and rs232 ports db9 pin d sub male.

Pc 9 pin rs232 pinout. Rs 232 maximum cable length. Rs232 9pin connections functions and pin outs. Thus it is important to understand how the 9 pin rs232 cable pinout can affect the flow of serial data between devices. Rs232 serial port monitoring hardware stands out for a number of reasons including its 9 pin rs232 pinout.

The background of the 9 pin serial port. Pinout of pc serial port rs 232 de9 and layout of 9 pin d sub male connector and 10 pin idc male connectorthis rs232c de 9 usually miscalled db 9 port is available in some pcs and many other devices. This pinout can make a world of difference for successful rs232 serial communications. Although the rs232 25 pin configuration with a 25 way d type connector is very widely used in many applications the smaller 9 way d type connector is used in many applications.

The dte pc has the male connector shown below and the dce peripheral has the female. These nine pins are arranged in the port as shown in rs232 connector pinout. A computer s serial com port dte is usually a male port as shown below and any peripheral devices you connect to this port usually has a female connector dce. The table below contains some rules of thumb from experiments done by texas instruments years ago.

The 9 pin de 9 connector has been used by most ibm compatible pcs since the serial parallel adapter option for the pc at where it allowed a serial and parallel port to fit on the same card. Rs232 pinout below is the pinout of a typical standard male 9 pin rs232 connector this connector type is also referred to as a db9 connector. Rs232 used to have 25 pin now it is shrunk to just 9 pin. The maximum cable length for rs 232 is 50ft but in practise depends on baud rate cable specific capacitance and ambient noise.

Rs 232 is the common standard used in serial ports. Although rs232 is later replaced by faster usb universal serial bus it is still popular in some areas. Since pc serial port is based on rs 232 standard you may find signal details in the rs 232 interface pinout document. This use has been standardized as tia 574.

The dce and dte ports are exactly. Some miniaturized electronics particularly graphing calculators and hand held amateur and two way radio equipment have serial ports using a phone connector. First introduced in the 60s rs 232 is a protocol that defines how the data is transferred bit by bit from a data terminal equipment dte such as a computer terminal to data communication equipment dce such as a modem. It provides an obvious size and cost benefit.

Internal idc connnector wired to external port with a simple flat ribbon cable. New rs232 has nine pins as mentioned earlier. It defines the electrical.