9 Pin Serial Cable Pinout Colors

For the most part they have been replaced by usb but older machinery still uses them.

9 pin serial cable pinout colors.

The ttl 232r cables are a family of usb to ttl serial uart converter cables incorporating ftdi s ft232rq usb to serial uart interface ic device which handles all the usb signalling and protocols. Some of the simpler systems just send the data without any hard wired handshaking and as a result the serial data cables required for this are very simple. Rs 232 maximum cable length. I m looking to splice wires from a db sub 9 pin connector out to a breadboard but i m getting different pictures for color coding which makes me confused.

Pinout and diagram of de9 connector db9 connector commonly used for serial ports rs 232. On a reverse cable the opposite is true. Thus it is important to understand how the 9 pin rs232 cable pinout can affect the flow of serial data between devices. What s more confusing is the connect i have only has 4 wires form the cable despite having 9 pins.

D sub 9 connector pinout. There are a few main types of serial cables. Pin 3 on standard db 9 and db 25. There is no standard color scheme.

The cables provide a fast simple way to connect devices with a ttl level serial interface to usb. One of the most common schemes is for the dte the pc to assert the rts signal if it is ready to send data and dce the modem to assert cts when it is able to receive data. Some devices use other rs 232 pins for flow control. This pinout can make a world of difference for successful rs232 serial communications.

Pin 2 on standard db 9 and db 25. Gnd signal ground pin 5 on standard db 9 and pin 7 on standard db 25 note that sometimes particular serial cables are wired in non standard way but this is very rare. Serial cables also called db or d sub d subminiature are a dying breed. Tx transmit connected to rx on the other end.

The maximum cable length for rs 232 is 50ft but in practise depends on baud rate cable specific capacitance and ambient noise. Rs232 serial port monitoring hardware stands out for a number of reasons including its 9 pin rs232 pinout. The colors red black brown and orange include some colors not listed in the color. Indeed there is a number of possible serial connectors.

Serial data cable diagrams and pin connections different data systems utilise different levels of handshaking when using rs232.