Rs 422 Cable Pinout Db9

For rs 422 485 connect pins 5 to 20 and 7 to 22.

Rs 422 cable pinout db9.

Pinout connects to db9 and db25 connectors with 2 and 4 contacts. Below is the pinout of a typical standard male 9 pin rs232 connector this connector type is also referred to as a db9 connector. Figure 3 is an rs485 wiring diagram for rs485 pinout db9 connectors. 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.

9 pin rs485 pinout. Figure 4 is a pin diagram for both 25 pin rs485 pinout half duplex and full duplex pinout connectors. The maximum cable length for rs 232 is 50ft but in practise depends on baud rate cable specific capacitance and ambient noise. The 2106 usb serial adapter provides a single rs 422 serial port that simplifies adding usb connectivity to legacy non usb rs 422 applications via a standard db9m connector.

The strange thing is that i didn t find a standard pinout for the db9 connector used for the rs 422. The diagrams below show how sony s rs 422 db9 connector is used for serial communications. This table shows the pinout for rs 232 crossover cable wiring and can be used when creating a custom cable. Rs422 serial port connector pin layout.

Rs 422 uses a straight through cable. Db25 signal db9 definition 1 protective ground 2 txd 3 transmitted data 3 rxd 2 received data. To perform a loopback test with no hardware flow control with a db 25 connector connect pins 2 to 3 for rs 232. Sony rs 422 db9 pinout.

The adapter incorporates rugged molded connectors that improve reliability in automation factory floor industrial and mobile applications. Rs232 pinout rs232 pinout standards exist for both db9 and db25 connectors as shown below. Rs 232 422 rs 232 requires a null modem cable wired as a crossover cable. Most of the pins on db 25 connectors are not connected since only nine pins are used for rs 232 rs 422 and rs 485 communication.

Rs 422 is a serial communications standard that provides asynchronous communication capabilities such as hardware flow control software flow control and parity check. So i checked the manufacturer of the rs 422 pci card in my pc and found their own pinout which means that my test board can only be interfaced to this rs 422 from this manufacturer and won t work on solutions from others. How far will rs422 485 communicate. The table below contains some rules of thumb from experiments done by texas instruments years ago.

How do i set my rs422 485 device into half duplex mode. Rs485 pin configuration for db 25. The dte pc has the male connector shown below and the dce peripheral has the female. It has been widely used for decades.