Note that pin 3 rs232 vdd is the power pin for the serial port signals. Lead, halogen and antimony free, rohs compliant green device notes 2 and 4. Siemens simatic 505 programmable controller serial cable with a 9 pin femaletomale gender changer. Multiple rs232 drivers and receivers stmicroelectronics. Rs232 pin description, microcontroller interfacing and. Pin diagram and description of max 232 ic by siongboon. Single channel single output, very low power miniature vehicle detector model np2esl features. Max220max232max232a pin configuration and typical operating circuit. You can build an rs232 cable using the diagram above, except the gender of the rmcend connector should be reversed. The rs485 driver is automatically enabled during each spacing state on the rs232 side. The interface is two types db9 and db25 pin connectors. Connector and cable diagrams pinout charts 6 connector and cable diagrams pinout charts table 6. Allenbradley plc serial cable with a 9 pin femaletomale gender changer.
Serial adapters free delivery possible on eligible purchases. The default rs485 configuration is fullduplex, but halfduplex operation can be obtained by tying together the tx and ri pins, and the txen and rxen signals. Figure 1 also illustrates the pin numbering used in the original. The cables provide a fast, simple way to connect devices with a ttl level serial interface to usb. Although the original specification was intended for modems, subsequent. Figure1 depicts rs232 pin diagrams for db9 connector. The st75185c contains three drivers and five receivers. The max3221 is a 1driver1receiver 16pin ssop version of the 20pin 2driver2receiver.
Figure 2 depicts rs232 pin diagrams for db25 connector. The ttl232r cables are a family of usb to ttl serial uart converter cables incorporating ftdis ft232rq usb to serial uart interface ic device which handles all the usb signalling and protocols. Follow the wiring diagram in figure1 to connect to a 2wire halfduplex network. The interface is mainly used for one to one serial communication for example computer to dial up modem connection. Ttl232r ttl to usb serial converter range of cables datasheet. As shown in the figure, it carries both data and control signal.
The rs232 interface is the electronic industries association eia standard for the interchange. Ultra compact rs232 to ttl converter with male db9 3. Rs232 quick guide tiaeia 232 f standard rs232 conveys data over a simple unterminated, multiconductor cable at rates up to 20kb. Single channel single output, very low power miniature.
A modem cable has pintopin connections, and is designed to connect a dte device to a dce device. The pinout matches the db9s connector design in order to decrease the part count, reduce. Thus the max 232 ic can be used as an intermediate connection between microcontroller and a computer. Rs232 pin diagram pdf the modules will replace pin for pin a male or female db9 rs232 connector with a usb. In telecommunications, rs232, recommended standard 232 is a standard originally. Learn how to use max232 ic, with details like pin diagram, description, example circuit, features and pdf datasheet. Rs232 pin connection reference for reference only, and only for qualified personnel. Click here for production status of specific part numbers. The receiver input pin receives 232 standard input from the rs232 port and accordingly the corresponding receiver output pin gives the ttl standard output to the microcontroller.
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