![Amazon.com: 30cm DB9 Y Splitter Cable DB9 9 Pin 1 Male to 2 Female Rs232 Serial Splitter Adapter Straight-Through Cable YOUCHENG for Connect Various Serial Interface Devices : Electronics Amazon.com: 30cm DB9 Y Splitter Cable DB9 9 Pin 1 Male to 2 Female Rs232 Serial Splitter Adapter Straight-Through Cable YOUCHENG for Connect Various Serial Interface Devices : Electronics](https://m.media-amazon.com/images/I/61MoBAUeptL._AC_UF1000,1000_QL80_.jpg)
Amazon.com: 30cm DB9 Y Splitter Cable DB9 9 Pin 1 Male to 2 Female Rs232 Serial Splitter Adapter Straight-Through Cable YOUCHENG for Connect Various Serial Interface Devices : Electronics
![Amazon.com: StarTech.com Serial DB9 RS232 Extender over Cat 5 - Up to 3300 ft (1000 meters) (RS232EXTC1),Silver : Electronics Amazon.com: StarTech.com Serial DB9 RS232 Extender over Cat 5 - Up to 3300 ft (1000 meters) (RS232EXTC1),Silver : Electronics](https://m.media-amazon.com/images/I/51CsjuK6lDL.jpg)
Amazon.com: StarTech.com Serial DB9 RS232 Extender over Cat 5 - Up to 3300 ft (1000 meters) (RS232EXTC1),Silver : Electronics
![Amazon.com : YARONGTECH 125KHZ Waterproof RS232 Interface Door Access Control RFID Reader : Electronics Amazon.com : YARONGTECH 125KHZ Waterproof RS232 Interface Door Access Control RFID Reader : Electronics](https://m.media-amazon.com/images/I/51gcUAsyvBL._AC_UF894,1000_QL80_.jpg)
Amazon.com : YARONGTECH 125KHZ Waterproof RS232 Interface Door Access Control RFID Reader : Electronics
![Waveshare USB to RS232 / RS485 / TTL Industrial Isolated Converter with Original FT232RL Embedded Protection Circuits and Aluminium Alloy Enclosure for Industrial Control Equipments Waveshare USB to RS232 / RS485 / TTL Industrial Isolated Converter with Original FT232RL Embedded Protection Circuits and Aluminium Alloy Enclosure for Industrial Control Equipments](https://m.media-amazon.com/images/I/61gPi2PJddL._AC_UF894,1000_QL80_.jpg)
Waveshare USB to RS232 / RS485 / TTL Industrial Isolated Converter with Original FT232RL Embedded Protection Circuits and Aluminium Alloy Enclosure for Industrial Control Equipments
![RS-232 Interface IC RS232 2Tx/2Rx temp -40C to 85C (100 pieces): Amazon.com: Industrial & Scientific RS-232 Interface IC RS232 2Tx/2Rx temp -40C to 85C (100 pieces): Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/41lpWUEYMsL._AC_UF894,1000_QL80_.jpg)
RS-232 Interface IC RS232 2Tx/2Rx temp -40C to 85C (100 pieces): Amazon.com: Industrial & Scientific
![Amazon.com: Naroote Módulo de relé, interfaz RS232, interruptor de control remoto multifuncional con indicador LED para automatización para hogar inteligente (sin carcasa) : Industrial y Científico Amazon.com: Naroote Módulo de relé, interfaz RS232, interruptor de control remoto multifuncional con indicador LED para automatización para hogar inteligente (sin carcasa) : Industrial y Científico](https://m.media-amazon.com/images/I/71LH-wyywYL._AC_UF1000,1000_QL80_.jpg)
Amazon.com: Naroote Módulo de relé, interfaz RS232, interruptor de control remoto multifuncional con indicador LED para automatización para hogar inteligente (sin carcasa) : Industrial y Científico
![Amazon.com: CERRXIAN RS232 to Ethernet Serial Device Server, 1 Port RS 232 DB9 Serial to Ethernet TCP IP Device Server Converter : Electronics Amazon.com: CERRXIAN RS232 to Ethernet Serial Device Server, 1 Port RS 232 DB9 Serial to Ethernet TCP IP Device Server Converter : Electronics](https://m.media-amazon.com/images/I/716hFwDD8fL._AC_UF894,1000_QL80_.jpg)
Amazon.com: CERRXIAN RS232 to Ethernet Serial Device Server, 1 Port RS 232 DB9 Serial to Ethernet TCP IP Device Server Converter : Electronics
![RS-232 Interface IC RS232 3V 3D/5R 15KV 1MBPS E-DWN28SSOP CM (50 pieces): Amazon.com: Industrial & Scientific RS-232 Interface IC RS232 3V 3D/5R 15KV 1MBPS E-DWN28SSOP CM (50 pieces): Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/41k1iKqOSQL._AC_UF894,1000_QL80_.jpg)
RS-232 Interface IC RS232 3V 3D/5R 15KV 1MBPS E-DWN28SSOP CM (50 pieces): Amazon.com: Industrial & Scientific
![Waveshare USB to RS232 / RS485 / TTL Industrial Isolated Converter with Original FT232RL Embedded Protection Circuits and Aluminium Alloy Enclosure for Industrial Control Equipments Waveshare USB to RS232 / RS485 / TTL Industrial Isolated Converter with Original FT232RL Embedded Protection Circuits and Aluminium Alloy Enclosure for Industrial Control Equipments](https://m.media-amazon.com/images/I/715A6uZss0L.jpg)
Waveshare USB to RS232 / RS485 / TTL Industrial Isolated Converter with Original FT232RL Embedded Protection Circuits and Aluminium Alloy Enclosure for Industrial Control Equipments
![Amazon.com: Black Box Async RS232 a RS-422 interfaz convertidor bidireccional, DB9 hembra a DB9 hembra : Electrónica Amazon.com: Black Box Async RS232 a RS-422 interfaz convertidor bidireccional, DB9 hembra a DB9 hembra : Electrónica](https://m.media-amazon.com/images/I/711JNMAB4+L._AC_UF894,1000_QL80_.jpg)
Amazon.com: Black Box Async RS232 a RS-422 interfaz convertidor bidireccional, DB9 hembra a DB9 hembra : Electrónica
![Waveshare USB to RS232 / RS485 / TTL Industrial Isolated Converter with Original FT232RL Embedded Protection Circuits and Aluminium Alloy Enclosure for Industrial Control Equipments Waveshare USB to RS232 / RS485 / TTL Industrial Isolated Converter with Original FT232RL Embedded Protection Circuits and Aluminium Alloy Enclosure for Industrial Control Equipments](https://m.media-amazon.com/images/I/71A2HmdK0RL.jpg)
Waveshare USB to RS232 / RS485 / TTL Industrial Isolated Converter with Original FT232RL Embedded Protection Circuits and Aluminium Alloy Enclosure for Industrial Control Equipments
![Serial Port Complete: Programming and Circuits for Rs-232 and Rs-485 Links and Networks: Axelson, Jan: 9780965081924: Amazon.com: Books Serial Port Complete: Programming and Circuits for Rs-232 and Rs-485 Links and Networks: Axelson, Jan: 9780965081924: Amazon.com: Books](https://m.media-amazon.com/images/I/51z1nUkwCGL._AC_UF350,350_QL50_.jpg)
Serial Port Complete: Programming and Circuits for Rs-232 and Rs-485 Links and Networks: Axelson, Jan: 9780965081924: Amazon.com: Books
![Amazon.com: Wireless Reader Module, IC-RS232 Interface Reader High Sensitivity High Stability Reader Module, for Condominium Company : Industrial & Scientific Amazon.com: Wireless Reader Module, IC-RS232 Interface Reader High Sensitivity High Stability Reader Module, for Condominium Company : Industrial & Scientific](https://m.media-amazon.com/images/I/61TczeB2OUL._AC_UF894,1000_QL80_.jpg)
Amazon.com: Wireless Reader Module, IC-RS232 Interface Reader High Sensitivity High Stability Reader Module, for Condominium Company : Industrial & Scientific
![Amazon.com: Sysly 1747-UIC USB to DH485 RS485 RS232 Interface Converter Repalcement for Allen Bradley Programming Cable : Electronics Amazon.com: Sysly 1747-UIC USB to DH485 RS485 RS232 Interface Converter Repalcement for Allen Bradley Programming Cable : Electronics](https://m.media-amazon.com/images/I/71FXVT4-G6L._AC_UF1000,1000_QL80_.jpg)
Amazon.com: Sysly 1747-UIC USB to DH485 RS485 RS232 Interface Converter Repalcement for Allen Bradley Programming Cable : Electronics
![Amazon.com: EZSync USB-to-RS232 Serial Interface Programming Control Cable for Skywatcher and Orion Telescope, Connect to Hand Control, FTDI chip, 6P4C, RJ11/RJ12, 6 feet, EZSync726 : Electronics Amazon.com: EZSync USB-to-RS232 Serial Interface Programming Control Cable for Skywatcher and Orion Telescope, Connect to Hand Control, FTDI chip, 6P4C, RJ11/RJ12, 6 feet, EZSync726 : Electronics](https://m.media-amazon.com/images/I/71qLma0WVTS._AC_UF1000,1000_QL80_.jpg)
Amazon.com: EZSync USB-to-RS232 Serial Interface Programming Control Cable for Skywatcher and Orion Telescope, Connect to Hand Control, FTDI chip, 6P4C, RJ11/RJ12, 6 feet, EZSync726 : Electronics
![Serial Port Complete: Programming and Circuits for Rs-232 and Rs-485 Links and Networks: Axelson, Jan: 9780965081924: Amazon.com: Books Serial Port Complete: Programming and Circuits for Rs-232 and Rs-485 Links and Networks: Axelson, Jan: 9780965081924: Amazon.com: Books](https://m.media-amazon.com/images/I/51kajgzW9uL._AC_UF1000,1000_QL80_.jpg)
Serial Port Complete: Programming and Circuits for Rs-232 and Rs-485 Links and Networks: Axelson, Jan: 9780965081924: Amazon.com: Books
![Amazon.com: YARONGTECH RS232 Interface RFID 125KHZ TK4100 EM4100 Contactless Proximity Smart Card Desktop Reader : Electronics Amazon.com: YARONGTECH RS232 Interface RFID 125KHZ TK4100 EM4100 Contactless Proximity Smart Card Desktop Reader : Electronics](https://m.media-amazon.com/images/I/61brDFazR3L._AC_UF894,1000_QL80_.jpg)
Amazon.com: YARONGTECH RS232 Interface RFID 125KHZ TK4100 EM4100 Contactless Proximity Smart Card Desktop Reader : Electronics
![Amazon.com: uxcell RS232 to RS485 Communication Data Interface Converter Adapter w Terminal Board : Electronics Amazon.com: uxcell RS232 to RS485 Communication Data Interface Converter Adapter w Terminal Board : Electronics](https://m.media-amazon.com/images/I/61FnUOqzSIL._AC_UF894,1000_QL80_.jpg)
Amazon.com: uxcell RS232 to RS485 Communication Data Interface Converter Adapter w Terminal Board : Electronics
![Waveshare USB to RS232 / RS485 / TTL Industrial Isolated Converter with Original FT232RL Embedded Protection Circuits and Aluminium Alloy Enclosure for Industrial Control Equipments Waveshare USB to RS232 / RS485 / TTL Industrial Isolated Converter with Original FT232RL Embedded Protection Circuits and Aluminium Alloy Enclosure for Industrial Control Equipments](https://m.media-amazon.com/images/I/61r8OZj3+ZL.jpg)
Waveshare USB to RS232 / RS485 / TTL Industrial Isolated Converter with Original FT232RL Embedded Protection Circuits and Aluminium Alloy Enclosure for Industrial Control Equipments
![RS-232 Interface IC RS232 no externl cap temp 0C to 70C (5 pieces): Amazon.com: Industrial & Scientific RS-232 Interface IC RS232 no externl cap temp 0C to 70C (5 pieces): Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/31StDcPrMdL.jpg)
RS-232 Interface IC RS232 no externl cap temp 0C to 70C (5 pieces): Amazon.com: Industrial & Scientific
![RS-232 Interface IC RS232 3V 1D/1R AUTO DWN 16TSSOP COM (100 pieces): Amazon.com: Industrial & Scientific RS-232 Interface IC RS232 3V 1D/1R AUTO DWN 16TSSOP COM (100 pieces): Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/41rMAfX0DLL._AC_UF894,1000_QL80_.jpg)
RS-232 Interface IC RS232 3V 1D/1R AUTO DWN 16TSSOP COM (100 pieces): Amazon.com: Industrial & Scientific
![Amazon.com : RS232 Tester Serial DB9 Interface Port Mini Analyzer Loop Back with LED Indicator : Electronics Amazon.com : RS232 Tester Serial DB9 Interface Port Mini Analyzer Loop Back with LED Indicator : Electronics](https://m.media-amazon.com/images/I/71zowD84o1L._AC_UF894,1000_QL80_.jpg)
Amazon.com : RS232 Tester Serial DB9 Interface Port Mini Analyzer Loop Back with LED Indicator : Electronics
![Amazon.com: RS232 to RS485, RS-232 Female to RS-485/RS-422 485/422 Female Adapter Converter Data Communication Interface Connecter for POS, Access Control, Etc. : Electronics Amazon.com: RS232 to RS485, RS-232 Female to RS-485/RS-422 485/422 Female Adapter Converter Data Communication Interface Connecter for POS, Access Control, Etc. : Electronics](https://m.media-amazon.com/images/I/81IV0yC-dHL._AC_UF1000,1000_QL80_.jpg)