![Amazon.com: Eletechsup 2 Channel Serial Port Relay Module DC 12V PC Computer USB RS232 DB9 RS485 UART Remote Control Switch Board for Smart Home (1) : Electronics Amazon.com: Eletechsup 2 Channel Serial Port Relay Module DC 12V PC Computer USB RS232 DB9 RS485 UART Remote Control Switch Board for Smart Home (1) : Electronics](https://m.media-amazon.com/images/I/61a+nANYc4L._AC_UF894,1000_QL80_.jpg)
Amazon.com: Eletechsup 2 Channel Serial Port Relay Module DC 12V PC Computer USB RS232 DB9 RS485 UART Remote Control Switch Board for Smart Home (1) : 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
![Amazon.com: IDEARACE Silent Gaming PC, Intel i5 CPU Personal Computer, 8GB RAM, 512GB SSD, Intel HD Graphics 4000, 4xCOM RS232, 4xUSB 3.0, 2xNICs, HD&VGA, Metal Case : Electronics Amazon.com: IDEARACE Silent Gaming PC, Intel i5 CPU Personal Computer, 8GB RAM, 512GB SSD, Intel HD Graphics 4000, 4xCOM RS232, 4xUSB 3.0, 2xNICs, HD&VGA, Metal Case : Electronics](https://m.media-amazon.com/images/I/7188Yz9scYL._AC_SS300_.jpg)
Amazon.com: IDEARACE Silent Gaming PC, Intel i5 CPU Personal Computer, 8GB RAM, 512GB SSD, Intel HD Graphics 4000, 4xCOM RS232, 4xUSB 3.0, 2xNICs, HD&VGA, Metal Case : Electronics
![ftdi USB rs232 to rj9 Serial Cable for pc Connect celestron nexstar eq6 Hand Control Cable handcontroller Serial Adapter Cable ftdi USB rs232 to rj9 Serial Cable for pc Connect celestron nexstar eq6 Hand Control Cable handcontroller Serial Adapter Cable](https://m.media-amazon.com/images/I/61SqHHO1QfL._AC_UF894,1000_QL80_.jpg)
ftdi USB rs232 to rj9 Serial Cable for pc Connect celestron nexstar eq6 Hand Control Cable handcontroller Serial Adapter Cable
![Amazon.com: Startech Add Four Rs232 Serial Ports To Any Notebook Or Desktop Computer Using A Single U : Electronics Amazon.com: Startech Add Four Rs232 Serial Ports To Any Notebook Or Desktop Computer Using A Single U : Electronics](https://m.media-amazon.com/images/I/61-agEZ7RYL.jpg)
Amazon.com: Startech Add Four Rs232 Serial Ports To Any Notebook Or Desktop Computer Using A Single U : Electronics
![Amazon.com: StarTech.com USB to Serial RS232 Adapter - DB9 - USB Serial Adapter - Prolific USB to Serial Adapter - 1-Port : Electronics Amazon.com: StarTech.com USB to Serial RS232 Adapter - DB9 - USB Serial Adapter - Prolific USB to Serial Adapter - 1-Port : Electronics](https://m.media-amazon.com/images/I/41tJCTJiPiL._AC_UF894,1000_QL80_.jpg)
Amazon.com: StarTech.com USB to Serial RS232 Adapter - DB9 - USB Serial Adapter - Prolific USB to Serial Adapter - 1-Port : Electronics
![Amazon.com: DTech Port Powered RS232 to RS232 Serial Port Isolator Optic Electric Adapter to Protect You PC and RS-232 Device : Electronics Amazon.com: DTech Port Powered RS232 to RS232 Serial Port Isolator Optic Electric Adapter to Protect You PC and RS-232 Device : Electronics](https://m.media-amazon.com/images/I/51UV9FbykeL._AC_UF350,350_QL80_.jpg)
Amazon.com: DTech Port Powered RS232 to RS232 Serial Port Isolator Optic Electric Adapter to Protect You PC and RS-232 Device : Electronics
![Amazon.com: RS232 Serial DB9 Male COM Port w/IDC Cable & Low Profile Bracket Slot Card for Compact Size PC Desktop Computer : Electronics Amazon.com: RS232 Serial DB9 Male COM Port w/IDC Cable & Low Profile Bracket Slot Card for Compact Size PC Desktop Computer : Electronics](https://m.media-amazon.com/images/I/41RiVR8Qb4L.jpg)
Amazon.com: RS232 Serial DB9 Male COM Port w/IDC Cable & Low Profile Bracket Slot Card for Compact Size PC Desktop Computer : Electronics
![Amazon.com: RS232 Serial DB9 Male COM Port w/IDC Cable & Low Profile Bracket Slot Card for Compact Size PC Desktop Computer : Electronics Amazon.com: RS232 Serial DB9 Male COM Port w/IDC Cable & Low Profile Bracket Slot Card for Compact Size PC Desktop Computer : Electronics](https://m.media-amazon.com/images/I/41RiVR8Qb4L._AC_UF894,1000_QL80_.jpg)
Amazon.com: RS232 Serial DB9 Male COM Port w/IDC Cable & Low Profile Bracket Slot Card for Compact Size PC Desktop Computer : Electronics
![Amazon.com: Waveshare RS232 Board SP3232 RS232 Communication Module Kit Development Board SP3232 COM/UART Port : Electronics Amazon.com: Waveshare RS232 Board SP3232 RS232 Communication Module Kit Development Board SP3232 COM/UART Port : Electronics](https://m.media-amazon.com/images/I/41D4RGcwJRL._AC_UF894,1000_QL80_.jpg)
Amazon.com: Waveshare RS232 Board SP3232 RS232 Communication Module Kit Development Board SP3232 COM/UART Port : Electronics
![Amazon.com: Syba IO Crest 4 Port PC-e x1 to Industrial DB9 com RS232 Converter Adapter Controller for Desktop PC with Low Bracket RS-232 Asix99100 Chipset SI-PEX15057 : Electronics Amazon.com: Syba IO Crest 4 Port PC-e x1 to Industrial DB9 com RS232 Converter Adapter Controller for Desktop PC with Low Bracket RS-232 Asix99100 Chipset SI-PEX15057 : Electronics](https://m.media-amazon.com/images/I/919Spno6AAL._AC_UF894,1000_QL80_.jpg)
Amazon.com: Syba IO Crest 4 Port PC-e x1 to Industrial DB9 com RS232 Converter Adapter Controller for Desktop PC with Low Bracket RS-232 Asix99100 Chipset SI-PEX15057 : Electronics
![Amazon.com: PCIE 2 Port Serial Expansion Card PCI Express to Industrial DB9 Serial / RS232 COM Port Adapter 16C550 UART WCH382 Chip for Desktop PC Windows 10 with Low Bracket : Electronics Amazon.com: PCIE 2 Port Serial Expansion Card PCI Express to Industrial DB9 Serial / RS232 COM Port Adapter 16C550 UART WCH382 Chip for Desktop PC Windows 10 with Low Bracket : Electronics](https://m.media-amazon.com/images/I/61le-7WTYpL._AC_UF894,1000_QL80_.jpg)
Amazon.com: PCIE 2 Port Serial Expansion Card PCI Express to Industrial DB9 Serial / RS232 COM Port Adapter 16C550 UART WCH382 Chip for Desktop PC Windows 10 with Low Bracket : Electronics
![Amazon.com: Serial 9Pin RS232 DB9 Motherboard Com Port Ribbon Cable Connector Bracket for PC : Electronics Amazon.com: Serial 9Pin RS232 DB9 Motherboard Com Port Ribbon Cable Connector Bracket for PC : Electronics](https://m.media-amazon.com/images/I/61jWVwjlcWL._AC_UF1000,1000_QL80_.jpg)
Amazon.com: Serial 9Pin RS232 DB9 Motherboard Com Port Ribbon Cable Connector Bracket for PC : Electronics
![Amazon.com: DTech Port Powered RS232 to RS232 Serial Port Isolator Optic Electric Adapter to Protect You PC and RS-232 Device : Electronics Amazon.com: DTech Port Powered RS232 to RS232 Serial Port Isolator Optic Electric Adapter to Protect You PC and RS-232 Device : Electronics](https://m.media-amazon.com/images/I/51H0T04EHeL._AC_UF894,1000_QL80_.jpg)
Amazon.com: DTech Port Powered RS232 to RS232 Serial Port Isolator Optic Electric Adapter to Protect You PC and RS-232 Device : Electronics
![RS232 - New USB to RS-232 (9-pin) Serial Cable w/25-pin Serial Adapter - Add a Serial Port to Your PC via USB RS232 - New USB to RS-232 (9-pin) Serial Cable w/25-pin Serial Adapter - Add a Serial Port to Your PC via USB](https://m.media-amazon.com/images/I/31d-PvHIKQL._AC_UF894,1000_QL80_.jpg)
RS232 - New USB to RS-232 (9-pin) Serial Cable w/25-pin Serial Adapter - Add a Serial Port to Your PC via USB
![Amazon.com: StarTech.com 1 Port RS232 to Ethernet IP Converter / Device Server - Aluminum - Serial over IP Device Server - Serial to IP Converter (NETRS2321P) : Electronics Amazon.com: StarTech.com 1 Port RS232 to Ethernet IP Converter / Device Server - Aluminum - Serial over IP Device Server - Serial to IP Converter (NETRS2321P) : Electronics](https://m.media-amazon.com/images/I/81Z190YXFVL._AC_UF894,1000_QL80_.jpg)
Amazon.com: StarTech.com 1 Port RS232 to Ethernet IP Converter / Device Server - Aluminum - Serial over IP Device Server - Serial to IP Converter (NETRS2321P) : Electronics
![Amazon.com: Startech Add Four Rs232 Serial Ports To Any Notebook Or Desktop Computer Using A Single U : Electronics Amazon.com: Startech Add Four Rs232 Serial Ports To Any Notebook Or Desktop Computer Using A Single U : Electronics](https://m.media-amazon.com/images/I/31MEGPI5ICL._AC_SY200_QL15_.jpg)
Amazon.com: Startech Add Four Rs232 Serial Ports To Any Notebook Or Desktop Computer Using A Single U : Electronics
![Amazon.com: DTECH 2-Port RS232 Serial Splitter Box COM Port Expander 1x2 with Power Adapter for Sharing PCs and Capture Data : Electronics Amazon.com: DTECH 2-Port RS232 Serial Splitter Box COM Port Expander 1x2 with Power Adapter for Sharing PCs and Capture Data : Electronics](https://m.media-amazon.com/images/I/61N60CxLC2L._AC_UF1000,1000_QL80_.jpg)
Amazon.com: DTECH 2-Port RS232 Serial Splitter Box COM Port Expander 1x2 with Power Adapter for Sharing PCs and Capture Data : Electronics
![Amazon.com: IDEARACE Silent Gaming PC, Intel i5 CPU Personal Computer, 8GB RAM, 512GB SSD, Intel HD Graphics 4000, 4xCOM RS232, 4xUSB 3.0, 2xNICs, HD&VGA, Metal Case : Electronics Amazon.com: IDEARACE Silent Gaming PC, Intel i5 CPU Personal Computer, 8GB RAM, 512GB SSD, Intel HD Graphics 4000, 4xCOM RS232, 4xUSB 3.0, 2xNICs, HD&VGA, Metal Case : Electronics](https://m.media-amazon.com/images/I/7188Yz9scYL._AC_UF894,1000_QL80_.jpg)
Amazon.com: IDEARACE Silent Gaming PC, Intel i5 CPU Personal Computer, 8GB RAM, 512GB SSD, Intel HD Graphics 4000, 4xCOM RS232, 4xUSB 3.0, 2xNICs, HD&VGA, Metal Case : Electronics
![DTech RS232 Splitter, 4 Port Serial Expansion Box 1x4 COM Port Expander with Power Adapter for Sharing PCs and Capture Data DTech RS232 Splitter, 4 Port Serial Expansion Box 1x4 COM Port Expander with Power Adapter for Sharing PCs and Capture Data](https://m.media-amazon.com/images/I/613iN0-rGZL._AC_UF1000,1000_QL80_.jpg)
DTech RS232 Splitter, 4 Port Serial Expansion Box 1x4 COM Port Expander with Power Adapter for Sharing PCs and Capture Data
![Amazon.com: KINGDEL Fanless Industrial PC, Windows 11 Pro Mini Computer with Intel i7 CPU, 8GB RAM, 512GB SSD, 2xNICs, 2xHD Ports, 4xUSB 3.0, 6xCOM RS232 : Electronics Amazon.com: KINGDEL Fanless Industrial PC, Windows 11 Pro Mini Computer with Intel i7 CPU, 8GB RAM, 512GB SSD, 2xNICs, 2xHD Ports, 4xUSB 3.0, 6xCOM RS232 : Electronics](https://m.media-amazon.com/images/I/61MeqPI8wpL._AC_UF894,1000_QL80_.jpg)
Amazon.com: KINGDEL Fanless Industrial PC, Windows 11 Pro Mini Computer with Intel i7 CPU, 8GB RAM, 512GB SSD, 2xNICs, 2xHD Ports, 4xUSB 3.0, 6xCOM RS232 : Electronics
![Siemens 6ED10571AA000BA0 , LOGO! PC Cable, DB9 RS232 PC connection: Electronic Components: Amazon.com: Industrial & Scientific Siemens 6ED10571AA000BA0 , LOGO! PC Cable, DB9 RS232 PC connection: Electronic Components: Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/51ZSgx8OHyL._AC_SY1000_.jpg)