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| Best Seller  | Add extra COM ports to your laptop or desktop computer quickly and easily. This USB to RS232/422/485 serial adapter lets you connect to your serial devices through an external USB port. Supports multiple serial protocols The versatile serial adapter... more | FREE shipping go to store |
 | USB To RS485 Converter Communication Module W/ TVS Transient Protection Features: * brand new and high quality *Made of high quality material and practical to use *All use chips. *With stronger anti-interference ability and safer use *Use CH340E chip no crystal oscillator more stable performance *Industrial protection: TVS... more | go to store |
| Best Seller  | USB To RS485 Converter Communication Module W/ TVS Transient Protection Features: * brand new and high quality *Made of high quality material and practical to use *All use chips. *With stronger anti-interference ability and safer use *Use CH340E chip no crystal oscillator more stable performance *Industrial protection: TVS... more | $7.49 $5.47 go to store |
 | USB To RS485 Converter Communication Module W/ TVS Transient Protection Features: * brand new and high quality *Made of high quality material and practical to use *All use chips. *With stronger anti-interference ability and safer use *Use CH340E chip no crystal oscillator more stable performance *Industrial protection: TVS... more | go to store |
 | Usb To Rs485 Converter Communication Module W/ Tvs Transient Protection Features: * brand new and high quality *Made of high quality material and practical to use *All use chips. *With stronger anti-interference ability and safer use *Use CH340E chip no crystal oscillator more stable performance *Industrial protection: TVS... more | $6.76 $4.86 go to store |
 | Embedded Thermal Receipt Printer 58MM Mini Printing Module Low Noise with USB/RS232/TTL Serial Port Support ESC/POS Commands for Weighing Apparatus Cash Register Self-Service Terminal: Adopt industrial printing head stable performance good printing... more | $29.59 $25.99 FREE shipping go to store |
 | RFID Time Attendance Clock + ID Card Reader + TCPIP + USB Recorder Effortless Employee Onboarding User capacity:10 000 Transaction Storage:100 000 Verification mode:ID/Optional IC card;Password Response time:<0.8 second Communication:RS232/RS485/TCPIP more | FREE shipping go to store |
 | RFID Time Attendance Clock + ID Card Reader + TCPIP + USB Recorder User capacity:10 000 Transaction Storage:100 000 Verification mode:ID/Optional IC card;Password Response time:<0.8 second Communication:RS232/RS485/TCPIP more | FREE shipping go to store |
 | StarTech.com USB to RS-232/422/485 Serial Adapter - 8 Port - Industrial - 15 kV ESD Protection - USB Add extra COM ports to your laptop or desktop computer, quickly and easily. This USB to RS232/422/485 serial adapter lets you connect to your serial devices through an external USB port. Supports multiple serial protocols The versatile serial adapter... more | compare prices |
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