{"product_id":"usb-to-rs485-converter-adapter-ch340-pl2303-ft232rl-modbus","title":"USB to RS-485 Converter Adapter — CH340 \/ PL2303 \/ FT232RL, Modbus RTU, Arduino","description":"\u003ch2\u003eUSB to RS-485 Converter Adapter - CH340 \/ PL2303 \/ FT232RL, Modbus RTU, Arduino\u003c\/h2\u003e\u003cp\u003eThis \u003cstrong\u003eUSB to RS-485 converter\u003c\/strong\u003e provides a plug-and-play interface between a PC USB port and RS-485 industrial networks. Using a reliable \u003cstrong\u003eCH340, PL2303, or FT232RL\u003c\/strong\u003e USB-to-UART bridge IC with RS-485 transceiver, it enables Modbus RTU communication, industrial sensor configuration, and RS-485 device programming from any Windows, Linux, or macOS computer.\u003c\/p\u003e\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUSB Bridge IC\u003c\/td\u003e\n\u003ctd\u003eCH340 \/ PL2303 \/ FT232RL (select variant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eUSB 2.0 (Full-Speed) to RS-485\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRS-485 Standard\u003c\/td\u003e\n\u003ctd\u003eEIA\/TIA-485 (half-duplex, 2-wire)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBaud Rate\u003c\/td\u003e\n\u003ctd\u003e300bps - 921600bps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRS-485 Terminals\u003c\/td\u003e\n\u003ctd\u003eA(+), B(-), GND screw terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Cable Length\u003c\/td\u003e\n\u003ctd\u003e1200m @ 100kbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Nodes\u003c\/td\u003e\n\u003ctd\u003e32 (standard) \/ 256 (with repeater)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDirection Control\u003c\/td\u003e\n\u003ctd\u003eAutomatic (hardware flow control)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-40C to +85C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOS Support\u003c\/td\u003e\n\u003ctd\u003eWindows 7-11, Linux, macOS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eUSB Bridge IC Comparison\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eIC\u003c\/th\u003e\n\u003cth\u003eDriver\u003c\/th\u003e\n\u003cth\u003eReliability\u003c\/th\u003e\n\u003cth\u003eBest For\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCH340\u003c\/td\u003e\n\u003ctd\u003eCH340 driver (free)\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003ctd\u003eBudget, Arduino projects\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePL2303\u003c\/td\u003e\n\u003ctd\u003ePL2303 driver\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003ctd\u003eGeneral use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFT232RL\u003c\/td\u003e\n\u003ctd\u003eFTDI VCP (built-in Win10+)\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003ctd\u003eIndustrial, professional use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eWhy Choose This Converter?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlug-and-Play\u003c\/strong\u003e - Recognized as virtual COM port; no configuration needed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuto Direction Control\u003c\/strong\u003e - Hardware automatically switches between transmit and receive; no RTS\/CTS needed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1200m Range\u003c\/strong\u003e - RS-485 differential signaling for long-distance industrial communication\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e32+ Node Support\u003c\/strong\u003e - Connect multiple RS-485 devices on one bus (Modbus RTU network)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eScrew Terminals\u003c\/strong\u003e - Secure wire connection for industrial installation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTypical Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eModbus RTU master\/slave communication (PLC, VFD, energy meter)\u003c\/li\u003e\n\u003cli\u003eIndustrial sensor and actuator configuration (RS-485 protocol)\u003c\/li\u003e\n\u003cli\u003eBuilding automation (BACnet MS\/TP, DALI over RS-485)\u003c\/li\u003e\n\u003cli\u003eSolar inverter and battery BMS monitoring\u003c\/li\u003e\n\u003cli\u003eArduino RS-485 network development and testing\u003c\/li\u003e\n\u003cli\u003eDMX512 lighting control interface\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWiring Guide\u003c\/h3\u003e\u003cp\u003eConnect A(+) terminal to RS-485 device A(+) wire. Connect B(-) to device B(-) wire. Connect GND to system ground (optional but recommended for noise immunity). Add 120 ohm termination resistor between A and B at each end of long cable runs.\u003c\/p\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ: What COM port does this adapter use?\u003c\/strong\u003e Windows assigns a virtual COM port (e.g., COM3, COM4) automatically after driver installation. Check Device Manager to find the assigned port number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Can this adapter communicate with Modbus RTU devices?\u003c\/strong\u003e Yes - use Modbus Poll, ModScan, or any Modbus RTU software. Set baud rate, parity, and stop bits to match the device (typically 9600\/19200 baud, 8N1 or 8E1).\u003c\/p\u003e\u003ch3\u003ePackage Contents\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e1x USB to RS-485 Converter Adapter\u003c\/li\u003e\u003c\/ul\u003e","brand":"Keszoox","offers":[{"title":"CH340 to RS485","offer_id":46991505424619,"sku":"14:1202#CH340 to RS485","price":5.16,"currency_code":"USD","in_stock":true},{"title":"FT232 To RS485","offer_id":46991505457387,"sku":"14:350852#FT232 To RS485","price":5.96,"currency_code":"USD","in_stock":true},{"title":"PL2303 To RS485","offer_id":46991505490155,"sku":"14:351074#PL2303 To RS485","price":5.56,"currency_code":"USD","in_stock":true},{"title":"USB to RS485 RS232","offer_id":46991505522923,"sku":"14:4044226#USB to RS485 RS232","price":13.76,"currency_code":"USD","in_stock":true},{"title":"USB to RS485","offer_id":46991505555691,"sku":"14:201659813#USB to RS485","price":8.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/usb-to-rs485-converter-module.webp?v=1761531294","url":"https:\/\/keszoox.com\/products\/usb-to-rs485-converter-adapter-ch340-pl2303-ft232rl-modbus","provider":"Keszoox","version":"1.0","type":"link"}