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RS232 to RS485 Interface Communication Data Signal Passive Converter Adapter | eBay
RS232 to RS485 converter adapter
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RS232 to RS485
9Pin DB9 Solderless Terminal Female/ Male RS232 RS485 Adapter Connector
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RS232 to RS485 Converter, Large Selection of Reliable RS485 Converters
StarTech.com 2-Port USB to RS232 RS422 RS485 Serial Adapter with (ICUSB2324852)
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StarTech.com 8 Port Serial Hub USB to RS232/RS485/RS422 Adapter, Industrial USB 2.0 to DB9 Serial Converter Hub, IP30 Rated, Din Rail Mountable Metal Serial Hub, 15kV ESD Protection - 6ft Locking Cable
UOTEK Mini RS-232 to RS-485 Converter RS232 To RS485 Conversion Adapter DB9 Connector Bidirectional Transmission UT-2201 - Newegg.com
Serial RS485 / RS422 WiFi adapter
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USR-TCP232-410s RS232 / RS485 Serial to Ethernet Adapter/IP Device Server Ethernet Converter Support DHCP/DNS (USR-TCP232-410S) - Newegg.com
USB To RS485 Adapter, Adapter Cable Compatible With RS232 RS485 RS422 Standards USB To RS485 Converter, For Data Transmission - Walmart.com
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25-pin Opto-Isolated RS232 to RS485 / RS422 Converter (Industrial / Po – CommFront