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Amazon.com: DTECH RS232 to RS485 / RS422 Serial Communication Data Converter Adapter Mini-Size : Electronics
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StarTech.com USB to Serial Adapter - 2 Port - RS232 RS422 RS485 - COM Port Retention - FTDI USB to Serial Adapter - USB Serial (ICUSB2324852)
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Amazon.com: DTECH RS232 to RS485 / RS422 Serial Communication Data Converter Adapter Mini-Size : Electronics
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4 Serial Port RS232/RS485/RS422 to Ethernet Converter
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: DTECH RS232 to RS485 / RS422 Serial Communication Data Converter Adapter Mini-Size : Electronics
Amazon.com: DTech RS232 to RS485 Serial Converter Adapter with 4 Position Terminal Block for Industrial Long Haul Communication Data Supports 600W Anti-Surge : Electronics
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Amazon.com: NGW-1set Low Cost TCP/IP to RS485 RS232 to Ethernet Converter with Modbus RTU 410s : Electronics
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Amazon.com: SMAKN RS232 to RS485 Db 9 Pin Interface Converter Transmitter : Electronics
Amazon.com: Sintech RS232 to RS485 RS422 RS-485-422 Converter : Electronics
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