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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Serial to WiFi Ethernet Wireless Converter RS232 RS485 Serial Server (USR-W610)
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Amazon.com: NOYITO RS232 to RS485 Signal Mutual Conversion Module Maximum Baud Rate 500kbps Supports Active and Passive Power Supply Over-Voltage and Over-Current Protection : Electronics
Amazon.com: RS232/RS485 Shield for Arduino : Electronics
Amazon.com: LFHUKEJI RS232 to RS485, RS-232 Female to RS-485/RS-422 485/422 Female Adapter Converter(Passive) : Electronics
USR-TCP232-410s RS232 / RS485 Serial to Ethernet Adapter/IP Device Server Ethernet Converter Support DHCP/DNS
