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USB 2.0 to 4 Ports Serial RS-232 COM DB9 Male Adapter Cable FTDI chip FT232 USB-4x RS232
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  • $103.99 
  • Free Shipping
OIKWAN Serial Adapter with Different Port Apply to Various System
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  • $56.99 
  • $5.99 Shipping
Coolgear 2 Port USB to RS-422/485 Optical Isolated Adapter
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  • $291.99 
  • Free Shipping
DB9 Male RS232 to RS485 RS422 Adapter Converter D-Sub DB9 RS232 to RS485 RS422 converter
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  • $116.99 
  • Free Shipping
DTECH Industrial Grade RS232 to RS485 Converter Adapter Optical Isolation Protector with TX RX LED Lights for Long Haul Serial Communication
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  • $26.88 
  • Free Shipping
  • $25.68 - $26.88