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4 Port USB2.0 to Serial RS232 DB9 Splitter 4 com to usb2.0 RS-232 cable
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  • $94.96 
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External-powered RS-232 to RS-485/422 Mini-size PhotoElectric Isolation
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  • $53.75 
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PCI to 2 Ports RS485/422 PCI Card Optical Isolation Surge protection 1053 Chip
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  • $53.75 
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