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USB to 2-Port RS-232, RS-422, RS-485 (Software Configurable) DB9 Serial Interface Adapter - Sealevel
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Usb 2.0 To Rs485 Rs-485 Db9 Com Serial Port Device Converter Adapter Cable High Speed Pl2303 Usb2.0 5mbp Cord 70cm Dropship - Pc Hardware Cables & Adapters - AliExpress
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