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$197.95 
Convert async RS232 to RS485 at speeds up to 115.2 kbps with distances up to 4000 ft. Operates in half- or full-duplex over two or four wires. Works with or without transmit"echo." Also available in four other configurations. See Similar Products. The Async RS-232 to RS-485 Interface Bidirectional Converter, DB9 Female to DB9 Female, features a DB9 female connector on the RS-232 side, and a DB9 female on the RS-485 side. It converts your unbalanced RS-232 signals to balanced half-duplex RS-485 signals.
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