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RS232 to RS485 Passive Interface Adapter with Terminal Board A RS232 to RS485 Communication Converter Adapter.RS232 Communication Converter is widely used in industrial automation, door safe, all:in:one:card, car parking, ATM, bus charge, eatery sell out, staff attendance management, and highway toll gate, etc. Compatible with EIA or TIA RS:232C. RS485 standard. Interface RS232 side: DB9 female connector. Interface RS485 side: DB9 male connector with terminal board. Working mode: asynchronous, half: Duplex, differential transmission. Transmission media: double wire or Shielding double Line. Transmission rate: 300: 115200bps, which the RS485 Communication Converter is capable of applying between host computers, host computer and its external equipments and forms point to point, point to multi:points network. Package list: 1 * DB9 Female RS232 to RS485 Communication Converter 1 * Terminal Board