The Async RS-232 to RS-485 Interface Bidirectional Converter features a DB9 female connector on the RS-232 side, and a terminal blockor DB9 connector on the RS-485 side. It converts your unbalanced RS-232 signals to balanced half-duplex RS-485 signals.
Operation — 2-wire, half-duplex Transmitter Control — Data Power — From the interface Connectors —
IC1620A-F: DB9 to Terminal Block
IC1625A-F: DB9 to DB9