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Interfaces and Connectors

EPM-15 Reference Manual 35

Null Modem

The following diagram illustrates a typical DB9 to DB9 RS-232 null modem adapter.

System 1 <--> System 2

Name Pin Pin Name

------------------------------------

TX 3 <--> 2 RX

RX 2 <--> 3 TX

RTS 7 <--> 1 DCD

CTS 8

DSR 6 <--> 4 DTR

DCD 1 <--> 7 RTS

8 CTS

DTR 4 <--> 6 DSR

Pins 7 and 8 are shorted together on each connector. Unlisted pins have no connection.

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Sharp VL-A10K Informazioni Techniche Pagina 41