Rotronic MBW 473 Manual do Utilizador descarregar pdf (Página 39)

MBW473_MANUAL_E_V2.0 35

6 Remote Communication

The 473 is equipped with a bidirectional RS-232 communications interface which allows connection to

a computer. This section provides the necessary information for the use of the interface, including the

hardware connections, communications settings, and the command syntax.

6.1 Hardware Connection and Cabling

Connect a computer to the 473 using a standard RS-232 9-pin extender cable. The extender cable

has a male connector on one end and a female connector on the other. If your computer has a 25-pin

serial port connector rather than a 9-pin connector, you will also need a 25-pin to 9-pin port adapter.

Both the 9-pin RS-232 extender cable and the 25-pin to 9-pin port adapter are commonly available at

most computer hardware dealers.

The 473 ignores the DSR and CTS handshaking signals. While there is no harm in connecting all 9

pins, the 473 only requires connection of three of the pins (pins 2=TxD, 3=RxD and 5=GND). For your

reference, the complete connector pin-out is listed in the following table. Note that the signals identi-

fied by * are required, while the others are optional.

Signal

473

(9 pin)

Direction

Computer

(9 pin)

Computer

(25 pin)

*TxD



*RxD



DSR



*GND

 

DTR



CTS



RTS



* Denotes a required connection. All others are optional.

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Rotronic MBW 473 Manual do Utilizador Página 39