Aalborg TIO Totalizer I/O Flow Monitor/Controller Manuel d'utilisateur télécharger pdf (Page 13)

RS-232 Communication Interface Connection:

Crossover connection must be established:

RS-232 RX

(pin 2 on the host PC DB9 connector)------pin 7 of the 9 pin "D" connector (TX-)

RS-232 TX

(pin 3 on the host PC DB9 connector)------pin 3 of the 9 pin "D" connector (RX+)

RS-232 SIGNAL GND

(pin 5 on the host PC DB9 connector)------pin 6 of the 9 pin "D" connector

RS-485 Communication Interface Connection:

The RS485 converter/adapter must be configured for: multidrop, 2 wire, half

duplex mode (See Figure 4.3). The transmitter circuit must be enabled by TD or

RTS (depending on which is available on the converter/adapter). Settings for the

receiver circuit should follow the selection made for the transmitter circuit in order

to eliminate echo.

RS-485 T(-) or R(-) ----------------- pin 7 of the 9 pin "D" connector (TX-)

RS-485 T(+) or R(+) ----------------- pin 3 of the 9 pin "D" connector (RX+)

RS-485 GND (if available) ----------------- pin 6 of the 9 pin "D" connector

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Aalborg TIO Totalizer I/O Flow Monitor/Controller Manuel d'utilisateur Page 13