Serial Communication: Serial Ports 1 And 2; Rs232 - Only Serial Port 1; Operation Without The Modem Control Signals Dtra, Ctsa, Rtsa, Dcda, Dsra, Ria; Operation With The Modem Control Signals Dtra, Ctsa, Rtsa, Dcda, Dsra, Ria - Addi-Data ADDICOM PA 7400 Series Technical Description

PA 7400
8.3

Serial communication: serial ports 1 and 2

You can control the communication on serial ports 1 and 2 as follows:
•
either through commands of the operating system
•
or by programming directly the component DUART 16C452
(option U: DUART 16C552).

8.3.1 RS232 - Only serial port 1

Operation without the modem control signals DTRA, CTSA, RTSA, DCDA, DSRA, RIA

•
If the communication software does not support the control of the modem
control signals,
è the following cabling is sufficient.

Fig. 8-2: Operation without modem control signals

Operation with the modem control signals DTRA, CTSA, RTSA, DCDA, DSRA, RIA

•
If the communication software supports the control of the modem control
signals,
•
If the cabling is limited to the connection of the RxD, TxD and GND lines,
è connect the modem control signals as follows to the connector.
RTSA → CTSA
DTRA → DSRA → DCDA → RIA
34
Technical description Chapter 8