Advantech 4-Port RS-232 Interface card PCL-849 Uživatelský manuál stáhnout pdf (Strana 27)

28 PCL-849 User's Manual

Modem connections

DB-25 Male: PCL-849 Modem (DCE)

Pin Signal Pin Signal

2 TxD 2 RxD

3 RxD 3 TxD

4 RTS 4 CTS

5 CTS 5 RTS

6 DSR 6 DTR

7 GND 7 GND

20 DTR 20 DSR

8 DCD 8 DCD

For DTE to DCE connections, use straight through cable (i.e., you

don't have to reverse lines 2 and 3, lines 4 and 5, and lines 6 and 20

since, in general, the DCE RS-232 interfaces are reversed them-

selves).

Terminal without handshake

DB-25 Male: PCL-849 Terminal, PC (DTE)

Pin Signal Pin Signal

2 TxD 3 RxD

3 RxD 2 TxD

4 RTS —

5 CTS —

7 GND 7 GND

6 DSR —

20 DTR —

8 DCD —

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 33

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Advantech 4-Port RS-232 Interface card PCL-849 Uživatelský manuál Strana 27