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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2 8

PCL-849 User's Manual

Page 27
Image 27
Advantech PCL-849 manual Rts Cts Gnd Dsr Dtr Dcd