Advantech PCI-1625U user manual Wiring, 5 Terminal or PC DTE Connections

Models: PCI-1625U

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5.2 Wiring

5.2 Wiring

Since the RS-232 interface is not strictly defined, many devices have their own connection methods, which may ignore some signal lines or define reserved lines for other functions. It is best to refer to the user manual of your device for installation instructions. You may find the following helpful.

In general, DTE (Data Terminal Equipment) refers to the device that is leading the communication. Examples include PCs, terminals and some printers. DCE refers to the device being communicated with or con- trolled. Examples include modems, DSU’s (digital service units), printers and lab/factory equipment. In some situations, you may be able to get by with just three lines: data on RxD, TxD and ground.

Table 5.5: Terminal or PC (DTE) Connections

DB25 Male

DB25 Male or Female: Terminal

 

 

 

 

Pin

Signal

Pin

Signal

 

 

 

 

2

TxD

3

RxD

 

 

 

 

3

RxD

2

TxD

 

 

 

 

4

RTS

5

CTS

 

 

 

 

5

CTS

4

RTS

 

 

 

 

6

DSR

20

DTR

 

 

 

 

7

GND

7

GND

 

 

 

 

20

DTR

6

DSR

 

 

 

 

8

DCD

8

DCD

 

 

 

 

PCI-1625U User Manual

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Advantech PCI-1625U user manual Wiring, 5 Terminal or PC DTE Connections