Pinouts of various RS-232 cables. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Pinouts of various RS-232 cables. Encyclopedia of radio electronics and electrical engineering

Free technical library

Encyclopedia of radio electronics and electrical engineering / Computers

Comments on the article

Attention! This information has been collected from various sources. We are unable to verify the operation of all circuits and devices listed below and are not responsible for damage that may be caused to the equipment as a result of the use of these materials. However, we make every effort to ensure the accuracy of the information provided.

So, here we present standard and not very cable pinouts...

Symbols:

F - mother

M - dad

- - connection

x - no connection

+ - lines are combined.

________________________________

DTE 9 F <--> DCE 9 M

It is used to connect devices such as a computer and a modem.

Direct connection:

1 - 1

2 - 2

3 - 3

...

9 - 9

NOTE: Screens are connected.

________________________________

DTE 9 F <--> DTE 9 F (Null-modem 9)

It is used to connect devices such as a computer and a computer.

Establishing connection:

1+7-8

2 - 3

3 - 2

4 - 6

5 - 5

6 - 4

7+1 - 8

8 - 1+7

NOTE: Pins 1 and 7 on the connectors are interconnected.

9 is not used. The screens are connected.

________________________________

DTE 25 F <--> DCE 9 M

It is used to connect devices such as a computer (25-pin connector) and a 9-pin mouse (or modem).

Establishing connection:

2 - 3

3 - 2

4 - 7

5 - 8

6 - 6

7 - 5

8 - 1

20 - 4

22 - 9

NOTE: The rest are not used. The screens are connected.

________________________________

DTE 9 F <--> DCE 25 M

It is used to connect devices such as a computer (9-pin connector) and a 25-pin mouse (or modem).

Establishing connection:

1 - 8

2 - 3

3 - 2

4 - 20

5 - 7

6 - 6

7 - 4

8 - 5

9 - 22

NOTE: The rest are not used. The screens are connected.

________________________________

DTE 25 F <--> DCE 25 M

It is used to connect devices such as a computer (25-pin connector) and a 25-pin mouse (or modem).

Direct connection:

1 - 1

2 - 2

3 - 3

4 - 4

...

24 - 24

25 - 25

NOTE: Screens are connected.

________________________________

DTE 25 F <--> DTE 25 F (Null-modem Generic 25)

It is used to connect devices such as a computer (25-pin connector) and a computer (25-pin connector).

Establishing connection:

1 - 1

2 - 3

3 - 2

4 - 5

5 - 4

6+8 - 20

7 - 7

20 - 6+8

NOTE: The rest are not used. The screens are connected.

________________________________

Plug for COM port 9 pin F

Used for testing communication applications.

Establishing connection:

2 + 3

1 + 6 + 4

7 + 8

NOTE: The rest are not used.

________________________________

Plug for COM port 25 pin F

Used for testing communication applications.

Establishing connection:

2 + 3

4 + 5

6 + 8 + 20

NOTE: The rest are not used.

Publication: cxem.net

See other articles Section Computers.

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