Null Modem Adapter

Adapter is a hardware device or software component, that converts transmitted data from one presentation form to another. The data presentation can be, for example, a message sent between objects in an application, or a packet sent through a network. A null modem adapter will enable you to use a normal serial cable as a null modem. It contains the necessary crosslinks between the signals. A null modem adapter converts any straight-through wired cable with connectors into a null modem "cross-wired" configuration, suitable for many serial PC to PC, and PC to printer, applications.

25 pin female connector

 

25 pin male connector

 25 pin D-Sub Male

Null Modem Adapter Pinout

Signal

Female

Male

 

Shield Ground

1

1

Shield Ground

Transmit Data

2

3

Receive Data

Receive Data

3

2

Transmit Data

Request to Send

4

5

Clear to Send

Clear to Send

5

4

Request to Send

Data Set Ready

6

20

Data Terminal Ready

Data Terminal Ready

20

6

Data Set Ready

Ground

7

7

Ground

This data was contributed by the team at The Hardware Book.

 

Discuss Null Modem Adapter in the forums.

 
(0 - user rating)

You need to login or register to post comments.