The DB9 Null Modem Adapter converts a standard serial cable into a Null Modem cable
NULLMODEM9 is a DB9 male/female nullmodem adapter that e.g. can be added as an extension of a regular serial cable with a DB9 connector. The adapter ensures that the connection becomes a null modem connection.
The leg connections are 1+6→4 | 2→3 | 3→2 | 4→1+6 | 5→5 | 7→8 | 8→7
Null modem cable 1 x DB9 male / 1 x DB9 female.
Sold in several lengths
Zero modem cable with DB9 male / female, 20 cm
Pin 2 to pin 3
Pin 3 to pin 2
Pin 5 to pin 5
Cable screen connected to DB9 male plug
Cable display is not connected to the DB9 female connector
The connectors are with finger screws
Null modem cable 1 x DB9 Han / 1 x DB9 She.
negotiated in several lengths
Universal null modem cable
2 x DB9 female / 2 x DB25 female
Length: 1.8 m
