The most common serial interface standard is RS232 or EIA232C established by the Electronic Industries Association ( EIA). This standard specifies transmission at signal rates of 20kps or less with a 15 meter maximum distance.
DB9 Null Modem Cable Wiring Arrangement
Wiring D |
Wiring G
|
||
DB9
|
DB9
|
DB9
|
DB9
|
1
|
1
|
2
|
3
|
2
|
3
|
3
|
2
|
3
|
2
|
4
|
1,6
|
4
|
4
|
1
|
4
|
5
|
5
|
6
|
4
|
6
|
6
|
5
|
5
|
7
|
7
|
7
|
8
|
8
|
8
|
8
|
7
|
9
|
9
|
SHELL
|
SHELL
|
SHELL
|
SHELL
|
|
|
Item |
Description
|
Wiring
|
Length
|
261202-1.5
|
Null Modem Cable, Molded DB9 M / F
|
D
|
1.5 M
|
261202-3
|
Null Modem Cable, Molded DB9 M / F
|
3 M
|
|
261202-5
|
Null Modem Cable, Molded DB9 M / F
|
5 M
|
|
261202-7.5
|
Null Modem Cable, Molded DB9 M / F
|
7.5 M
|
Item |
Description
|
Wiring
|
Length
|
261203-1.5
|
Null Modem Cable, Molded DB9 M / F
|
G
|
1.5 M
|
261203-3
|
Null Modem Cable, Molded DB9 M / F
|
3 M
|
|
261203-5
|
Null Modem Cable, Molded DB9 M / F
|
5 M
|
|
261203-7.5
|
Null Modem Cable, Molded DB9 M / F
|
7.5 M
|
Item |
Description
|
Wiring
|
Length
|
261204-1.5
|
Null Modem Cable, Molded DB9 F / F
|
D
|
1.5 M
|
261204-3
|
Null Modem Cable, Molded DB9 F / F
|
3 M
|
|
261204-5
|
Null Modem Cable, Molded DB9 F / F
|
5 M
|
|
261204-7.5
|
Null Modem Cable, Molded DB9 F / F
|
7.5 M
|
Item |
Description
|
Wiring
|
Length
|
261205-1.5
|
Null Modem Cable, Molded DB9 F / F
|
G
|
1.5 M
|
261205-3
|
Null Modem Cable, Molded DB9 F / F
|
3 M
|
|
261205-5
|
Null Modem Cable, Molded DB9 F / F
|
5 M
|
|
261205-7.5
|
Null Modem Cable, Molded DB9 F / F
|
7.5 M
|