RS-422/449 (EIA-449) DCE Cable Pinout

15

1

–

Shield Ground

1

4

2

Send Data (A)

56

5

55

Send Timing (A)

60

6

59

Receive Data (A)

37

7

38

Request to Send (A)

52

8

51

Receive Timing (A)

48

9

47

Clear to Send (A)

45

10

–

Local Loopback

33

11

34

Data Mode (A)

9

12

10

Terminal Ready (A)

13

13

14

Receive Ready (A)

5

17

6

Terminal Timing (A)

36

19

–

Signal Ground

4

20

–

Receive Common

2

22

1

Send Data (B)

55

23

56

Send Timing (B)

59

24

60

Receive Data (B)

38

25

37

Request to Send (B)

51

26

52

Receive Timing (B)

47

27

48

Clear to Send (B)

34

29

33

Data Mode (B)

10

30

9

Terminal Ready (B)

14

31

13

Receiver Ready (B)

6

35

5

Terminal Timing (B)

57

37

–

Send Common

26 to 25

–

–

–