Appendix B Cables and Connectors

SCSI Connector

Page B - 3

SCSI

Connector

Maximum Cable Length

The RF3880 supports the differential SCSI interface by use of the 68-pin “P” cable connector. Its connector pin-outs are as shown in the table below.

Maximum cable length for differential operation is 25 meters (or 82 feet). This length includes internal cabling and cable stubs.

Signal Name

Pin Number

Cable Conductor Number

Pin Number

Signal Name

+DB (12)

1

1

2

35

-DB (12)

 

 

 

 

 

 

+DB (13)

2

3

4

36

-DB (13)

 

 

 

 

 

 

+DB (14)

3

5

6

37

-DB (14)

 

 

 

 

 

 

+DB (15)

4

7

8

38

-DB (15)

 

 

 

 

 

 

+DB (P1)

5

9

10

39

-DB (P1)

 

 

 

 

 

 

Ground

6

11

12

40

Ground

 

 

 

 

 

 

+DB (0)

7

13

14

41

-DB (0)

 

 

 

 

 

 

+DB (1)

8

15

16

42

-DB (1)

 

 

 

 

 

 

+DB (2)

9

17

18

43

-DB (2)

 

 

 

 

 

 

+DB (3)

10

19

20

44

-DB (3)

 

 

 

 

 

 

+DB (4)

11

21

22

45

-DB (4)

 

 

 

 

 

 

+DB (5)

12

23

24

46

-DB (5)

 

 

 

 

 

 

+DB (6)

13

25

26

47

-DB (6)

 

 

 

 

 

 

+DB (7)

14

27

28

48

-DB (7)

 

 

 

 

 

 

+DB (P)

15

29

30

49

-DB (P)

 

 

 

 

 

 

Diffsens

16

31

32

50

Ground

 

 

 

 

 

 

Termpwr

17

33

34

51

Termpwr

 

 

 

 

 

 

Termpwr

18

35

36

52

Termpwr

 

 

 

 

 

 

Reserved

19

37

38

53

Reserved

 

 

 

 

 

 

+ATN

20

39

40

54

-ATN

 

 

 

 

 

 

Ground

21

41

42

55

Ground

 

 

 

 

 

 

+BSY

22

43

44

56

-BSY

 

 

 

 

 

 

+ACK

23

45

46

57

-ACK

 

 

 

 

 

 

+RST

24

47

48

58

-RST

 

 

 

 

 

 

+MSG

25

49

50

59

-MSG

 

 

 

 

 

 

+SEL

26

51

52

60

-SEL

 

 

 

 

 

 

+C/D

27

53

54

61

-C/D

 

 

 

 

 

 

+REQ

28

55

56

62

-REQ

 

 

 

 

 

 

+I/O

29

57

58

63

-I/O

 

 

 

 

 

 

Ground

30

59

60

64

Ground

 

 

 

 

 

 

+DB (8)

31

61

62

65

-DB (8)

 

 

 

 

 

 

+DB (9)

32

63

64

66

-DB (9)

 

 

 

 

 

 

+DB (10)

33

65

66

67

-DB (10)

 

 

 

 

 

 

+DB (11)

34

67

68

68

-DB (11)

 

 

 

 

 

 

Table 121: Cable Connector Pin-outs for the RF3886

User’s Guide

21020285 D

Page 203
Image 203
Ciprico Rimfire 3880 manual Maximum Cable Length, Appendix B Cables and Connectors Scsi Connector