multifunction-rio-user-manual.pdf - 第59页

Appendix A Connecting I/O Signals

Multifunction Reconfigurable I/O User Manual A-8 ni.com

You can plug each of these 50-pin headers directly into an 8-, 16-, 24-,

or 32-channel SSR backplane for digital signal conditioning. One of the

50-pin headers contains DIO<0..23> from the NI 78xx RDIO connector.

These lines correspond to Slots <0..23> on an SSR backplane in sequential

order. The other 50-pin header contains DIO<24..39> from the NI 78xx

RDIO connector. These lines correspond to Slots <0..15> on an SSR

backplane in sequential order. You can connect to an SSR backplane

containing a number of channels unequal to the number of lines on the

NSC68-5050 cable header. In this case, you have access only to the

channels that exist on both the SSR backplane and the NSC68-5050 cable

header you are using.

Figure A-4 shows the connector pinouts when using the NSC68-5050

cable.

Figure A-4. Connector Pinouts when Using the NSC68-5050 Cable

2

4

6

8

10

12

14

16

18

20

22

24

26

28

30

32

34

36

38

40

42

44

46

48

50

1

3

5

7

9

11

13

15

17

19

21

23

25

27

29

31

33

35

37

39

41

43

45

47

49

DIO23

DIO22

DIO21

DIO20

DIO19

DIO18

DIO17

DIO16

DIO15

DIO14

DIO13

DIO12

DIO11

DIO10

DIO9

DIO8

DIO7

DIO6

DIO5

DIO4

DIO3

DIO2

DIO1

DIO0

+5V

No Connect

DGND

2

4

6

8

10

12

14

16

18

20

22

24

26

28

30

32

34

36

38

40

42

44

46

48

50

1

3

5

7

9

11

13

15

17

19

21

23

25

27

29

31

33

35

37

39

41

43

45

47

49

No Connect

DIO39

DIO38

DIO37

DIO36

DIO35

DIO34

DIO33

DIO32

DIO31

DIO30

DIO29

DIO28

DIO27

DIO26

DIO25

DIO24

+5V

No Connect

DGND

DIO 0–23 Connector

Pin Assignment

DIO 24–39 Connector

Pin Assignment

B

Using the SCB-68

Shielded Connector Block

This appendix describes how to connect input and output signals to the

NI 78xx with the SCB-68 shielded connector block.

The SCB-68 has 68 screw terminals for I/O signal connections. To use

the SCB-68 with the NI 78xx, you must configure the SCB-68 as a

general-purpose connector block. Refer to Figure B-1 for the

general-purpose switch configuration.

Figure B-1. General-Purpose Switch Configuration for the SCB-68 Terminal Block

After configuring the SCB-68 switches, you can connect the I/O signals to

the SCB-68 screw terminals. Refer to Appendix A, Connecting I/O Signals,

for the connector pin assignments for the NI 78xx. After connecting

I/O signals to the SCB-68 screw terminals, you can connect the

SCB-68 to the with the SHC68-68-RMIO (for Connector 0 on the

NI 783x/784x/785x) or SHC68-68-RDIO (Connector <0..3> on the

NI 781x and Connector <1..2> on the NI 783x/784x/785x) shielded cables.

S5 S4 S3

S1

S2

C

Technical Support and

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