multifunction-rio-user-manual.pdf - 第58页

Appendix A Connecting I/O Signals

Figure A-3 shows the connector pinouts when using the NSC68-262650

cable.

Figure A-3. Connector Pinouts when Using NSC68-262650 Cable

Connecting to SSR Digital Signal Conditioning

NI provides cables that allow you to connect signals from the NI 78xx

directly to SSR backplanes for digital signal conditioning.

The NSC68-5050 cable connects the signals on the NI 78xx RDIO

connectors directly to SSR backplanes for digital signal conditioning. This

cable has a 68-pin male VHDCI connector on one end that plugs into the

NI 78xx RDIO connectors. The other end of this cable provides

two 50-pin female headers.

2

4

6

8

10

12

14

16

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20

22

24

26

1

3

5

7

9

11

13

15

17

19

21

23

25

AO0

AOGND0

AO1

AO2

AOGND2

AO3

AO4

AOGND4

AO5

AO6

AOGND6

AO7

No

Connect

No

Connect

No

Connect

AOGND1

No

Connect

No

Connect

AOGND3

No

Connect

No

Connect

AOGND5

No

Connect

No

Connect

AOGND7

No

Connect

2

4

6

8

10

12

14

16

18

20

22

24

26

1

3

5

7

9

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15

17

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23

25

AI0+

AIGND0

AI1+

AI2+

AIGND2

AI3+

AI4+

AIGND4

AI5+

AI6+

AIGND6

AI7+

AISENSE

AI0–

AI1–

AIGND1

AI2–

AI3–

AIGND3

AI4–

AI5–

AIGND5

AI6–

AI7–

AIGND7

No

Connect

AI 0–7 Connector

Pin Assignment

2

4

6

8

10

12

14

16

18

20

22

24

26

28

30

32

34

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38

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50

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9

11

13

15

17

19

21

23

25

27

29

31

33

35

37

39

41

43

45

47

49

No

Connect

No

Connect

No

Connect

No

Connect

No

Connect

No

Connect

No

Connect

No

Connect

DIO15

DIO14

DIO13

DIO12

DIO11

DIO10

DIO9

DIO8

DIO7

DIO6

DIO5

DIO4

DIO3

DIO2

DIO1

DIO0

+5V

No

Connect

No

Connect

No

Connect

No

Connect

No

Connect

No

Connect

No

Connect

No

Connect

No

Connect

No

Connect

No

Connect

No

Connect

No

Connect

No

Connect

No

Connect

No

Connect

No

Connect

DGND

DIO 0–15 Connector

Pin Assignment

AO 0–7 Connector

Pin Assignment

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

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16

18

20

22

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26

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32

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50

1

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31

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39

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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